Allotrichoma (Neotrichoma) atrilabre Cresson

Mathis, Wayne N. & Zatwarnicki, Tadeusz, 2012, Revision of New World Species of the Shore-fly Subgenus Allotrichoma Becker of the Genus Allotrichoma with Description of the Subgenus Neotrichoma (Diptera, Ephydridae, Hecamedini), ZooKeys 161, pp. 1-101 : 65-72

Allotrichoma (Neotrichoma) atrilabre Cresson Figs 7579

Allotrichoma atrilabre Cresson 1926: 252; 1942: 108 [list, eastern United States]. Deonier 1964: 120 [key, Iowa]; 1965: 501 [natural history]. Wirth 1965: 736 [Nearctic catalog]. Cole 1969: 397 [list]. Mathis and Zatwarnicki 1995: 150 [world catalog].

Allotrichoma yosemite Cresson 1926: 252; 1942: 108 [list, Rocky Mountains and westward of United States]. Wirth 1965: 736 [Nearctic catalog]; 1968: 5 [Neotropical catalog]. Cole 1969: 397 [list]. Mathis and Zatwarnicki 1995: 154 [world catalog]. New Synonym.

Description.

This species is distinguished from congeners by the following combination of characters: Small shore flies, body length 1.15-1.45 mm. Head: Frons mostly unicolorous, at most with narrow, anterior fronto-orbits slightly lighter in color, lacking distinctively colored ocellar triangle; pseudopostocellar setae subequal in length to ocellar setae. Pedicel with well-developed, proclinate, dorsal seta. Facial coloration sexually dimorphic, males unicolorous and darker; face with dorsal 2/3 between antennal grooves shallowly carinate, becoming more prominent ventrad of facial grooves, slightly tuberculate; clypeus mostly bare, black, subshiny; maxillary palpus blackish.

Thorax: Mesonotum generally dark brown; chaetotaxy generally well developed; prescutellar acrostichal setae much larger than other acrostichal setae and more widely set apart; presutural supra-alar seta well developed, length subequal to notopleural setae; katepisternum with 2 setae, 2nd seta smaller and inserted below larger seta. Wing mostly milky white; veins behind costa brownish; alular marginal setulae short, less than 1/2 alular height; costal vein ratio 0.34-0.44; M vein ratio 0.33-0.36. Legs: tibiae dark, concolorous with femora.

Abdomen: 5th sternite transversely narrow, shallowly arched, bearing numerous setulae. Male terminalia (Figs 75-78): Epandrium in posterior view (Fig. 75) uniformly and broadly as an inverted U, slightly broader ventrally and ventral apex abruptly curved medially; in lateral view (Fig. 76) moderately narrow, height 3X width, widest dorsally, dorsal surface slightly produced posteriorly, thereafter ventrally slightly tapered and shallowly curved anteriorly, ventral margin produced anteriorly as a short, pointed extension; cercus in posterior view (Fig. 75) becoming broader ventrally, ventral margin broadly rounded, dorsal margin slightly produced and pointed medially, in lateral view (Fig. 76) with anterior margin shallowly curved, posterior margin rounded, slightly narrower dorsally than ventrally; surstylus a rod-like, nearly horizontal, slender process that bears prominent setulae posteriorly; aedeagus in ventral view (Fig. 77) elongate, narrowly rectangular, almost parallel sided, base rounded, not cleft apically, in lateral view (Fig. 78) very shallowly curved, broadly elliptical, apex broadly rounded; phallapodeme in lateral view (Fig. 78) well developed, keel broadly triangular, apex broadly but asymmetrically rounded, in ventral view (Fig. 77) as a double T (2 cross bars); gonite in lateral view (Fig. 78) short, as high or higher than long, apical margin irregularly truncate, bearing 2-3 setulae, in ventral view (Fig. 77) short, more or less triangular; hypandrium in ventral view (Fig. 77) broadly U-shaped, arms angled posterolaterally, in lateral view (Fig. 78) with base slightly hooked, becoming wider apically, bearing numerous setulae along apical half.

Type material.

The holotype male of Allotrichoma atrilabre Cresson is labeled "Lansdale [Montgomery County] P[ennsylvani]a[,] VII, 12, 1908 [12 Jul 1908]/♂ / TYPE, Allotrichoma ATRILABRIS E.T. Cresson, Jr. [red; species and generic names handwritten]/Loaned by A.N.S.P." The holotype is double mounted (glued to a paper triangle), is in poor condition (fore- and midlegs on right side and left wing missing; right wing, left 1st flagellomere, and right hindleg removed and glued to a second paper triangle; abdomen removed, dissected, structures stored in an attached microvial of glycerin), and is deposited in the ANSP (6320). Cresson (1926) also listed two male and one female paratopotypes (ANSP).

The holotype male of Allotrichoma yosemite Cresson is labeled "Yosemite Valley[,] V,22,'08, [22 May 1908] Cal[ifornia]./♂/TYPE Allotrichoma YOSEMITE E.T.Cresson,Jr. [red; species and generic names handwritten]/Loaned by A.N.S.P." The holotype is double mounted (minuten in a rectangular card), is in good condition (right wing torn; abdomen removed, dissected, the parts stored in an attached microvial of glycerin), and is deposited in the ANSP (6321). Cresson (1926) also listed one male and eight female paratopotypes (ANSP).

Type locality.

United States. Pennsylvania. Montgomery: Lansdale (40°14.5'N, 75°17.1'W).

Other specimens examined from the New World.

CANADA. BRITISH COLUMBIA. Langley (49°04.4'N, 122°34.4'W), 9 Aug 1917, A. L. Melander (1♂; USNM). Savona (50°45.2'N, 120°50.6'W), 19 Jul 1988, R. Danielsson (1♂; ZIL).

ONTARIO. Hearst (75 km W; 49°52'N, 85°21.8'W), 9 Jul 1954, A. H. Sturtevant (1♂; USNM).

MEXICO. BAJA CALIFORNIA. Arroyo Grande (28°43.3'N, 113°57'W), 27 Mar 1964, M. E. Irwin (♂, 1♀; UCR). San Felipe (5 km N, 31°03'N, 114°49'W), 25 Aug 1964, J. C. Ball (1♀; UCR). Sierra San Pedro Martir (31°02.7'N, 115°28'W), 15 Jun 1953, P. H. Arnaud, Jr. (6♂; USNM).

GUERRERO. Chilpancingo (13 km E; 17°33.1'N, 99°30'W), 7 Aug 1962, N. Marston (4♂, 1♀; KSU).

JALISCO. Lagos de Moreno (4.5 km E; 21°21.5'N, 101°55.8'W), 27 Jul 1962, N. Marston (1♂, 4♀; KSU).

MICHOACAN. Morelia (18 km N, 19°41.9'N, 101°11.2'W), 28 Jul 1962, N. Marston (1♂; KSU).

MORELOS. Cuernavaca (18°56'N, 99°13.9'W), 4 Aug 1938, L. J. Lipovsky (1♀; KU).

NUEVO LEON. China (16 km NE; 25°47.3'N, 99°12.5'W), 18 Jul 1954 (1♀; KU).

SINALOA. Culiacán (24°48.2'N, 107°23.3'W), 21 Jan 1951, A. A. Hubert (1♀; KU). Los Mochis (26°15.6'N, 109°03.1'W), 24 Aug 1964, E. I. Schlinger (1♂; UCR).

UNITED STATES. ALABAMA. Mobile: Theodore (30°32.9'N, 88°10.5'W), 21 Jun 1917 (1♀; CU).

ARIZONA. Cochise: Apache (21 km S; 31°38'N, 109°11'W), 13 Aug 1970, J. G. Rozen (1♀; AMNH); Portal (8 km W; 31°53'N, 109°12.3'W), Southwest Research Station, 25 Jun 1955, M. Statham (1♀; AMNH). Coconino: Flagstaff (35°11.9'N, 111°39.1'W), 11 Jun 1909, F. C. Pratt (2♂, 3♀; USNM). Pima: Box Canyon, Santa Rita Mountains (31°48.1'N, 110°48.5'W), 12 Jun 1968, A. Menke, O. S. Flint (1♂; USNM). Yavapai: Prescott (34°32.4'N, 112°28.1'W), 15 Jun 1959, A. H. Sturtevant (1♀; USNM).

ARKANSAS. Franklin County (35°35'N, 93°50'W), 3 Jun 1965, H. R. Dodge (1♀; USNM).

CALIFORNIA. Calavaras: Milton (38°01.9'N, 120°51.1'W), 21 Oct 1917, J. C. Bradley (8♂, 3♀; CU). Humbolt: Scotia (5.5 km S; 40°28'N, 124°06'W), 10 Jun 1965, T. W. Fisher (2♂; UCR). Inyo: Bishop (37°21.8'N, 118°23.7'W), 24 Jul 1940, L. J. Lipvosky (1♂; KU). Lassen: Mt. Home (1 km N, Forest Service Road 18; 40°41.9'N, 121°18.7'W), 15 Jul 1989, R. S. Zack (19♂, 103♀; WSU). Lassen: Hallelujah Junction (39°46.5'N, 120°02.3'W), 22 Jun 1964, M. E. Irwin (2♂; UCR). Mono: Mammoth lakes (37°36.3'N, 119°0.7'W), 29 Jul 1940, L. C. Kultert (12♂, 5♀; KU). Monterey: Arroyo Seco (32°54.3'N, 116°35'W), 1 Jul 1948, W. W. Wirth (1♂; USNM). Orange: Irvine Lake (33°46.6'N, 117°43.1'W), 12 Oct 1963, M. E. Irwin (1♀; UCR); San Juan Creek (33°30'N, 117°39'W), 14 Jul 1965, R. Orth (2♀; UCR). Riverside: Hemet Lake (33°39.7'N, 116°42.4'W), 19 May 1965, T. W. Fisher (1♂, 1♀; UCR); Massacre Canyon (33°50.6'N, 116°59.8'W), 4 May 1965, M. E. Irwin (1♀; UCR); Riverside (33°57.2'N, 117°23.8'W), 25 Aug-4 Oct 1962, 1963, M. E. Irwin, E. I. Schlinger (7♀; UCR); Santa Ana River (33°57.7'N, 117°28.2'W), 26 Jun 1965, G. R. Ballmer (1♀; UCR); Temecula (33°29.3'N, 117°08.5'W), 29 Jun 1965, R. Orth (1♀; UCR); Vail Lake (33°29.4'N, 116°58.1'W), 29 Jun 1965, R. Orth (1♀; UCR). San Bernardino: Echo (35°18'N, 116°48.3'W), 10 Aug 1940, L. J. Lipovsky (2♂, 3♀; KU). San Diego: Jacumba Spring (32°37'N, 116°11.4'W), 28 Jun 1917, J. M. Aldrich (1♂; USNM); Lake Henshaw (8 km W; 33°14'N, 116°43'W), 19 Jun 1965, G. R. Ballmer (1♀; UCR). San Luis Obispo: Cayucos Creek (8 km W; 35°28.6'N, 120°52.5'W), 5 Aug 1962, E. I. Schlinger (1♀; UCR). Santa Clara: Livermore (48 km S; 37°35.7'N, 121°43.5'W), 10 Jul 1971, W. J. Turner (4♂, 16♀; WSU). Shasta: Logan Lake (18 km S Hat Creek; 40°39.8'N, 121°29'W), 14 Jul 1989, R. S. Zack (9♂, 9♀; WSU); Redding (40°35.2'N, 122°23.5'W), 12 Jun 1965 (1♀; UCR); Viola (40°31.1'N, 121°40.7'W), 19 May 1941 (1♀; KU). Siskiyou: Klamath River (5 km E; 41°51.7'N, 122°50'W), 28 Jul 1988, R. Danielsson (1♂; ZIL); Taylor Lake (41°21.7'N, 122°58.1'W; 1980 m), 28 Jul 1968, H. B. Leech (17♂, 6♀; CAS); Yreka (10 km NW; 41°45'N, 122°39'W), 11 Jun 1984, R. Danielsson (1♂; ZIL). San Bernardino: Echo (35°18'N, 116°48.3'W), 10 Aug 1940, L. J. Lipovsky (2♂, 3♀; KU). Santa Barbara: Santa Ynez River (34°36.5'N, 120°04.7'W), 23 Jun 1965, M. E. Irwin (1♀; UCR). Tulare: Terminus Reservoir (36°25'N, 119°01'W), 12 May 1965, T. W. Fisher (1♀; UCR); Three Rivers (36°26.3'N, 118°54.3'W), 5 Aug 1940, L. J. Lipovsky (1♀; KU).

COLORADO. Larimer: Fort Collins (near; 40°35.1'N, 105°05.1'W; stream), 11 Jun-8 Jul 1938, 1986, M. T. James, R. S. and V. L. Zack (2♀; CSU, WSU). Moffat: Hells Canyon (10 km W; 40°57'N, 108°43'W), 21 Jun 1946, M. T. James (2♀; CSU).

DELAWARE. Sussex: Lewes Angola Neck Park (38°40.3'N, 75°09.1'W), 21 Sep 2007, G. A. Foster, A. M. Welch (1♀; USNM).

IDAHO. Benewah: Chatcolet (47°22.3'N, 116°54.8'W), Aug 1915, A. L. Melander (2♂; USNM). Latah: Bear Creek (46°37.8'N, 116°32'W), 28 Aug 1990, R. S. Zack (2♂; WSU); Big Meadow Creek (46°44'N, 116°45.5'W), 31 Jul 1979, R. S. Zack (2♂, 3♀; WSU); Helmer (1.6 km W; 46°48'N, 116°29'W; farm pond), 28 Aug 1990, R. S. Zack (4♂; WSU).

ILLINOIS. Champaign: Mahomet (40°11.7'N, 88°24.3'W), 6 Aug 1914 (1♀; INHS); Urbana (40°06.6'N, 88°12.4'W), 22 Jul-21 Nov 1913, 1915 (1♂, 1♀; INHS). Morgan: Meredosia (39°49.9'N, 90°33.6'W), 19 Aug 1917 (1♀; INHS).

IOWA. Boone: Fraser Dam (42°07.7'N, 93°58.7'W), 4 Sep 1960, D. L. Deonier (1♂; USNM).

KANSAS. Reno: (37°57'N, 98°05'W), 22 Sep (1♂; KSU). Riley: Manhattan (39°11'N, 96°34'W), 14 Jul 1962, N. Marston (1♂; KSU).

MICHIGAN. Cheboygan: Bryant's Bog (45°32.8'N, 84°40.3'W), 16 Jun 1933, G. Grant (1♀; USNM).

MINNESOTA. St. Louis: Eagles Nest (47°50.4'N, 92°05.8'W), 26 Aug 1959, W. V. Balduf (1♀; INHS).

MONTANA. Flathead: Big Fork (13 km NE; 48°05.7'N, 113°58.2'W), 9 Aug 1969, B. A. Foote (1♀;USNM).

NEVADA. Humboldt: Golconda (40°57.2'N, 117°29.4'W), 11 Jul 1968, G. E. Bohart (1♂; USU). Nye: Springdale (3 km S; 37°0.7'N, 116°43.5'W), 26 May 1954, M. Cazier (1♀; AMNH). Washoe: Pyramid (40°04.5'N, 119°42.1'W), 4-5 Jul 1947, R. L. Usinger (1♂; USNM); Reno (39°33.1'N, 119°51.1'W), 2 Jul 1927, E. P. Van Duzee (1♂; USNM); Verdi (39°31.1'N, 119°59.3'W), 27 Jun 1966, R. L Brumley (3♂, 2♀; USNM).

NEW JERSEY. Ocean: Tuckerton (39°36.2'N, 74°20.8'W), 17 Jun 2004, D. and W. N. Mathis (1♂, 4♀; USNM).

NEW MEXICO. Catron: Gila River (33°13.6'N, 106°15.1'W; 1750 m), 15 Aug 2007, D. and W. N. Mathis (6♂; USNM). Chaves: Roswell (9 km E; Pecos River; 33°23.8'N, 104°24'W; 1060 m), 10 Aug 2007, D. and W. N. Mathis (3♂, 2♀; USNM). Eddy: Black River (near Rattlesnake Springs; 32°05.2'N, 104°28.3'W; 1110 m), 11 Aug 2007, D. and W. N. Mathis (1♀; USNM). Grant: Mangas Springs (32°50.5'N, 108°30.7'W), 25 Jun 1953, W. W. Wirth (7♂, 5♀; USNM); Mimbres River (NM Highways 61 and Royal John Mine Road; 32°43.8'N, 107°52'W; 1665 m), 2-22 Aug 2007, 2008, 2009, D. and W. N. Mathis (10♂, 4♀; USNM); Mimbres River (NM Hwy. 35; 19 km N NM Hwy 152; 32°56.9'N, 108°01.1'W), 2 Aug 2008, D. and W. N. Mathis (9♂; USNM). Lincoln: Ruidoso (33°19.9'N, 105°40.4'W), 26 Jun 1940, L. J. Lipovsky (4♀; KU). Sandoval: La Cueva (Junction of Highways 126 and 4; 35°52'N, 106°38.4'W; 2342 m), 6 Aug 2007, D. and W. N. Mathis (1♀; USNM).

OREGON. Baker: Goose Creek (35 km E Baker City; 44°49.2'N, 117°27.8'W; 825 m), 7 Jun 2006, D. and W. N. Mathis, T. Zatwarnicki (17♂, 5♀; TZ, USNM). Benton: Finley Wildlife Refuge (44°24.6'N, 123°19.5'W), 18 Jun 1976, W. N. Mathis (1♂; USNM). Deschutes: Tumalo Reservoir (44°10.9'N, 121°19.8'W), 23 Jun 1953, G. F. Knowlton (1♂, 1♀;KU). Douglas: North Umpqua River (42°43.2'N, 122°60'W; 250 m), 31 Jul 2005, D. and W. N. Mathis (4♂, 1♀; USNM). Harney: King Mountain Lookout turnoff (43°50.6'N, 118°57.2'W; 1537 m), 8 Aug 2005, D. and W. N. Mathis (11♂, 5♀; USNM); Malheur National Wildlife Refuge, Dredger Pond (43°16'N, 118°50.7'W), 29 Aug 1983, R. S. Zack (1♀; WSU); Page Springs Campground, Blitzen River (42°47'N, 118°51'W; 1300 m), 6 Aug 2005, D. and W. N. Mathis (3♂; USNM); Pikes Creek (42°34.5'N, 118°31.7'W; 1320 m), 7 Aug 2005, D. and W. N. Mathis (11♂, 3♀; USNM); Steens Mountain, Fish Lake Campground (42°44.3'N, 118°38.7'W; 2250 m), 6 Aug 2005, D. and W. N. Mathis (7♂, 3♀; USNM). Jackson: Prospect (42°45'N, 122°29.3'W), 10 Aug 1951, A. H. Sturtevant (2♂, 1♀; USNM). Klamath: Klamath River (12 km W Keno; 42°07.6'N, 121°56'W), 27 Jul 1988, R. Danielsson (2♂; ZIL). Lake: Hart Mountain National Antelope Refuge (42°30'N, 119°36.1'W), 27 Aug 1983, R. S. Zack (2♂, 2♀; WSU); Lakeview (43.5 km E; Drake Creek; 42°11'N, 119°59.3'W), 29 Jul 2005, D. and W. N. Mathis (16♂, 9♀; USNM). Lane: Hand Creek (43°56.3'N, 123°51.9'W), 11 Jul 1972, W. N. Mathis (1♂; USNM). Umatilla: McNary Dam (45°56.2'N, 119°17.9'W), 17 Apr 1993, R. S. Zack (1♂; WSU). Union: Ladd Canyon (45°12.8'N, 118°01.6'W; 1295 m), 30 Jul 1977, E. J. Davis, R. S. Zack (4♂, 2♀; WSU). Wasco: Maupin (45°10.5'N, 121°04.9'W), 10 Aug 1950, A. H. Sturtevant (1♂; USNM).

TEXAS. Brewster: Boquillas Canyon, Big Bend National Park (29°12.7'N, 102°53.2'W), 20 Jun 1953, W. W. Wirth (2♂; USNM). Blanco: Miller Creek (30°15.2'N, 98°31.7'W; 410 m), 3 Jun 2004, W. N. Mathis (7♂, 6♀; USNM). Cameron: Southmost (25°51.2'N, 97°23.4'W), 13 Jun 1958 (1♀; KU). Kimble: Junction (South Llano River; 30°29.5'N, 99°45.4'W), 4-6 Jul 1986, R. S. Zack (1♂, 2♀; WSU); Junction (South Llano River; 30°29.6'N, 99°45.1'W; 510 m), 4 Jun 2004, W. N. Mathis (3♂; USNM). Kinney: Del Rio (30 km E; 29°20'N, 100°31.6'W), 5 Jun 2994, W. N. Mathis (7♂, 5♀; USNM). Sabine: Yellowpine, Toledo Bend, Lakeview Campground (31°15.6'N, 93°49.5'W), 30 Jun 1986, R. Danielsson (1♂; ZIL). San Patricio: Mathis (6.5 km S; Nueces River; 28°02.8'N, 97°51.8'W; 18 m), 5 Jun 2004, W. N. Mathis (1♂; USNM). Val Verde: Comstock (16 km N, Pecos River; 29°53.7'N, 101°09.1'W), 4 Jun 2004, W. N. Mathis (1♂; USNM).

UTAH. Cache: Providence (41°42.4'N, 111°49'W), 19 Aug 1954, G. F. Knowlton (1♀; KU). Emery: Green River (Green River; 38°59.6'N, 110°08.5'W; 1240 m), 31 Jul 2007, D. and W. N. Mathis (2♂; USNM). Garfield: Boulder Mail Trail/Upper Calf Creek Falls (37°52.3'N, 111°28.3'W), 12 Jul 2000, M. Moody, C. R. Nelson (13♀; BYU);. Grand: Crystal Geyser (14.5 km SE Green River; 38°56.3'N, 110°08.1'W; 1000 m), 15 Aug 2008, D. and W. N. Mathis (1♂; USNM); Swasey Beach (15.3 km N Green River; 39°07'N, 110°06.6'W; Green River; 1255 m), 30 Jul-15 Aug 2007, 2008, D. and W. N. Mathis (7♂, 1♀; USNM); Thompson Spring (8.9 km N Thompson Springs; 39°02.3'N, 109°43.4'W; 1740 m), 1 Aug 2007, D. and W. N. Mathis (2♂; USNM). Kane: Last Chance Creek Junction, Smoky Mountain Road (37°20.8'N, 111°31.6'W; 1920 m), 19 Jun 2000, E. C. Green, W. N. Mendel (1♂, 1♀; BYU). Kane: Kanab (37°02.8'N, 112°31.6'W), 14 Jul 1948, G. F. Knowlton (1♂, 1♀; USNM). Millard: Delta (39°21.1'N, 112°34.6'W), 14 Aug 1940, L. J. Lipovsky (1♂; KU). Salt Lake: Magna (40°42.5'N, 112°06.1'W), 2 Jun 1954, G. F. Knowlton (1♀; KU). San Juan: Dry Wash Reservoir (19 km W Blanding: 37°46.5'N, 109°32.4'W; 2355 m), 2 Aug 2007, D. and W. N. Mathis (1♂; USNM); Johnson Canyon (21 km W Blanding: 37°47.6'N, 109°30.7'W; 2335 m), 2 Aug 2007, D. and W. N. Mathis (1♂; USNM).

VIRGINIA. Fairfax: Fairfax (38°50.5'N, 77°18.5'W), Jul 1954, M. R. Wheeler (2♂; USNM); Great Falls (Patowmack Canal; 39°00.1'N, 77°15.2'W), 25 Jul-29 Aug 2006, 2007, D. and W. N. Mathis (3♂; USNM); Great Falls (quarry; 38°59.1'N, 77°14.8'W; 50 m), 13 Jun 2007, D. and W. N. Mathis (1♂, 1♀; USNM); Great Falls (river trail; Potomac River; 38°59.1'N, 77°14.6'W; 60 m), 3 Apr 2007, D. and W. N. Mathis (1♂, 2♀; USNM); Turkey Run (mouth; 38°57.9'N, 77°09.4'W), 22 May-17 Sep 2006, 2007, D. and W. N. Mathis, H. B. Williams, T. Zatwarnicki (13♂, 5♀; USNM). Roanoke: Salem (Roanoke River; 37°16.1'N, 80°02.2'W; 300 m), 23 Sep 2007, D. and W. N. Mathis (1♂, 1♀; USNM). Spotsylvania: Rappahannock River (38°18.8'N, 77°32.5'W), 3 Jul-10 Oct 2007, D. and W. N. Mathis (13♂, 1♀; USNM). Stafford: Aquia Harbour, Lions Park (38°27'N, 77°23.3'W), 1 Jun 2007, D. and W. N. Mathis (1♂; USNM); Falmouth (38°19.2'N, 77°28.1'W; Rappahannock River; 9 m), 18 Apr-30 Jun 2007, 2008, D. and W. N. Mathis (7♂, 2♀; USNM). York: Maury Lake (ca. James River; 37°02.5'N, 76°29.2'W), 19 Aug 2006, D. and W. N. Mathis (7♂, 1♀; USNM).

WASHINGTON. Adams: Lower Crab Creek (46°54.6'N, 119°17.3'W), 28 Aug 1980, R. S. Zack (6♂, 10♀; USNM). Benton: near Hanford townsite (46°35'N, 119°23'W), 20 Apr 1994, R. S. Zack (1♂; WSU); Snively Spring, Hanford (46°27.1'N, 119°42.8'W), 11 Apr 1994, R. S. Zack (1♂; WSU). Franklin: Levey (Snake River; 46°05'N, 118°52'W), 27 Jul 1992, D. Mathis (2♂; USNM). Grant: O'Sullivan Dam (46°59'N, 119°17.4'W), 22 May 1954, M. T. James (1♂; WSU); Othello (3.2 km W; 46°49.6'N, 119°13.4'W), 25 Jul 1992, R. S. Zack (4♀; WSU). Lincoln: Wilbur Pond (47°45.6'N, 118°42.3'W), 8 Jul 1993, R. S. Zack (1♀; WSU). Okanogan: Cameron Lake (48°18'N, 119°32.6'W), 22 Jul 1983, R. D. Akre, R. S. Zack (3♂, 2♀; WSU); Conconully (29 km NW, Tiffany Meadow; 48°41.3'N, 119°58.1'W; 1920 m), 4 Jun 1975, N. E. Woodley (1♀; WSU); Cook Lake (47°33.6'N, 119°28'W), 22 Jul 1983, R. D. Akre, R. S. Zack (12♂, 19♀; WSU); Okanogan (15 km SW, Soap Lake; 48°14.1'N, 119°39'W), 23 Jul 1983, R. D. Akre, R. S. Zack (10♂, 13♀; WSU); Penley Lake (about 8 km SE Okanogan; 48°17.6'N, 119°32.5'W), 22 Jul 1983, R. D. Akre, R. S. Zack (54♂, 78♀; WSU). Pend Oreille: Indian Island near Furport (48°14.4'N, 117°10'W), 23 Jun 1982, R. S. Zack (5♂, 3♀; WSU); Usk (11 km E; 88°18.4'N, 117°14'W), 23 Jun 1982, R. S. Zack (3♂, 1♀; WSU). Pierce: Cayuse Pass (46°52'N, 121°32.3'W), 8 Aug 1979, R. S. Zack (5♂, 4♀; WSU); Sunrise Point, Mount Rainier National Park (1.6 km W; 46°55.2'N, 121°35.2'W), 8 Aug 1979, R. S. Zack (1♂; WSU). Whitman: Almota (46°42.2'N, 117°28.2'W), 27 Apr 1972, W. J. Turner (1♀; WSU); Pampa pond, 8 km W LaCrosse (46°34.6'N, 118°05'W), 7 Jul 1993, R. S. Zack (4♀; WSU). Spokane: Elokia Lake (48°01.6'N, 117°22.7'W), 24 Jun 1982, R. D. Akre, R. S. Zack (1♂; WSU).

Distribution (Fig. 79). Nearctic: Canada (British Columbia), United States (Alabama, Arizona, Arkansas, California, Colorado, Delaware, Idaho, Illinois, Iowa, Kansas, Michigan, Minnesota, Montana, Nevada, New Jersey, New Mexico, Oregon, Pennsylvania, Texas, Utah, Virginia, Washington). Neotropical: Mexico (Guerrero, Jalisco, Michoacan, Morelos, Nuevo Leon, Sinaloa).

Natural history.

Deonier (1965: 501) found this species to be rare in limnic wrack, mud shore, and sand shore habitats in Iowa. Runyan and Deonier (1979) illustrated the egg of this species.