Lysilinga dolichophalla Webb, 2006

Webb, Donald W. & Metz, Mark A., 2006, A Revision of the New World Genera Brachylinga Irwin and Lyneborg and Lysilinga Irwin and Lyneborg (Diptera: Therevidae: Therevinae) with the Description of a New Genus, Elcaribe Webb, Zootaxa 1288 (1288), pp. 1-241 : 222-223

Lysilinga dolichophalla Webb spec. nov.

( Figs. 365, 375, 385, 395, 405, 415, 425, 435, 448)

Etymology

Dolichos (Greek) = long, phallus (Greek) = penis. This name is used as an adjective and refers to the elongate distiphallus of the male.

Diagnosis

Lysilinga dolichophalla is taxonomically associated with L. chamela , L. digita , and L. nigra in lacking setae on the katepisternum and in having the abdomen dark reddish brown. Lysilinga dolichophalla differs from L. chamela , L. digita and L. nigra in having the halter knob pale yellow to yellowish brown; in possessing dorsocentral macrosetae; the hypoproct large, cone­shaped ( Fig. 365); and the distiphallus in lateral view (Fig. 435) with the subapical hood long, flattened laterally and expanded dorsoventrally.

Description of holotype male (MEI 147285)

Body length 10.4 mm.

Head. Length 1.0 mm. Ommatidia of homogeneous size. Frons silver gray, black dorsally; setae absent. Antenna/head length 0.87; scape and pedicel dark reddish brown, pruinescence gray, flagellum brown with basal half of first flagellomere orange brown; scape length 0.34 mm, width 0.14 mm, length/width 2.4, scape/pedicel length 3.8, scape/ flagellum width 0.78, setae dark reddish brown; pedicel length 0.09 mm, length/width 0.8; first flagellomere oval, attenuate apically, flagellum length 0.44 mm, 0.18 mm wide, length/width 2.4, flagellum/scape length 1.3. Parafacial pruinescence gray. Maxillary palpus dark yellow; length 0.42 mm, length/width 8.4; setae dark yellow. Genal setae white. Occipital setae white, elongate becoming pale yellow, lanceolate, appressed dorsally. Postocular macrosetae dark reddish brown.

Thorax. Macrosetae dark reddish brown, 3 np, 2 sa, 1 pa, 1 dc, 2 sc. Mesonotum dull brown; setae dark brown, short intermixed with pale polychromatic, lanceolate, appressed setae. Pleuron dark reddish brown, pruinescence gray; setae white on propleuron, anepisternum, laterotergite, metanepisternum, scutellum, absent on katepisternum. Wing. Membrane pale brown; veins brown; length 6.3 mm, length/width 3.2; pterostigma brown; cell m 3 open widely. Halter pale yellowish brown. Legs. Coxal macrosetae dark reddish brown. Femora dark yellow glossy; ventral setae white on fore­ and midfemora; av 1:1:4, pv 0:0:6. Tibiae dark yellow glossy. Tarsomeres 1–2 dark yellow; 3–5 pale brown.

Abdomen. Orange brown, glossy, pruinescence white on tergite 1, on posterior half of tergites 2–7 with narrow pale yellow posterior margin on tergites 3–5; dorsal setae white, appressed; lateral setae white, elongate. Terminalia : brown. Tergite 8 ( Fig. 365) with heavily sclerotized basal collar. Epandrium ( Fig. 365), setae dark reddish brown. Hypoproct ( Fig. 365) large, cone­shaped; ending distal to apex of cercus; setae dark reddish brown. Gonocoxite ventral view (Fig. 375), basal half quadrate, medial margin straight, posteromedial corner angulate then becoming emarginate before tapering apically to attenuate point, setae dark reddish brown with posteromedial patch of short setae; dorsal view ( Fig. 385) gonocoxal bridge moderately large; lateral view (Fig. 395) rectangular, tapering apically to broad point; ventral lobe (Fig. 375) lacking ventral spines. Gonostylus ( Fig. 405), basodorsal lobe absent; anterior margin smoothly rounded, lacking ventral setae; short, thick spines over lateral surface. Aedeagus with dorsal apodeme (Fig. 415) rectangular, sides rounded, posterolateral margin slightly expanded; ventral apodeme ( Fig. 425) narrow, tapered anteriorly, extending beyond anterior margin on dorsal apodeme; distiphallus dorsal view (Fig. 415), long, tapered apically to narrow point, slightly swollen medially, lateral view (Fig. 435) with apical half narrow, directed ventrally, then curved apically, subapical hood long, flattened laterally, expanded dorsoventrally; ejaculatory apodeme (Fig. 415) dark yellow, anterior half enlarged laterally, extending beyond anterior margin of dorsal apodeme, anterior margin truncate, in cross­section flattened dorsoventrally.

Female Unknown.

Distribution Lysilinga dolichophalla is known from Guatemala ( Fig. 448).

Habitats and phenology The holotype male of Lysilinga dolichophalla was collected at a light in May.

Specimens examined

Type specimen. The holotype male of Lysilinga dolichophalla Webb (MEI 147285) is labeled " GUATEMALA, Petén Tikal , (at light at camp), 17 May 1956, T. H. Hubbell " and is deposited in the UMMZ .