Liriomyza langei Frick, 1951

Lonsdale, Owen, 2011, The Liriomyza (Agromyzidae: Schizophora: Diptera) of California 2850, Zootaxa 2850 (1), pp. 1-123 : 61-62

Liriomyza langei Frick

Figs 4, 129–131

Agromyza scutellata var. orbona Meigen. Misidentification , in part. Melander 1913: 258; Frost 1943: 259.

Liriomyza langei Frick 1951: 81, 1952a: 403 , 1958: 1, 1959: 405; Scheffer & Lewis 2001: 648 [stat. reinst.]; Scheffer et al. 2001: 1177.

Liriomyza huidobrensis (Blanchard) . Misidentification. Spencer 1973a: 215 [as syn. of L. huidobrensis ], 1981: 241; Spencer & Steyskal 1986: 119; Steck 1996: 1 (in part); Takano et al. 2008: 397.

Liriomyza dianthi Frick 1958: 1 . Syn. Frick (1964). Spencer 1973a: 215 [as syn. huidobrensis ].

Fig. 4. Wing length 1.6–2.2mm (♂), 1.9–2.3mm (♀). Length of ultimate section of vein CuA 1 divided by penultimate section: 1.8–2.7. Eye height divided by gena height: 3.5–4.2. Scutum shining.

Chaetotaxy: Two ori (sometimes three in larger specimens), two ors. Acrostichal setulae in four rows, rarely three.

Colouration: Calypter margin and hairs brown. Head light yellow with ocellar tubercle, back of head, clypeus and posterolateral region of frons to base of inner or outer vertical bristle (sometimes excluding space behind verticals) dark brown; lateral margin of frons brown to brownish, sometimes with small oblique extensions or entire margin of stripe reaching base of posterior three fronto-orbitals, but more commonly frons only brown to level of posterior ors; first flagellomere rarely entirely yellow (see below), often with orange tint on distal half or more, and usually variably infuscated on distal half, often only on distal or dorsoapical margin; face sometimes light brown to brown, at least medially; ventral margin of gena with thin brown stripe, sometimes paler medially and posteriorly, rarely anteriorly. Scutum dark with yellow lateral stripe becoming brownish to brown past wing base, rarely entirely yellow (see below); katatergite variable, but always brown in part; anatergite brown. Anepisternum yellow on dorsal 1/3 or less, but never entirely dark; anepimeron with limited yellow mottling; dorsal margin of meron yellow; katepisternum never yellow below level of bristle, sometimes only with dorsomedial margin yellow. Legs mostly dark brown; femora yellow apically, and fore and sometimes mid and hind femora also yellow distoventrally; femora uncommonly only brown at base and with dorsal streaking; fore coxa sometimes yellow on distal half, but always yellow apically (if paler, then fore femur with distinct yellow striations and knees more extensively yellow); base of tibiae sometimes yellowish. Abdomen brown.

Genitalia: Figs 129–131 . Surstylus with single subapical spine. Paraphallus atrophied. Hypophallus long, thin, pale and with few, strongly curved apical hairs; emerging from base of elongate, upcurved membranous section between basiphallus from mesophallus. Mesophallus slightly longer than wide, separate from distiphallus. Distiphallus short and bifid (appearing entirely divided from a distance), enclosing paired inner-distal fringed structure. Ejaculatory apodeme with pileus ejaculatorius narrow; blade short and narrow, margin clear, and base smoothly blending into stem.

Variation: Specimens with lateral margin of frons entirely yellow (uncommon) usually with lateral margin of scutum entirely yellow and first flagellomere entirely yellow. Larger (2.4–2.5mm), darker females rarely with yellow striations on mid and hind femora, brown pigment only reaching posterior ors, and eye 2.8 times higher than gena. One male with dm-cu absent medially. Females reared from “peas” sometimes with posterior margin of tergite 6 yellowish.

Hosts. See Table 1 for host genera. Examined Californian material reared from: alfalfa; artichoke; celery; chrysanthemum; lettuce; lima bean; onion; peas (including “alderman peas”, “green peas” and “pole peas”); Ambrosia chamissonis (Less.) ; spinach; sugar beet; Aster spp. (including “rainbow aster”); Calendula ; Chenopodium murale ; Dianthus sp. ; Dianthus caryophyllus ; Gypsophila ; Iva axillaris ; Pisum sativum ; Primula sp.; Senecio vulgaris ; Sonchus oleraceus . Adults have been also collected on: “ wild mustard ”; Nasturtium; radish; Ambrosia chamissonis ; Bellis ; Callistephus ; Centranthus ; Cineraria ; Convolvulus macrostegius; Petunia .

Range. USA. Identified from California, Hawaii, Oregon, Utah & Washington (Scheffer et al., 2001). Possibly present in Mexico ( Takano et al., 2005).

Type material. Liriomyza langei : Holotype, USA. California: Santa Clara Co., Sunnyvale , 15.x.1948, K.E. Frick, ex. leaf mine on garden pea (1♂, CASC) ; Paratypes examined, USA. California: Santa Clara Co., Sunnyvale, 30.ix.1948, ex. larva Pisum sativum, Lot No. 170-1, K.E. Frick (1♂ 1♀, USNM; 3♂ 5♀, CSCA; 1♂ 1♀, UCD), San Jose, 23.x.1928 (5♂ 5♀, EMEC). Liriomyza dianthi : Holotype, USA. California: San Mateo Co., Redwood City , 3.xii.1956, H. Sciaroni, ex. leaf of carnation, Dianthus caryophyllus , L. (1♂, CASC) ; Paratypes examined, USA. California: Santa Clara Co., Redwood City , xii.1956, R . H. Sciaroni, carnations (1♀ 1?, EMEC) .

Additional material examined. USA. California: 436♂ 656♀ 23? [ CASC, CSCA, CNC, EMEC, SBMN, UCD, UCR, USDA, USNM] .

Comments. See comments for Liriomyza huidobrensis .

Figures

FIGURES 125–131. Figs 125–127: Figs 128–131: Liriomyza huidobrensis (Blanchard), male genitalia; 125: ejaculatory apodeme; 126: phallus, left lateral; 127: phallus, ventral; 128: external components, ventral. L. langei Frick, male genitalia; 129: phallus, left lateral; 130: phallus, ventral; 131: ejaculatory apodeme.