Calycomyza barbarensis Spencer, 1981

Lonsdale, Owen, 2021, Manual of North American Agromyzidae (Diptera, Schizophora), with revision of the fauna of the " Delmarva " states, ZooKeys 1051, pp. 1-481 : 1

Calycomyza barbarensis Spencer

Figs 452-455

Calycomyza barbarensis Spencer, 1981: 298. Spencer and Steyskal 1986b: 151.

Description.

Wing length 1.8 mm (♂). Female unknown. Length of ultimate section of vein M4 divided by penultimate section: 1.6-2.4. Eye height divided by gena height: 3.4-3.6. First flagellomere rounded. Notum shiny.

Chaetotaxy: Two ori; two ors. Postocellar and ocellar setae well-developed, the latter slightly smaller. Two well-developed dorsocentral setae. Six rows of acrostichal setulae. Ocellar seta slightly less developed than postocellar. Two posteromedial setae on mid tibia.

Colouration: Setae dark brown. Head yellow with back of head, clypeus, palpus, ocellar tubercle and antenna dark brown; frons brownish in posterolateral corner with light brown stripe extending from posterior margin to base of posterior ors along fronto-orbital plate Thorax dark brown with postpronotum (excluding dark anteromedial spot confluent with margin), notopleuron (excluding dark elongate sublateral spot) and small anterolateral spot behind suture yellow. Halter white. Calypter margin light brown with brown hairs. Legs and abdomen dark brown with fore knee narrowly yellow.

Genitalia: (Figs 452-455 ) Epandrium and surstylus with dense patch of tubercle-like setae on inner-distal margin. Hypandrium narrow, inner lobe following dorsal margin of postgonite and with two short setae on inner face. Postgonite short, pointed apically, with two outer-distal setulae. Basiphallus broadly sclerotised dorsally. Paraphallus nearly vestigial, produced as lightly sclerotised triangular extensions of membrane. Hypophallus large and broad with basolateral margins and triangular medial section well-sclerotised. Distiphallus and mesophallus short and subequal in length, fused; mesophallus constricted medially; distiphallus subcylindrical, undivided, widest at base; medial floating sclerite absent.

Host.

Unknown.

Distribution.

USA: CA, DE*, KS*, MO*, SC*, TX*.

Type material.

Holotype: USA. CA: Santa Barbara Co., Los Prietos, 23.vi.1965, J.A. Powell (1♂, CASC). [Not examined]

Material examined.

USA. CA: Riverside , 2.xii.1934, A.L. Melander (1♂, USNM), DE: Georgetown, 3.viii.1977, W.R. Allen, “79-3513”, ex. trap in soy bean plot (1♂, USNM), KS: Riley Co., 4.ix.1967, G.F. Hevel (1♂, USNM), MO: Boone Co., Columbia, 4.ix.1968, Malaise trap, F.D. Parker (1♂, USNM), SC: “Spartanbrg”, G.G. Ainslie, Webster No. 4853 (1♂, USNM), TX: San Antonio, 2.iv.1942, A.L. Melander (1♂, USNM) .

Comments.

Previously known only from California, Calycomyza barbarensis now appears to be widespread throughout the United States. The narrow, undivided distiphallus is characteristic, as is the dark triangular plate on the hypophallus.

Figures

Figures 452 - 459. Calycomyza barbarensis Spencer, male genitalia 452 ejaculatory apodeme 453 hypandrium and postgonite, ventral 454 hypandrial complex, left lateral 455 phallus, ventral 456 - 459 C. flavinotum (Frick), male genitalia 456 ejaculatory apodeme 457 hypandrium and postgonite, ventral 458 hypandrial complex, left lateral 459 phallus, ventral.