Melanagromyza burgessi (Malloch)

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

Melanagromyza burgessi (Malloch)

Figs 269-271

Agromyza burgessi Malloch, 1913a: 323.

Melanagromyza burgessi . Frick 1952: 378 [as synonym M. lappae (Loew)], 1953: 69, 1959: 363; Spencer and Steyskal 1986b: 244; Shi and Gaimari 2015: 14.

Melanagromyza malefica Spencer, 1981: 46. Spencer and Steyskal 1986b [synonymy].

Description.

Wing length 2.7-3.1 mm (♂), 2.9-3.6 mm (♀). Length of ultimate section of vein M4 divided by penultimate section: 0.7. Eye height divided by gena height: 2.2-3.0. Gena strongly angled, highest posteriorly. Fronto-orbital plate and parafacial projecting and conspicuous, obscuring base of antenna (seen laterally) and continuing under eye as cheek; fronto-orbital plate well-developed, setae slightly inset. Clypeus strongly bowed laterally with anterior margin shallowly rounded to slightly truncated medially. Ocellar triangle subshiny and ill-defined.

Chaetotaxy: Four or five ori; two ors. Ocellar setulae short and slightly proclinate, with setulae on posterior 1/3 sometimes reclinate. Orbital setulae short, in three rows, reclinate. Eye bare. Two dorsocentral setae. Acrostichal setulae in ten irregular rows. Three very strong anepisternal setae. Mid tibia with two posteromedial setae.

Colouration: Body, including halter, dark brown in base colour, sometimes with faint blue or greenish shine evident on notum. Parafacial, antenna and gena sometimes paler. Calypter margin and hairs brown. Abdomen with light coppery, greenish, or bluish shine (only coppery observed in this study).

Genitalia: (Figs 269-271 ) Epandrium with small posterodistal spine. Surstylus rounded with short setae along inner-distal margin and shorter tubercle-like setae in two to three irregular rows on inner surface. Metepiphallus very dark with serrated ventral ridges and two stout coalescing lateral ridges. Proepiphallus thick and globular. Basiphallus forming complete ring. Distiphallus separated from phallophorus by ~ 1.5 × length of basiphallus; distiphallus and mesophallus with bases level; distiphallus with long spinulose internal structures and thin distal projection subequal in length to basal section of distiphallus, which is relatively flat and abruptly ending at midpoint (seen ventrally), with only narrow distoventral plate continuing apically. Ejaculatory apodeme well-developed, typical of Melanagromyza , with blade relatively narrow.

Host.

Unknown.

Distribution.

USA: CA, CO, IL, IN, KS, MA, MD*, MI, ND, NY.

Type material.

Holotype [ Melanagromyza burgessi ]: USA. MA: Beverly, 2.vi.1876, Burgess (1♀, USNM; type No. 15685).

Paratypes [ Melanagromyza burgessi ]: USA. ND: Tower City, 5.vi.1906, G.I. Reeves, Webster No. 3122 (2♀, USNM), CO: “Colo”, “1563” (1♀, USNM).

Holotype [maelifica]: USA. CA: San Diego Co., La Mesa, 23.iii.1962, P.A. Rude (1♂, CAS). [Not examined]

Additional material examined.

USA. IN: Lafayette , “v-20”, swept from wint. wheat (1♀, USNM), Evansville, 7.v.1914, swept from wint. wheat, J.M. Aldrich (1♀, USNM), KS: Manhattan, 4.v.1932, D.A. Wilbur (1♀, USNM), Manhattan, C.W. Sabrosky, 20.iv.1934 (3♂, USNM), 25.iv.1934 (1♀, USNM), MD: Montgomery Co., 4mi SW of Ashton, 27.v.1984, G.F. and J.F. Hevel (1♂, USNM), Bethseda , 3.vi.1972, G.C. Steyskal (1♀, USNM), MI: St. Joseph, 30.v.1938, C.W. Sabrosky (1♂, USNM) .

Figures

Figures 269 - 271. Melanagromyza burgessi (Malloch), male genitalia 269 phallus and proepiphallus, ventral 270 hypandrial complex, left lateral 271 hypandrium, ventral.