Citrogramma bicornutum, VOCKEROTH, 1969

Mengual, Ximo, 2012, The flower fly genus Citrogramma Vockeroth (Diptera: Syrphidae): illustrated revision with descriptions of new species, Zoological Journal of the Linnean Society 164 (1), pp. 99-172 : 130-131

CITROGRAMMA BICORNUTUM VOCKEROTH, 1969

Citrogramma bicornutum Vockeroth, 1969: 98 . Holotype: ♂, BPBM, by original designation. Type locality: Papua New Guinea: Daulo Pass. Vockeroth, 1969: 98, fig. 95. Thompson & Vockeroth, 1989: 442; Wyatt, 1991: 155, 156.

Geographical distribution: New Guinea.

Differential diagnosis: Very distinct species with a medial black facial vitta, cell BM bare on basal half, and abdominal terga 3 and 4 each with a narrow yellow fascia ( Figs 15, 16 ). Similar to C. asombrosum , but they differ in male genitalia, abdominal pattern ( C. asombrosum has a broad yellow fascia on terga 3 and 4) and geographical distribution ( C. asombrosum is only known from New Caledonia).

Holotype male deposited in the Bernice P. Bishop Museum (Honolulu, Hawaii, USA) and labelled: ‘NEW GUINEA: NE,/Daulo Pass,/ 2500 m, V–2–1959 ’ ‘C.D. Michener/Collector/BISHOP’ ‘ HOLOTYPE / Citrogramma / bicornutum / Vockeroth ’ [red, handwritten except first line].

Type locality: Papua New Guinea: Eastern Highlands Province, Daulo District, Daulo Pass , 2500 m, 6°01′S, 145°12′E .

Material examined: Type material. Holotype, as above. Paratypes. PAPUA NEW GUINEA: (NE) Morobe Province, Wau, 1200 m, 5.x.1962, J. Sedlacek, Malaise trap [1♂ 1♀, BPBM]; (NE) 6 km W of Wau, Nami Creek , 1700 m, 15.vi.1962, Malaise trap, J. Sedlacek [1♀, BPBM] .

Figures

Figures 15–26. Dorsal view of abdomen. 15–16, Citrogramma bicornutum: 15, female; 16, male. 17, Citrogramma asombrosum, male. 18–19, Citrogramma quadratum: 18, male; 19, female. 20–21, Citrogramma arisanicum: 20, male; 21, female. 22, Citrogramma australe, male. 23–24, Citrogramma notiale: 22, female; 24, male. 25–26, Citrogramma robertsi: 25, female; 26, male.