Citrogramma undefined-2

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 : 169

CITROGRAMMA SP. 2

Geographical distribution: Papua New Guinea.

Diagnosis: Female very similar to C. pintada , but it has supra-alar area densely yellow pilose ventrally, notopleuron yellow pilose but black pilose posteroventrally ( Fig. 64 ) and abdominal terga 3 and 4 with anterior black fascia narrower than yellow fascia, which is as broad as half tergum length ( Fig. 65 ).

Citrogramma sp. 2 also differs by facial hairs being entirely yellow, and by having a medial broad black vitta on frons reaching ocellar triangle and dividing the yellow area as two isolated lateral vittae ( Fig. 64 ).

Remarks: Female specimen collected in Papua New Guinea, with abdominal yellow fasciae on third to fifth terga not reaching lateral margins ( Fig. 65 ). Compared with C. pintada , her facial pilosity, frons, and scutum pilosity is different and the abdominal yellow fasciae slightly broader, especially the one on tergum 2. Citrogramma sp. 2 has also the pleural pilosity different: entirely yellow except anterior anepimeron black pilose; but this character may be variable.

Material examined: PAPUA NEW GUINEA: Morobe, Wau, Nakata Ridge , 4700 ft, 11.vi.1968, J.W. Boyes [1♀, CNC] .

These three taxa are included in the identification key, although more material is needed to identify them properly. Additionally, Huo studied some material from Tibet that did not match my descriptions (K. Huo pers. comm.). Huo studied Citrogramma specimens collected in Tibet [ CHINA: Tibet, Nyingchi, 26.ix.2008, Chao–Hui Pan (2♂ 1♀, SBSC)], which may key out as C. amarilla , but the female specimen has abdominal tergum 2 with two narrow, elongate yellow maculae. Whether or not these specimens belong to C. amarilla will be discussed in a future paper (K. Huo, unpubl. data).

Figures

Figures 63–75. 63, Citrogramma pintada, dorsal view of male head. 64–65, Citrogramma sp. 2: 64, lateral view of pleuron and dorsal view of female head; 65, dorsal view of female abdomen. 66–69, Citrogramma amarilla: 66, dorsal view of female head; 67, dorsal view of male abdomen; 68, dorsal view of female abdomen; 69, lateral view of female pleuron and head. 70–73, Citrogramma matsumurai: 70, dorsal view of male head; 71, dorsal view of female head; 72, dorsal view of male abdomen; 73, dorsal view of female abdomen. 74–75, Citrogramma clarum: 74, dorsal view of male head; 75, dorsal view of female head.