Citrogramma fascipleurum (Curran, 1931)

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 : 140

CITROGRAMMA FASCIPLEURUM (CURRAN, 1931)

Syrphus fascipleura Curran, 1931b: 352 . Holotype: ♂, BMNH, by original designation. Type locality: Malaysia: Mt Kinabalu. Curran, 1931a: 313, 1931b: 352.

Citrogramma fascipleura of Knutson et al., 1975: 311; Wyatt, 1991: 155, 158.

Citrogramma difficile of Wyatt, 1991 (in part).

Geographical distribution: Borneo.

Differential diagnosis: Citrogramma fascipleurum has a shaped triangular black macula on scutellum, pro- and mesofemur entirely yellow and metafemur black; it is very similar to C. gedehanum and C. difficile . Differences with C. gedehanum and C. difficile are few: facial and notopleural pilosity black, and posterior anepimeron yellow in males. The females of C. fascipleurum have yellow lunule and the posterior anepimeron is yellow ( Fig. 110 ). The distribution of C. fascipleurum overlaps with that of C. difficile .

Remarks: Holotype is not in very good condition with abdomen glued to a label and right wing broken. The female from Mt Dulit, previously identified as C. difficile ( Wyatt, 1991) , is here identified as C. fascipleurum because both specimens share the same pleuron pattern with anepimeron yellow except a dorsal black macula on anterior section. The other morphological character that distinguishes them from C. difficile is the presence of black hairs on notopleuron.

Holotype male deposited in The Natural History Museum, formerly British Museum (Natural History) (London, UK) and labelled: ‘Holo–/type’ [round, red border] ‘ Syrphus ♂ /TYPE/ fascipleurum / Curran / No.’ [red] ‘B.N. BORNEO,/Mt Kinabalu,/Kenokok,/ 3.300 ft. / 22 Apr. 1929.’ ‘Pres. by/Fed. Malay States/ Museum. /B.M. 1934–74’ ‘ Syrphus / fascipleurum / Curran /Det./C.H. Curran’ ‘ Citrogramma / fascipleurum ♂ / (Curran) /K.D. Ghorpade det. 197 9 ’.

Type locality: Malaysia: Sabah (in Borneo), Mount Kinabalu, Kenokok , 1006 m, 6°04′N, 116°33′E .

Material examined: Type material. Holotype, as above.

Nontype material. MALAYSIA: Sarawak, Mt Dulit , moss forest, 4000 ft, B.M. Hobby & A.W. Moore [1♀, BMNH] .

Figures

Figures 100–111. 100, Citrogramma variscutatum, dorsal view of female abdomen. 101–102, Citrogramma currani: 101, dorsal view of male abdomen; 102, dorsal view of female abdomen. 103–106, Citrogramma wyatti: 103, dorsal view of male abdomen; 104, dorsal view of female abdomen; 105, anterodorsal view of male head; 106, dorsal view of female head. 107, Citrogramma fascipleurum, anterodorsal view of female head. 108–109, Citrogramma difficile: 108, frontal view of male head; 109, dorsal view of female head. 110, C. fascipleurum, lateral view of female pleuron and head. 111, C. difficile, dorsal view of head, scutum and scutellum.