Citrogramma citrinoides, WYATT, 1991

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 : 134

CITROGRAMMA CITRINOIDES WYATT, 1991

Citrogramma citrinoides Wyatt, 1991: 158 . Holotype: ♂, BMNH, by original designation. Type locality: Malaysia: Mt Jasar. Wyatt, 1991: 158, figs 6 and 14.

Syrphus variscutatus of Curran, 1928 (in part).

Geographical distribution: Malay Peninsula (Pahang), Hainan.

Differential diagnosis: Distinct species only known from male specimens. Face yellow, lunule yellow, scutellum yellow, metafemur black and pro- and mesofemur yellow. Very similar to C. flavigenum but C. flavigenum with lunule black, brown macula on facial tubercle, and pro- and mesofemur black basally; both species yellow pilose on notopleuron and on supra-alar area, but C. citrinoides has little black hairs. Citrogramma flavigenum is only known from southern India.

Remarks: Little variation was found in the type series and nontype material. The most evident is tergum 3 usually with a yellow fascia with parallel margins, but some specimens have this fascia slightly emarginate posteromedially ( Fig. 90 ). After the study of the type material, I realised that some individuals have pro- and mesofemur with a posterobasal brownish area, but entirely yellow anterobasally. This only posterior diffuse macula is very distinct from the other character state used in couplet 40 of the key: pro- and mesofemur black basally.

A male was found labelled as paratype and not noted in the original description ( Malaysia, Pahang, Cameron Highlands , 5000–5500 ft, 12.vi.1935, H.M. Pendlebury, BMNH). The paratype male collected on 22.ix.1938 has a head glued on of a different syrphid genus, Allograpta Osten Sacken, 1875 .

As mentioned by Wyatt (1991), there are some individuals that were identified as paratype or paralectotype of C. variscutatum ( Curran, 1928) . They are placed in the nontype material.

Holotype male deposited in The Natural History Museum , formerly British Museum ( Natural History ) (London, UK) and labelled: ‘PAHANG, F.M. S./ Cameron Highlands / G. Jasar 5500 ft./ 25–6 –193 5 ’ ‘ H.M. Pendlebury. / Coll. / F.M.S. Museums. ’ [back of the label] ‘ Ex F.M.S. / Museum. /B.M. 1955–354’ ‘ HOLO –/TYPE’ [round red label] ‘ HOLOTYPE ♂ of / Citrogramma / citrinoides n. sp. /det. N.P. Wyatt 19 89 ’ [1♂, BMNH] .

Type locality: Malaysia: Pahang, Cameron Highlands, Mount Jasar , 1676 m, 4°30′N, 101°30′E .

Material examined: Type material. Holotype, as above. Paratypes. MALAYSIA: Pahang, Cameron Highlands, 4800 ft, 26.vi.1935, H.M. Pendlebury [1♂, BMNH] ;..., 5000–5500 ft, 12.vi.1935,... [1♂, BMNH] ;..., 4000–4500 ft, 21.vi.1935,... [1♂, BMNH]; Pahang, Cameron Highlands, Mount Jasar , 5500 ft, 25.vi.1935, H.M. Pendlebury [3♂, BMNH] ;..., 5565 ft, 13.xii.1939,... [1♂, BMNH] ;..., 5565 ft, 22.ix.1938,... [1♂, BMNH] ;..., 5565 ft, 19.v.1939,... [1♂, BMNH]; Pahang, Fraser’s Hill, Fine Tree Hill , 4600 ft, 3.ix.1933, H.M. Pendlebury [1♂, BMNH] .

Nontype material. MALAYSIA: Pahang, Mount Tahan , 6500–7100 ft, 13.xii.1921, H.M. Pendlebury [1♂, BMNH];... ‘ Paratype Syrphus variscutatus Curran’ [2♂, BMNH];..., 12.xii.1921,... ‘ Paratype Syrphus variscutatus Curran’ [1♂, BMNH];..., 14.xii.1921,... ‘ Paratype Syrphus variscutatus Curran’ [1♂, BMNH];..., Seat Point, 5460 ft, 17.i.1923, H.M. Pendlebury ‘ Paratype Syrphus variscutatus Curran’ [1♂, BMNH];..., Seat Point, 5960 ft, 3.i.1923, H.M. Pendlebury [1♂, BMNH] ; Pahang, Cameron Highlands , 4800–5500 ft, 8.vi.1935, H.M. Pendlebury [1♂, BMNH] ; Pahang, Fraser’s Hill , 4200 ft, 7.vii.1931, H.M. Pendlebury [1♂, AMNH] ; Pahang, Gunung Kechan , 6300 ft, 23.i.1923, H.M. Pendlebury ‘ Paratype Syrphus variscutatus Curran’ [1♂, AMNH] ; Pahang, Brinchang , 34.xi– 2.xii.1977, B. Bendell [1♂, CNC] ; CHINA: Hainan, Ledong County, jianfengling, 16.xi.2006, Ke – Ke Huo [2♂, SBSC] (Huo, unpubl. data) .

Figures

Figures 88–99. 88–89, Citrogramma citrinum: 88, lateral view of male head and pleuron; 89, dorsal view of female abdomen. 90, Citrogramma citrinoides, dorsal view of male abdomen. 91–92, Citrogramma henryi: 91, dorsal view of male abdomen; 92, dorsal view of female abdomen. 93, Citrogramma variscutatum, dorsal view of male abdomen. 94, C. citrinoides, frontal view of male head. 95, Citrogramma currani, dorsal view of male head. 96, C. variscutatum, lateral view of male head. 97, C. currani, anterodorsal view of female head. 98, C. henryi, lateral view of male head. 99, C. currani, lateral view of female head.