Citrogramma flavigenum, 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 : 140-141

CITROGRAMMA FLAVIGENUM WYATT, 1991

Citrogramma flavigena Wyatt, 1991: 159 . Holotype: ♂, BMNH, by original designation. Type locality: India: Kodaikanal. Wyatt, 1991: 158, 159, figs 5, 16.

Citrogramma flavigenum of Ghorpadé, 1994: 9.

Geographical distribution: India.

Differential diagnosis: Species similar to C. henryi , but without the black macula on genal groove, ventrad to eyes ( Fig. 98 ). Citrogramma flavigenum has gena yellow ( Fig. 4 ), scutellum with a diffuse brownish macula not always present ( Fig. 53 ), metafemur black, and pro- and mesofemur black on basal quarter to third. Citrogramma flavigenum differs from C. pennardsi and C. schlingeri by the angle between eyes, which is under 90° in C. flavigenum ( Fig. 56 ).

Citrogramma flavigenum differs from C. citrinoides by the coloration of pro- and mesofemur, being completely yellow in C. citrinoides . Lunule is yellow in C. citrinoides , but dark in C. flavigenum .

Variation: In his original description, Wyatt (1991) pointed out the brownish macula on facial tubercle that the holotype had. This brown fasciated macula is not always present amongst the material studied here.

Holotype male does not have the brownish macula on scutellum. A specimen from Karnataka does not have the brown macula on scutellum and the metafemur is yellow basally. Citrogramma chola differs by having anterior anepimeron yellow and metafemur yellow on basal third to half (see notes about C. chola ). The Karnataka specimen has anepimeron black, except dorsomedial section yellow like all individuals of C. flavigenum , and it has pro- and mesofemur black basally.

The male deposited at CAS has the yellow fascia on tergum 3 medially divided by a very narrow black vitta forming two maculae. This is the only specimen with this fascia divided that I have studied for the Citrogramma genus, although the lectotype of C. gedehanum is also close to having the yellow fascia divided.

Holotype male deposited in The Natural History Museum, formerly British Museum (Natural History) (London, UK) and labelled: ‘Kodaikanal 7000 ft. /S. India. 23–III–36 ’ ‘B.M. – C.M./Expedn to/S. India. 1936’ [back of the label] ‘HOLO–/TYPE’ [round, red] ‘ HOLOTYPE ♂ of / Citrogramma / flavigenum n. sp. / det. N.P. Wyatt 1989’.

Type locality: India: Tamil Nadu, Dindigul District, Kodaikanal , 2134 m, 10°13′N, 77°28′E .

Material examined: Type material. Holotype, as above.

Nontype material. INDIA: S India, Tamil Nadu, Naduvattam, Nilgiri Hills , 6000 ft, v.1989, P.S.N. ‘ Museum Leiden Collectie Van Doesburg rec. 1973’ [1♂, RMNH]; Karnataka, Nandi Hills, 1467 m, 27.vii.1975, K.D. Ghorpadé No. A207 [2♂, USNM]; South India , Anamalai Hills, Cinchona, 3500 ft, ix.1967, T. R . Susai Nathan [1♂, ZMAN]; Tamil Nadu, Kookal, 2000 m, 19.xi.2006, K.D. Ghorpade D592 [9♂ 2♀, USNM];..., 21.v.2007, K.D. Ghorpadé D645 [1♀, USNM]; Tamil Nadu, Kookal Sholah, 2000 m, 24–25.x.2006, K.D. Ghorpadé D577 [3♂, USNM]; Kerala, Munnar , 2000 m, 23.iii.1977, K.D. Ghorpadé A421 [1♀, USNM]; Tamil Nadu, Ootacamund, 2350 m, 23.x.1975, K.D. Ghorpadé A254 [1♂, USNM]; Tamil Nadu, Longwood Sholah, 1900 m, 26.xi.2003, K.D. Ghorpadé D369 [1♂, USNM]; South India , 8 mi NE Munnar, 6200 ft, 20.iii.1962, E.S. Ross & D.Q. Cavagnaro [1♂, CAS] .

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.

Figures 3–14. 3, Citrogramma amarilla, frontal view of female head. 4, Citrogramma flavigenum, frontal view of male head. 5–7, Citrogramma bicornutum: 5, frontal view of male head; 6, dorsal view of male head; 7, anterodorsal view of female head. 8–10, Citrogramma pennardsi: 8, dorsal view of male abdomen; 9, dorsal view of male head; 10, ventral view of male genitalia (detail). 11–14, Citrogramma sedlacekorum: 11, dorsal view of female abdomen; 12, dorsal view of male head; 13, dorsal view of female head; 14, dorsal view of male abdomen.

Figures 51–62. 51–52, Citrogramma schlingeri: 51, dorsal view of male abdomen; 52, dorsal view of female abdomen. 53, Citrogramma flavigenum, dorsal view of male abdomen. 54–55, Citrogramma sp. 1: 54, dorsal view of female abdomen; 55, wing. 56, C. flavigenum, dorsal view of male head. 57–60, Citrogramma luteopleurum: 57, dorsal view of female head; 58, dorsal view of male head and lateral view of scutum; 59, dorsal view of male abdomen; 60, dorsal view of female abdomen. 61–62, Citrogramma pintada: 61, dorsal view of male abdomen; 62, dorsal view of female abdomen.