Citrogramma flavigenum Wyatt 1991
Creators: name: Mengual, Ximo
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Citrogramma
Citrogramma flavigenum

description: 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].
description: Published as part of Mengual, Ximo, 2012, The flower fly genus Citrogramma Vockeroth (Diptera: Syrphidae): illustrated revision with descriptions of new species, pp. 99-172 in Zoological Journal of the Linnean Society 164 (1) on pages 140-141, DOI: 10.1111/j.1096-3642.2011.00750.x, http://zenodo.org/record/5406153