Citrogramma hervebazini, (CURRAN, 1928)

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 : 147

CITROGRAMMA HERVEBAZINI ( CURRAN, 1928)

Syrphus hervebazini Curran, 1928: 207 . Lectotype: ♂, BMNH, designated by Wyatt (1991) Type locality: Malaysia: Camerons Highlands, Rhododendron Hill. Curran, 1928: 199 , 207, 1931a: 313.

Syrphus circumdatus of Curran, 1928 (in part); Knutson et al., 1975 (in part).

Citrogramma hervebazini of Vockeroth, 1969: 95, fig. 7; Knutson et al., 1975: 311; Wyatt, 1991: 155, 157, 164.

Geographical distribution: Malay Peninsula (Pahang), Borneo ( Sarawak).

Differential diagnosis: Peculiar species with yellow gena, broad black facial vitta, scutellum with a medial triangular black macula ( Fig. 29 ), pro- and mesotibia yellow (brownish distally and basally), and large male genitalia with surstylus bearing long tufts of hairs. An interesting character is the black halter capitulum (see Figs 29 , 41 ). Citrogramma hervebazini keys near C. solomonense but they are quite distinct as noted in the identification key.

Citrogramma hervebazini has similar male genitalia to the one of C. shirakii , but they have significant morphological differences. Citrogramma hervebazini has yellow face with black medial vitta, scutellum with black macula, metafemur black, and halter capitulum black. Although male genitalia are similar in shape, C. hervebazini ’s genitalia are larger, having broader protuberance of the surstylus and larger superior lobes (see Figs 151, 152 ).

Remarks: This taxon was designated the type species of the genus Citrogramma by Vockeroth (1969: 95). Curran (1928) based his new species C. hervebazini on four males but he did not designate a holotype. Wyatt (1991) studied three of these four males, and designated a lectotype and paralectotypes. The fourth male studied by Curran is deposited at the AMNH and included here as a paralectotype.

Lectotype male deposited in The Natural History Museum, formerly British Museum (Natural History) (London, UK) and labelled: ‘PAHANG, F.M.S./ ‘Cameron’s High–/lands.’/ Rhododendron Hill ft./ 5200 14 th June, 1923/H.M. Pendlebury’ ‘Pres. by/Fed. Malay States/Museum./B.M. 1934–74’ ‘TYPE/ Syrphus / hervebazini /No. Curran ’ [red, handwritten by Curran] ‘LECTO–/TYPE’ [round, violet] ‘ LECTOTYPE ♂ of / Syrphus / hervebazini Curran /det. N.P. Wyatt 19 89 ’.

Type locality: Malaysia: Pahang, Cameron Highlands , Rhododendron Hill, 1585 m, 4°30′N, 101°27′E .

Material examined: Type material. Lectotype, as above. Paralectotypes. MALAYSIA: Pahang, Cameron Highlands , Rhododendron Hill , 5200 ft, 18.vi.1923, H.M. Pendlebury [2♂, BMNH];..., 14.vi.1923, H.M. Pendlebury [1♂, AMNH] .

Nontype material. MALAYSIA: Sarawak, Mt Dulit, moss forest, 4000 ft, 22.x.1932, native collected, Oxford Univ. Exp. B.M. Hobby & A.W. Moore, B.M. 1933–254 [1♂, CNC]; Sarawak, Mt Dulit , moss forest, 4000 ft, 14.x.1932, native collected, Oxford Univ. Exp. B.M. Hobby & A.W. Moore, B.M. 1933–254 [3♂, BMNH]; B.N. Borneo, Mt Kinabalu , Kamborangah, 7000 ft, 30.iii.1929, H.M. Pendlebury [1♀, BMNH] .

Figures

Figures 27–38. 27–28, Citrogramma robertsi: 27, dorsal view of male head; 28, dorsal view of female head. 29, Citrogramma hervebazini, dorsal view of male abdomen. 30, Citrogramma vockerothi, dorsal view of male abdomen. 31, Citrogramma solomonense, lateral view of male pleuron. 32, C. vockerothi, lateral view of male pleuron and head. 33–37, Citrogramma circumdatum: 33, dorsal view of male abdomen; 34, dorsal view of female abdomen; 35, lateral view of male pleuron; 36, dorsolateral view of female scutum and pleuron; 37, dorsal view of female head; 38, C. solomonense, lateral view of male head.

Figures 39–50. 39–40, Citrogramma solomonense: 39, dorsal view of male abdomen; 40, dorsal view of female abdomen. 41, Citrogramma hervebazini, dorsal view of female abdomen. 42–44, Citrogramma quadricornutum: 42, dorsal view of male abdomen; 43, dorsal view of female abdomen; 44, dorsal view of male scutum and scutellum. 45, Citrogramma fumipenne, dorsal view of male abdomen. 46–49. Citrogramma luteifrons: 46, dorsal view of female head; 47, dorsal view of male abdomen; 48, lateral view of male pleuron and head; 49, dorsal view of female abdomen. 50, Citrogramma schlingeri, dorsal view of male head.

Figures 151–153. Male genitalia. 151, Citrogramma hervebazini (from Vockeroth, 1969): a, left lateral view, surstylus outlined only; b, superior lobe, lateral, outline only; c, sternum 9, superior lobes and aedeagal base, ventral view; d, left surstylus, lateral view. 152, Citrogramma shirakii, left lateral view. 153, Citrogramma quadricornutum (from Vockeroth, 1969): a, left lateral view (sternum 9 mostly hidden); b, superior lobe, lateral, outline only; c, sternum 9 and genitalia, left lateral view; d, tergum 9 and cerci, dorsal view; e, sternum 9, superior lobes and aedeagal base, ventral view; f, right surstylus, lateral view.