XANTHOGKAMMA. — ISCHIODON. 97 



Described from two d 6 a,nd two 2 2 in the Indian Museum 

 and one cf in the Pusa collection. Mangaldai, Assam-Bhutan 

 Frontier, l!6.xii. 1910, (i/pe ^ {Kemp) ; Ukhral, Manipur, 6400 ft., 

 viii. 190S (Pettigreiv) ; Sadiya, Assam ; Ghumti, Darjiling District, 

 4000 ft., vii. 1911, type $ (Gravehj) ; Sidapur, Coorg, S. India, 

 8000 ft., 15. iii. 1917. An additional c? from Janakmukh (Abor 

 Expedition), 600 ft., 18. xii. 1911 (Kimj)), in the Indian Museum, 

 has a shining blackish-brown triangle over the antennae, a distinct, 

 similarly coloured stripe on the face from the root of the antennae 

 to the mouth, and the hind legs all blackish-brown. It may 

 possibly represent a different species. 



Genus ISCHIODON, SacJc. 



Ischiodon, Sack, Ent. Mitt, ii, p. o (1913). 



Genotype, Spluvrophoria scutellaris, F. ; as trocJiaaterica, sp. nov. 



Tlie principal character distinguishing this genus is the presence 

 of an almost stick-like slender tooth on the under side of the hind 

 trochanters. In all other respects the characters are those of 

 SpluHi'ophoria. It is strange that this fact has not been noticed 

 before, considering the wide distribution and abundance of the 

 species. These processes are present in both sexes. But though 

 the genus is a good one, Sack's supposed new species is certainly 

 synonymous with scutellaris. 



'il . Ischiodon scutellaris, Fahr. 



Scceia Scutellaria, Fabriciiis, Syst. Antl. p. 252 (1805). 

 Sy7-phi/s Scutellaria, Wiedemann, Auss. Zweifl. ii, p. 130 (1830). 

 Sphcerophoria scutellaris, de Meijere, Tijd. v. Ent. li, p. 288, S 2 



redescr. (1908) ; id., op. cit. Ivii, p. 164 (1914) ; Erunetti, Kec. 



Ind. Mus. xi, p. 217 (1915). 

 Syrphns ccf/i/ptius, Wiedemann, Auss. Zweifl. ii, p. 133 (1830). 

 Si/rphus coronuindelensis, Macquart, Dipt. Exot. li, 2, p. 89 (1842). 

 Si/rp/ius loiKjicornis, id., t. c. p. 94, pi. xvi, tip-. 5 (1842). 

 Sijrphusfuxcotibialis, id., t. c. p. 94, pi. xvi, tifj-. 4 (1842). 

 SyrpJius nasutus, id., t. c. p. 9(), pi. xvi, tig'. (! (1842). 

 iSyrphus natale)ms, id., op. cit. Hiippl. i. p. I."i4 (1846). 

 iSijrplins splendeiis, Doleschall, Nat. Tijil. Ned. lud. x, p. 410, pi. i, 



fiir. 3 (1856). 

 Syrphus hrachypterus, Thomson, Eiigeii. Resa, Dipt. p. 496 (1869). 

 Syrp/ius en/thrupi/yus, IJigot. Ann. .Soc. Ent. France, (6) iv, p. 611 



(1H84,. ■ 

 Syrphus pfeifferi, Higfot, Ann. Soc. Ent. Franco, (6) iv, p. 89 (1884). 

 Melithreptus iioLcc-r/uinca;, Kert^sz, Term. Fiizet. xxii, p. 178, fi'". 3 



(189!)). 

 Ischiodon trochantcrica, Sack, Ent. Mitt. (Deri.) ii, p. 6 (1913). 

 " Syrp/iidjly," Ind. Ins. Life, pi. Ixiv. ; Suntli Ind. Iny., pi. iv. 



c? 2 . I/ead : in (S , eyes contiguous for barely half the distance 

 from frons to tlie l)lack isosceles vertical triangle, which is black 

 with a little blackish pubescence ; only tlie most frontal facets are 

 larger than the rest; frons and face bright sulphur-yellow, latter 



n 



