S2 SYEPHID^. 



with narrow ( J ) or broad ( $ ) black hind margins, each suc- 

 cessively wider, those on 3rd and 4th segments in $ reaching to 

 middle of segments, a narrow indefinite median black line 

 on 2nd segment. Hind margins of 4th segment narrowly 

 shining yellowish in S , more broadly aeneous in § ; 5th segment 

 all shining black. Pubescence bright yellow on 2ud segment 

 towards sides, shorter and paler in middle ot" segment ; whitish 

 on yellow |3arts of rest of abdomen, black on black parts. On 

 side mai'gins of abdomen, pubescence all yellowish except for 

 some black hairs ^here the black bands occur. Venter blackifeh, 

 with a little short pale hair. Legs orange ; apical half of hind 

 femora, and remainder of hind legs black ; anterior tarsi brownish 

 towards tips ; pubescence following gi'ound-colour. Winr/s quite 

 clear; stigma brownish-yellow; halteres brownish-orange; 

 squamae yellowish with long, soft bright yellow fringe. 



Length, 12 mm. 



Described from a single S in the Indian Museum, from 

 Ivalimpong, Darjiling District, 600-4500 ft., 24. iv.-lO. v. 1915 

 (Graveh/), and a single 2 from the Pusa collection, Shillong, 

 5000 ft, 17. ix. (Fletcher). 



Type (S in Indian Museum, $ sent to British Museum by 

 Mr. T. B. Fletcher. 



66. Syrphiis balteatiis, De Geer. (PL I, figs. 19, 20.) 



Musca balteata, De Geer, Mem. Insectes, vi, p. 116 (1776). 



Musca canahhia^ Scopoli, Ent. Caro.p. 314 (1763). 



Musca scitti/uf!, Harris, Expos. Engl. Ins. p. 105, pi. xxxii, fig. 33 



and {scitide), p. Ill, pi. xxxiii, fig. 55 (1776). 

 Musca cdternatus, Schrank, Enum. Ins. p. 448 (1781). 

 Musca nectareus, Fabricius, Mant. Ins. ii, p. 341 (1787). 

 Syrjjhus halteatus, de Meijere, Tijd. v. Ent. li, p. 297 (1908). 

 Syrphus v{ridau7-eus, Wiedemann, Anal. Ent. p. 35 (1824). 

 SyrpMis nectarinus, Wiedemann, Anss. Zweifl. ii, p. 128 (1830). 

 Syrphus alternans, Macquart, Dipt. Exot. ii, 2, p. 89 (1842). 

 Syrphis triligatus, Walker, Proc. Linn. Soc. Lond. i, p. 19 (1856). 



S 2 . Head : eyes bare, contiguous in ^ for a short distance ; 

 "vertical triangle in d" more or less greyish-black with black hairs ; 

 frontal triangle yellow-dusted with yellow hairs. Face in 6 

 orange, \\\t\\ gre)'' dust and pale pubescence, or with pnle 

 yellowish tomentum and concolorous pubescence ; central bump 

 yellow, bare ; cheeks sometimes blacldsh near lower corners of 

 eyes. Frons in $ rapidly broadening from vertex to base 

 of antennae, twice as wide below as at vertex, aeneous or greyish- 

 yellow, covered with pale yellow dust and a little whitish 

 pubescence on lower part ; generally with an indistinct dark 

 middle line; ocellar triangle blackish. Autennal prominence 

 duller yellow, translucent, bare shining, with a small black dot 

 above base of each antenna. Thorax shining aeneous wdth two 

 greyish stripes ou fore part, and an indefinite, very narrow 

 median one ; pubescence yellowy erect, fairly abundant, not 

 conspicuous ; humeral region, mesopleura and front part of 



