TULKEVA. 299 



Described from a perfect unique d in the Indian Museum from 

 Shillong, Assam, 5500 to 6400 ft., 29.viii-5.ix.1915 {Kemp). 



A Aery beautiful species, unlike any other Indian form; it must 

 bear considerable resemblance to T. fulva, Mg., of Europe. 



234. Thereva nigella, Wied. 



Thereva nigella, Wiedemann, Auss. Zweifl. i, p. 232 (1828). 



§. "Antennas blackish, in certain lights whitish. Epistome, 

 beard, and moustache white ; frons and back of head with a white 

 shimmer. The rather rubbed thorax shows faint traces of stripes ; 

 the side margins broadly whitish. Abdomen with some white 

 hairs on the side margins, the segments hardly whitish. Wings 

 quite clear ; haiteres brown, with white knobs. Legs blackish, 

 with short white hairs. Type in Westermann's collection. 

 Tranquebar. Length 4^ lines." {Wiedemann) 



235. Thereva flavolineata, Brim. 



Thereva flavolineata, Brunetti, Rec. Ind. Mus. vii, p. 480 (1912). 



Head: frons small, black, with black hairs; ocelli red; eye- 

 facets larger in front ; face grey, with long stiff black hairs above 

 the antennas and with long greyish hairs below them ; antenna? 

 black, microscopically grey-dusted; oral orifice reddish yellow; back 

 of head dead grey, with greyish hairs ; vertex and upper border of 

 eyes with black hairs. Thorax dark brown, with two well-separated, 

 moderately wide, chrome-yellow stripes ; dorsum covered with 

 mixed brown and yellow hairs, the former mainly on the darker 

 parts ; sides of thorax blackish grey in front of wings, ashy grey 

 on lower part, with shaggy dirty white hairs in front of and below 

 shoulders, and in front of wing-base; some yellow hairs above 

 insertion of wings. A row of three bristles between the humerus 

 and transverse suture, two supra-alar bristles (others possibly 

 broken off). Scutellum yellowish, with a brownish basal triangle, 

 dorsum with brown and grey hairs ; two preapical well-separated 

 bristles. Abdomen blackish grey, posterior margins of segments 

 very narrowly yellow, but more widely so on 3rd and 4th; 1st 

 segment wholly, 2nd, 3rd, and 4th wholly (except posteriorly at 

 the sides), 5th at base, black; dorsum of abdomen with black 

 hairs, which are thickest and longest on the black parts ; sides 

 with moderately long whitish-yellow hairs ; posterior margins 

 of segments with very short, similarly coloured hairs. Venter 

 bluish grey, posterior margins of segments more broadly yellow, 

 especially on 3rd and 4th segments ; the whole surface with soft 

 white hairs. Genitalia distinct, shining brown, with brownish 

 hairs on upper, and whitish hairs on lower parts. Legs (hind pair 

 wanting) : coxae and femora blackish grey, the former with long 

 greyish-white hairs in front; the latter with grey hairs below on 

 proximal half, blacker hairs on discal half ; tibia? reddish yellow, 



