TlILltEVA. 299 



Described from a perfect unique c? in the Indian Museum from 

 ShilloDg, Assam, 5500 to G400 it., 29. viii-5. ix. 1015 {Kemp). 



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

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



234. Thereva nigella, Wied. 



Thereva nicjella^ Wiedemaun, Aiiss. Zweifl. i, p. 232 (1828). 



$. " Antenuse blackish, in certain lights whitish. Epistome, 

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

 shimmer. The rather I'ubbed thorax shows faint traces of stripes ; 

 the side margins broadly whitisli. Abdomen with some white 

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

 quite clear ; halteres brown, witli white knobs. Legs blackish, 

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

 Tranquebar. Length 4^ lines." {Wiedemann ?) 



235. Thereva flavolineata, Brun. 



Thereva Jlavolineata, 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 antennse and with long greyish hairs below them ; antennae 

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

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

 eyes with black hairs. TJiorax dark brown, w^ith two well-separated, 

 iiioderately 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 yellowioh, 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 « idely so on 3rd and 4th ; 1st 

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

 tiie sides), 5tli at base, black ; dorsum of abdomen with black 

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

 with moderately long whitish-yellow hairs : ])Osterior 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 brownisli 

 hairs on upper, and whitish hairs on lower parts. Leijs (hind })air 

 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 ; tibiae reddish yellow. 



