300 THEREVIDJE. 



blackish at tip, microscopically pubescent, with numerous rather 

 short spines ; tarsi darker. Wings nearly clear, veins brownish 

 yellow ; tegulse dirty white ; lialteres brown and yellow. 



Described from a 3 in the Indian Museum from Shillong. 



A second specimen, also from Shillong, 4900 ft., 10-12. x. 1911 

 (Kemp), is identical, except that the abdominal segments have no 

 pale sides, as in the type, but the hind borders of the 2nd segment 

 and onwards are very narrowly yellowish towards each side, and 

 bear thereon some rather long yellowish hairs. 



236. Thereva bilineata, Brim. 



Thereva bilineata, Brunetti, Bee. Ind. Mus. xiii, p. 78 (1917). 



5 . Head with frons at vertex distinctly more than one-third 

 width of head, at level of antennas over half the head ; its upper 

 two-thirds yellowish brown, the rest (with face) ash-grey ; whole 

 frons with scattered black hairs of moderate length ; face wholly 

 covered with long pendent whitish-grey hairs, extending over 

 cheeks and lower part of occiput ; some black hairs below or around 

 mouth ; proboscis reddish brown ; antennae black, first two joints 

 with strong black bristles, 3rd as long as 1st ; vertical triangle barely 

 raised ; a row of rather strong bristles along upper occipital margin, 

 a second row a short distance behind the first. Thorax dark 

 brown, nearly black, with two distinct, yellowish-white, well- 

 separated dorsal stripes from anterior to hind margin and uritmte 

 sparse yellowish pubescence. A row of five powerful spines 

 behind humerus, extending towards wing-base; two supra-alar 

 (postsutural), one post-alar, a large and lesser one on each side 

 margin of scutellum and a pair of apical scutellar decussate nearly 

 perpendicular ones. Pleurae ash-grey, with long whitish-grey 

 pubescence. Scutellum ash-grey, with a large brown spot at base ; 

 hind margin with soft yellow hairs as well as the bristles. Abdomen 

 black; 1st segment grey, with yellow pubescence on hind margin 

 and whitish hairs at sides ; rest of segments wdth distinct ash-grey 

 hind borders, which are narrowest in middle, bearing some yellow 

 or yellowish-white pubescence; sides of 2nd and 3rd segments 

 with whitish hairs; rest of dorsum and at sides with short black 

 pubescence; 7th segment shining chestnut-brown; genitalia the 

 same, marked with yellow, fairly prominent ; venter black, all 

 segments except 1st with well-defined bare hind margins. Legs : 

 femora black, with depressed white pubescence and a short row of 

 bristles in middle of underside ; tibiae brownish yellow, darker at 

 tips ; fore tibiae with three (inner pair wanting), posterior pairs 

 with four rows of strong spines ; tarsi brownish, yellow or dark 

 brown, joints paler at base, shortly pubescent. Wings pale grey, 

 normal ; balteres black. 



Length, 11 1 mm. 



Described from a unique § in the Indian Museum from Theog, 

 Simla Distr., 8000 ft., l.v. 1907 {Annandale). 



This species bears some resemblance to my jlavolineata. 



