LIST OF DIPTERA. 605 



Helophilus hilaris, n. s. Niger, thorace vittis quatuor Jlavis, scu- 

 tello abdomineque fulvis, hoc ferrugineo fasciato, segmentis 2° 

 nigra vittato 3° ferrugineo vittato, pedibus nigris, tarsis interme- 

 diis tibiisque anterioribus basi fulvis, alis subfulvis, apice mar- 

 gineque postico subcinereis. 



Head wanting : chest black, clothed with very short tawny 

 hairs, adorned with four yellow stripes ; scutcheon tawny : breast 

 black, clothed with tawny hairs, adorned with a tawny spot on each 

 side : abdomen obcbnical, bright tawny, much longer and a little 

 broader than the chest : hind borders of the segments adorned with 

 ferruginous bands, which are widened in the middle, and acquire a 

 pitchy colour on each side ; tip black ; second segment adorned 

 with a black stripe ; third segment with a ferruginous stripe : legs 

 black, clothed with short tawny hairs ; middle feet and four front 

 shanks tawny towards the base ; claws and foot-cushions tawny ; 

 tips of claws black ; hind thighs rather thick ; hind shanks slightly 

 curved : wings slightly tawny, pale gray at the tips and along the 

 hind borders ; wing-ribs and veins tawny, the latter pitchy towards 

 the tips ; poisers yellow. Length of the body 5 lines ; of the wings 

 10 lines. 



Helophilus Bengalensis. Eristalis Bengalensis, Wied. ZooL Mag. 

 AW. 16, 22. Auss. Zweif. ii. 167, 21. Macq. Dipt. Exot. ii. 

 63,4. 



a. North Bengal. From Miss Campbell's collection. 



Helophilus fasciatus, Barnston's MSS., fern. Niger, capitis vitta 

 fulva, thoracis vittis quatuor fiavis, scutelli fusci margine fulvo, 

 abdominis fasciis quatuor Jiavis, pedibus fulvis, femoribus basi 

 nigris, tarsis subtus tibiisque ferrugineis, alis subcinereis. 



Body black: head covered with yellow down, clothed with 

 short tawny hairs ; crown beset with a few black hairs ; a shining 

 tawny stripe between the feelers and the mouth : feelers ferruginous, 

 with a pitchy stripe on the upper side ; bristle tawny : eyes pitchy, 

 slightly bronzed ; all the facets very small: chest and breast co- 

 vered with a slight tawny bloom : chest adorned with four yellow 

 stripes ; scutcheon tawny, with a pale brown disk : abdomen slightly 

 decreasing in breadth from the base to the tip, longer, but hardly 

 broader than the chest, adorned with four yellow bands ; first band 

 very broad, especially on each side, quite interrupted in the middle ; 

 second band narrower, almost interrupted ; third and fourth band 

 narrow and entire ; hind borders of the segments ferruginous ; un- 



PART III. 3 H 



