176 SYRPHID.^. 



half of hind pair, and tips broadly of all pairs, of femoi-a, orange ; 

 basal half of fore and hind tibiae and basal three-fourths of middle 

 tibiae, first two joints of anterior tarsi (except tips), yellow. 

 Pubescence of legs practically all yellow ; some tiny black bristles 

 on apical half of under side of bind femora. Wings pale grey, a 

 slight brownisli tinge about the stigmatic region and the " cross- 

 veins '*' ; halteres brownish-yellow. 



Length, 11 mm. 



Described from a single $ , not in good condition, in the Indian 

 Museum. No locality is affixed, but it is certainly from India, 

 and the pale base of the hind femora stamps it as surely a 

 distinct species. But for this latter character, and for the 

 ratiier more produced epistome and the head descending rela- 

 tively rather lower th.an the eyes themselves in profile, this form 

 might be regarded as the $ of qtiadristriatus, Macq. The Hrd 

 abdonunal segment is obviously discoloured in the unique ttipe, and 

 may or may not i-esemble that of quadristriatus, Macq. j 



142. Eristalis angustimarginalis, sp. nov. 



6 5 . Head : eyes closely contiguous for about half the distance 

 from vertex to base of antennae, with dense, short, dark brown 

 pubescence ; vertical triangle small, black, with black hairs ; 

 frontal triangle shining black, in centre with yellowish dust at 

 sides, wholly covered with long black hairs. Pace dull black, with 

 black hairs in centre, grey-dusted and broadly covered at sides with 



Fig. .36. — Eristalis august imarginaUs, sp. nov.,hiiul leg, ^ . 



short yellowish pubescence ; central bump not prominent ; lower 

 part of head descending only slightly either below eyes themselves 

 in profile or forwards, blackish, with very sparse, pale, short 

 pubescence. Antenna? with 1st and 2iid joints black, 3rd dark 

 brown, arista brown, strongly plumose en bas;d two-thirds. Occiput 

 blackish-grey, with slightly silvery margin on lower half in certain 



