80 STRPHID.E. 



around the black moiitli- border. Proboscis blackish-brown. 

 Autennae wholly black, much as in ceneifrons, 3rd joint a little 

 shorter. Anterior edge of autennal protuberance brownish- 

 yellow. Back ot" head ash-grey ; upper posterior orbit of eyes 

 with a fringe of bright yellow scale-like thick hairs, lower ])art of 

 orbit with similar white scaly hairs. Thorax seneous, with pale 

 brownish-yellow hairs ; sides ash-grey with whitish hairs. Scu- 

 telluiu yellowish, with yellow hairs on dorsum and long black 

 hairs in region of posterior border, and soft pendent white hair 

 below. Abdomen ovate, black, 1st segment aeneous, very short ; 

 2nd, 3rd and -Ath segments with a moderately bz'oad yellow band 

 on each, none of the bauds attaining the side margins, all narrowed 

 in the middle, the 1st and 3rd bands practically interrupted there; 

 in fact, the 1st band is really composed of two elongate triangular 

 yellow spots, their apices not contiguous, but connected by a 

 small grey-dusted patch. The 3rd baud is actually interrupted for 

 a very short space, aud in individual specimens might easily 

 resolve itself into two elongate spots ; pubescence of abdomen 

 concolorous with ground-colour, a good deal of white hair laterally 

 at base, and short pubescence along side margins except where 

 the black parts of the abdomen intervene ; venter blackish, the 

 two wider bands duplicated as on the dorsum, pubescence sparser; 

 in certain lights the dorsal abdominal bauds have a creamy shade, 

 especially the 1st band. Legs: coxoe, anterior femora at base, and 

 about basal half of hind femora, black ; tibiae brownish-yellow, tarsi 

 browner blackish-brown, hind pair with golden-brown pubescence 

 below ; femora with pale hair, hind tibife with minute black 

 pubescence on outer side. Wings clear, subcostal cell pale yellow; 

 halteres yellowish-white. 



Length, 10 mm. 



Described from one § from Sadiya, Assam, 28. xi. 1011 

 {Kemp). 



In the Indian Museum. The unique tiipc is now considerably 

 stained, the abdominal markings being indistinguishable. 



64. Syrplius or sua, Walk. 



Syrphus orsua, Walker, lus. Saund,, Dipt, i, p. 231 (1852). 



The type was headless when described and is now in very 

 indifferent condition. A probably conspecific $ from Sumatra in 

 the British Museum is in equally bad condition. 



Head: frons broad at vertex, rapidly widening downwards, 

 seneous-black, with moderately dense black pubescence ; eyes with 

 rather dense dark brown pubescence. Antennae dull black. Face 

 distinctly prominent, apparently dull yellowish- brown, with dark 

 pubescence and a distinct, broad black median stripe ; cheeks 

 apparently dark brown, with a blackish stripe between them aud 

 the face. Post-ocular pubescence yellowish. Thorax ^neon?, 

 with a blackisli tinge, a barely tawny tinge towards sides, on 



