ERISTALIS. l'!5 



9. Head: eyes bare; frons Jind face enclosed by two straight 

 but gradually diverging lities h'oni vertoN: to inoutli-opening ; irons 

 rather less than one-third of head at base of antennae, covered, as 

 is face also, with brownislt-yellow tomentum, former bearing 

 brown hairs, latter with yellowish pubescence; vertex with black 

 hairs; face only moderately produced ; central bump distinct but 

 small, brownish-yellow, bare ; mouth region nearly bare ; head 

 barely perceptibly produced below eyes themselves in prolile. 

 Antenna) and arista orange-brown, latter bare. Occiput blackish- 

 grey with a little pale pubescence, upper n)argin with short black 

 pubescence, lower one with a little, longer, whitish ])ubescence. 

 Thorax: dorsum yellowish-gi-ey tomentose, with four longitudinal 

 shining black stripes from anterior to posterior margin, of about 

 equal width and nearlv equidistant, the two median ones nearer 

 together and sometimes practicnlly united. Sides of thorax 

 nntderately shining black ; mesopleura and upper part of sterno- 

 pleura grey-dusted. Scutellum brownish-yellow, a little darker at 

 base, with yellow pubescence and black hairs basally. Abdomen dull 

 black ; 1st segment pale yellowish ; 2nd with a broad brownish- 

 yellow band on anterior margin, very much contracted behind in 

 middle, widened at sides, nearly filling side margins except on hind 

 corner of segment : hind margin of segment shining black ; .'3rd 

 and 4th segments diill black, the hind margins with a very shining 

 black band, broadest in midtUe; on eiich of these segments is a 

 rather large, approximately oval, yellowish-grey spot on each side, 

 diagonally placed ; upper end of each spot on anterior margin, lower 

 end nearly reaching middle of side margin ; oth segment a small 

 replica of •'Jrd and 4th. Pubescence of abdomen pale yellowish-grey ; 

 venter mainly yellowish with pale yellowish pubescence. Lejjs 

 black ; tips of femora rather narrowly, basal half of fore, a 

 little more than half of middle and hind tibife rather broadly at 

 base, yellowish; ist and 2nd tarsal joints yellowish or brownish- 

 yellow, remainder black. Pubescence of legs rather short, uni- 

 formly yellowish except on front side of hind tibia^, where it is 

 black. Winrfs quite clear except a little yellowish at base ; stigma 

 almost imperceptible, but with a minute elongate brown mark at 

 inner and outer ends ; halteres yellowish. 



Lewjlh, 8-10 mm. 



Described from a few indifferent examples in the Indian .Museum 

 from Calcutta, 27.iv.]{)16; :-50.v.l914; S.vi.lOO"; snlt lakes 

 near Calcutta, on Avicei)nla blossoms, 30. v. 1914 {Graiwlif) ; 

 Sunderbunds, 21. viii. 1909 (JniJcins) ; Coimbatore. S. India, 

 25.i. 19lu. De Meijere I'ecords a <S from Java, and states that 

 it is exceedingly like the c? of arvonnn. Ti/pes ( cT $ ) from 

 Bengal, in Wiedemann's anrl Westermann's collections. 



1:^2. Eristalis laetus, IVud. (PI. 1\', iig. 2.) 



Eridalix lulus, Wiedemaun, Aiiss. Zweifh ii, p. 19i' (18:10). 



S $ • IT^'od : in c? eyes contiguous for a very short space, 

 perhaps one-tifth of distance from vertex to base of antenna*, dark 



