172 SYRPHIU^. 



vein; an ill-defined but obvious yellowish-brown, ratlier narrow 

 suffusion extending from stigma nearly to hind border ; halteres 

 bi'ownisi). 



Lengthy 12 mm. 



Described Irom a 5 ft'om Sikkim (Kni/veU) ; in theliidian Museum. 

 A furry, intriearlus-Yike species, easily recognised by the colours 

 of the abdominal pubescence. E. inb-icar ins has not been recorded 

 from India but might easily occur in the Himalayns. The two 

 species may be differentiated thus. In intricarius the basal half 

 of the tibise is yellowish, the 2i)d abdominal segment wholly black, 

 the epistome distinctly shorter than the heiglit of the eyes. In my 

 new species all the tibiae are wholly black, tlie middle metatarsi 

 quite black ; the ground-colour of the base of the 2nd abdominal 

 segment is grey, and the epistome is fully as long as the height of 

 the eves. 



138. Eristalis solitus, Walk. 



EristaliH solitus. Walker, List Dipt. Brit. Miip. iii, p. (j]9 (1849). 

 Esistalis burhatus, Bigot, Ann. Soc. Eat. France, (5) x, p. 214 (1880). 



(5 2 . Head in S with eyes closely contiguous for a distance 

 about equal to the length of the frons, with rather long, dense, 

 dark brown pubescence ; upper facets much larger than lower 

 ones; lower half of eyes with small brown spots. Vertical 

 triangle moderately large, black, with dark brown and long bright 

 yellow hairs intermixed. Prons black, with blackish-brown, long, 

 thick pubescence; lace black with yellowish dust; a barely 

 perceptible median black line, sometimes absent, and pale yellow, 

 moderately long pubescence which is almost microscopic in the 

 black mouth-region. Extreme front edge of antennal prominence 

 brownish-orange. Antennae black, arista long, feathered on basal 

 half above and below. Occiput and cheeks ash-grey wilh pale 

 yellow pubescence, which is long on under side of head, gradually- 

 dying away at sides of eyes and becoming very long behind vertex. 

 In 5 , frons and face gradually widening from top to bottom, 

 forming rather more than oue-third of head at level of antennae. 

 Erons with dense black or dark brown pubescence ; pubescence of 

 face more w hitish than in S . Thorax blackish-brown ; a moder- 

 jitely broad transverse stripe from side to side along suture, the 

 anterior margin more or less narrowly, the hind margin rather 

 broadly, and thn humeri, greyish. Pleuia? grey, scutellum 

 brownish-yellow, whole dorsum, pleurae and scutellum with long, 

 dense pubescence varying from bright yellow to brownish-yellow ; 

 centre of Sfutellum bearing some black hairs intermixed. Abdomen: 

 ground-colour maitdy black ; 1st segment grey ; 2nd with a pair 

 of very large triangular spots occupying the major part of the 

 surface, including whole of side margins except narrowly behind, 

 their apices near together in the median line but never touching; 

 liind margin of segment also narrowly yellow ; 3rd segment 



