EIIISTALIS. 1<>*J 



on bas.al half to three-fourtlis. Proboscis black. Occiput blackish, 

 with long brown liairs on upper margin, w hich disappear gradually 

 towards side margins ; lower halt' with bright yellow hairs that 

 gradually lengthen towards under side. Thorax blaclvish, a just 

 perceptible greyish band along suture and traces of another on 

 anterior margin. Dorsum, sides and tlie bright yellow scutellum 

 with dense, long, bright yellowish pubescence. Abdomen a little 

 longer than thorax, bluntly conical ; black with pubescence dense, 

 short, and black except on 1st segment and anterior corners (more 

 or less) of iJnd segment, where it is yellowish ; some yellowish hairs 

 scattered over all the dorsum, and a weak fringe of them on hind 

 margins of :^nd and 3rd segments, which margins may be just per- 

 ceptibly pale. Venter blackish-grey, darker at tip ; pubescence 

 yellowish, black towards tip. Legs black ; anterior knees narrowly 

 antl about basal half of anterior tibias, also middle metatarsi, 

 yellowish. Pubescence of legs generally following ground-colour, 

 but rather long, thick, yellow liair on hind side of anterior femora, 

 and yellowish-brown pubescence on anterior and upper sides of 

 hind femora. Wings yellowish-grey ; stigma indefinitely dark 

 brown ; a lai'ge yellowish-brown suffusion from middle of costa 

 filling about the middle third of the anterior half of the wing 

 and extending broadly and indefinitely along most of the veins; 

 halteres and squamae yellow, latter with yellow fringe. 



Length, 15-18 mm. 



Described from a number of both sexes in the Indian Museum 

 and other collections. 'Sikkxm {Kayvett •, de Niceoille); Darjiling, 

 9000-12,000 ft. (HurluH); Chitlong, Nepal; Naini Tal : Phagu, 

 Simla District, UOOO ft. (Annandah ; Kemp)-, Tolpani, Gahrwal 

 Disivict { Tgller). Apparently common along the Himalayas at 

 about 5,000 ft. and upwards during most of the summer. Origin- 

 ally described by Bigot from India. The name ursiaus was used 

 bv .laerniicke for a Javan species (Abh. Senckenb. Natur. (ies. 

 VI, p. 401, 18G7). 



1."..'). Eristalis albibasis, Big. 



Eristcdis albibasis, liigot, Ann. See. Ent. France, (5) x. p. 215 (1880). 



5 . Head : eyes sparsely pubescent, but with a little, longer, pale 

 yellovvisii hair on lower part and a longitudinal i)and of dense 

 dark brown pubescence as in hinudagensis ; fro)is nearly twice as 

 wide at level of autenna)( where it forms rather more than one-tliird 

 of the bead) as at vertex; moderately dark brovvn, shining, with 

 vertex broadly a little darker, also a not very dislnu-t transv(^rse 

 dai'ker liaiid across middle, all the frons bearing long hlackisli-browu 

 ])ui)escence. Face a little lighter brown, shining, with rather spai-se 

 yellowish hairs, descending diagonally below eyes for a distance 

 e(|ual to about two-tliirds of tlicir height, but only slightly below 

 eyes themselves in profile ; anterior margin slightlv curved, median 

 bump not prominent. Antenna) black, arista plumose for two- 

 thirds of its length. Occiput dark grey, with very narrow silvery 



