1917-] E. Brunetti : Diptera of the Simla District. 87 



side with their congeners. Only five species can be definitely 

 identified from Simla. 



Eristalis tenax, L. 



This world-wide species is probably to be found all through 

 the summer months, occurring freely at all the Himalayan places 

 of resort. The dates of the specimens before me are Phagu, 

 18 — 21-V-16 {N . Annandale and 5. Kemp) ; Simla, 12 — 13-V-13 

 [N. Annandale), and Matiana. 



Eristalis himalayanus, Brun. 



E. ifi'si'iins, Big., preocc. jaen. 



One 9 from Phagu, 18 — 2r-v-i6 {N. Annandale and 5. 

 KemP). 



Eristalis solitus, Walk. 



Simla, 12— 13-V-13 (A^. Annandale) ; Kasauli, 6,300 ft., 15-V-08 

 {N. Annandale). 



This species is apparently found all along the 5,000 to 9,000 

 ft. level of the Himalayas, being common at Darjiling, Mussoorie 

 and Naini Tal. It extends through the East apparently, as I 

 took specimens in Yokohama in May 1906, and Dr. Annandale 

 found it at Otsu near K^^oto in October 1915. The transverse light 

 and dark bands on the thorax are less distinct in the 9 than the 

 cf , being sometimes almost indistinguishable ; the abdominal 

 bands are often pinkish, the 2nd (overlapping hind margin of 2nd 

 and base of 3rd segment) sometimes comparatively broad, occasion- 

 ally nearly as broad as the ist band. The eyes are rather densely 

 pubescent, the hair being brown above and whitish on their lower 

 part ; the arista long plumose for half its length, on both sides, there 

 generally being two or three hairs more on the lower side. 



Eristalis albibasis, Big. 



One 9 , Simla, 16-V-09 {N. Annandale) , agrees perfectly with 

 Bigot's description. 



Eristalis arvorumt F. 



This common Indian species occurs at Simla, Matiana, Theog, 

 Phagu and Kufri. 



It is a fairly distinct species in both sexes, and like tenax and 

 solitus is tolerably easy to recognize when once it is understood. 

 Meijere gives quadrilineatus , F., as a synonym. 



Eristalis sp. 



Two 0* cf and a 2 from Kasauli, 15-V-08 and Phagu, 18 — 

 2r-v-i6, must approximate to kobusi, Meij., but the abdominal 

 marks are quite different. The principal point of resemblance 



