ACA^TIIINA. 27 



blackish, microscopically pubescent, sometimes orange at extreme 

 base with four distinct ammlations and a short two-jointed style ; 

 occiput considerably concave, dark, with a little grey pubescence. 

 In $ frons -g- width of head, barely broader at vertex and lower 

 end ; frontal triangle large, very prominent, shining, bare, bright 

 orange-brown, as is also the very broad posterior border to the 

 eyes; a small brown spot on frons just above the suddenly 

 widened frontal triangle. Thorax dark shining blue, punctate, 

 with microscopic .black bristles ; in c? a single median stripe of 

 yellow pubescence, not reaching anterior collar but leaving a shining 

 black spot bare of pubescence, the stripe extending hindwards to 

 middle of dorsum ; in $ two very narrow longitudinal median stripes, 

 rather approximating to one another, formed of minute whitish 

 pubescence, continued beyond suture a little, where they diverge 

 and broaden, reaching posterior corners of dorsum ; a moderately 

 broad transverse stripe of similar pubescence along suture, 

 narrowest in middle ; a patch of short golden yellow pubescence 

 on each shoulder and along anterior margin; pleurae as dorsum, 

 similarly punctate and with a little grey or whitish pubescence, 

 which is silvery white and thickest above front coxa3, on meso- 

 pleura just below wing, and on lower part of sternopleura. 

 Scutellum concolorous, similarly punctate, and with greyish 

 pubescence ; spines brownish, rather short. Abdomen dark shining 

 blue, punctate as thorax ; a little grey pubescence about front corners 

 and sides and denser and longer about centre of hinder part of 

 4th segment and also about base and centre of 5th ; genitalia 

 small, brown, two short telescopic cylindrical joints in c? , two 

 short filaments in $ ; venter deep blue, punctate, with a little 

 greyish pubescence. Legs : femora black, with a slight blue or 

 violet tinge and a little whitish-grey hair below ; knees narrowly 

 dark brown ; tibias black or dark brown, tips very narrowlv a 

 little paler; tarsi blackish brown, middle pair distinctly paler. 

 Wings dark brown, stigma and veins darker ; costal cell, discal cell 

 mainly or wholly, base of 4th posterior cell (sometimes base of 3rd 

 or even 2nd also), anal and axillary cells (sometimes hinder part 

 of 2nd basal cell also), clear or nearly so ; halteres brownish yellow. 



Length, 8|-9 mm. 



Described from six c? d 1 and one 2 i 11 perfect condition 

 from Tura, Garo Hills, Assam, 1500 ft., vii. 1917, and above 

 Tura, 3500 ft., viii. 1917 (Kemp}; a ^ from Sadiya, Assam; a 

 $ from Karkur Ghat, Nilgiri Hills, 1500 ft., v. 1911 (H. L. 

 Andrcwes) ; and a second c? from TCohima, Assam, all in the Indian 

 Museum ; and a specimen from Coorg, S. India (T. B. Fletcher). 



This species was given in my first paper on STRATIOMYIDJE as 

 "auricollis, Bigot," which afterwards proved to be merely a MS. 

 name. 



The gold pubescence on the front of the thorax and that 

 forming an approximate cross on the thorax in the $ rubs off 

 very easily. 



