2 -JO Records oj the Indian Museum. [W)l. Ill, 1909.] 



author distinctly savs an " extremely small" style, referring to his 

 species, and the plate distinctly shows the normal venation of 

 Bombylitis, and not that described by Osten vSacken, 



The head is as broad as the thorax in pulchellus, and in that 

 character alone it differs from the typical Bombylius, in which, 

 genus it must therefore remain, 



A second question is whether Cornastes or Heterostylum, Macq., 

 should stand. Prof, Aldrich adopts ths latter in his recent Cat. 

 N. Amer Diptera. Osten Sacken admits the identity of the two 

 genera (Cat. N Amer. Dipt., Add., p. 267, 1878) but upholds his 

 own generic name on the ground that Macquart's principal charac- 

 ter, the pubescence of the third antennal joint, had no existence in 

 reality, O t^n Sacken having examined the type in Bigot's collec- 

 tion and found the supposed pubescence to be dust. The two 

 other characters of the genus admitted by Osten Sacken, namely, 

 the emarginate eyes and the venation mentioned above, were, 

 however, also given by Macquart in his diagnosis. 



Osten Sacken has himself remarked somewhere that a generic 

 name founded upon an absolutely incorrect character seems justly 

 to require alteration, as bein^ scientifically wrong and mislead- 

 ing, but the name Heterostylum is not intrinsically incorrect, for 

 though the alleged pubescence is not present, the antennal style is 

 sufficiently differently formed (Macquart distinctl}^ says " la forme 

 du stj'le, differen'e," etc.) to justify the retention of his name. 



Therefore, because it may be regarded from thi; point of view, 

 I think Heterostylum should stand. The genus, however, has not 

 yet been found in the Orient. 



[N.B. — The types of all the new species described in this 

 paper are in the Indian Museum collection, except where otherwise 

 stated.] 



