INSE;CUT0R INSCITIt^ menstruus 135 



Two females: Anchorage, Alaska, June 11, 1921 (type), 

 and Valdez, Alaska, June 8, 1921 (J. M. Aldrich). 



This striking species apparently comes in the subgenus Bar- 

 heriella, as is evidenced by the bare antennal frons (this seems 

 to be the counterpart of the bare frons in the males of 

 chilosioides and versipellis) , the projecting hairs on the lower 

 posterior margin of the scutellum and the venation. If this 

 proves to be the case it would bear out my belief that the 

 females of tuberculate-faced male Chrysogasterini in all cases 

 have no tubercle. 



Tribe CHILOSINI 



The genus Chilosia is one of the largest of the Syrphid 

 genera in Europe. Becker in his revision of the European 

 forms treats one hundred and forty species. In Williston's 

 Synopsis of Syrphidae there are twenty species recorded from 

 North America. Three of these have been placed in other 

 genera and one has been found to be the female of a previously 

 described species. In the present paper an equal number of 

 additional species have been described which, with what have 

 been recognized in recent years, swells their number to fifty. 

 Of the new species described since Williston's synopsis a large 

 proportion (ten) have been collected by Dr. J. M. Aldrich, 

 most of them in Idaho. Another collector who has added to 

 the museum collection considerable material in Chilosia, not 

 only of collected but also of reared material, is Mr. H. E. 

 Burke, of the Bureau of Entomology. Mr. Burke tells in one 

 of his recent papers that seventeen years ago Dr. E. A. Schwarz 

 showed him the single specimen of TracJiykele (Coleoptera) pos- 

 sessed by the National Museum and said : "Do not bring in the 

 common things. Get the rare ones, get the rare ones." Since that 

 time over a hundred specimens of the four named species have 

 passed through Burke's hands, and the Museum now has the 

 most representative collection of TrocJiykch in the world. And 

 he adds, "All from the deep impression made on the mind of 

 a young collector by the inspiring words of Dr. Schwarz." 



Mr. Burke has shared some of his success as a collector with 



