1910] Graenicher, Flies of Wisconsin. 37 



Chilosia. 



C cyanescens Loew. Milwaukee Co. 



C. hoodiana Bigot. 2 females from Solon Springs, Doug-las Co. agree 

 well with the description. 



C. prima Hunter. 4 males and 1 female taken in Milwaukee Co. prob- 

 ably belong to this species, although none of them exceed 8 mm. 

 in leng-th. The type was from Pennsylvania. 



C. sororcula Williston. Burnett and Sheboygan Cos. This was de- 

 scribed from Mexico, and reported by Snow from the Magdalena 

 Mts. in New Mexico. Our 6 specimens agree with 2 specimens 

 in the Milw. Publ. Museum from the Magdalena Mts. (received 

 from Prof. Snow). Front varying considerably in width in the 

 females. 



Baccha. 



B. clavata Fabrieius. Milwaukee Co., 3 males and 3 females. All have 

 a yellow spot on each side of the first abdominal segment 

 as observed by Hunter in a female from Nebraska (Can. Ent. 

 XXIX, 30). 



B. fascipennis Wiedemann. Milwaukee, Washington and Polk Cos. 



Ocyptamus. 

 O. fuscipennis Say. Milwaukee Co. 



Pyrophaena. 



P. granditarsus Forster. Burnett Co. 



P. rosarum Fabrieius. Sheboygan Co. The occurrence of these circum- 

 polar species of Pyrophaena in Wisconsin has been reported by 

 the writer in the Can. Ent., Jan. 1910, pp. 28-29. 



Platychirus. 



P. hyperboreus Staeger. Milwaukee, Washington and Burnett Cos. 

 P. peltatus Meigen. Milwaukee, Sheboyg - an and Washington Cos. 

 P. quadratus Say. Milwaukee and Washington Cos. 



Melanostoma. 



M. mellinum Linne. Milwaukee, Washington, Douglas, Burnett and 



Polk Cos. 

 M. obscurum Say. Milwaukee and Washington Cos. 



