1911] Graenicher, Wisconsin Diptera. Supplement. 71 



whatever. Otherwise as in the description. This species was de- 

 scribed from western Kansas, and it has been reported by Jones 

 (preliminary list of the Conopids of Nebraska, Can. Ent. Vol. 

 XXXIX, pp. 250-252) from various points in Nebraska. 



C. sylvosus Williston. A specimen taken at Hudson (St. Croix 

 Co.) has the second abdominal segment red at apex, and is in this 

 respect somewhat distinct from the Burnett county specimen referred 

 to in the preliminary list of Wisconsin Bombylids, Syrphids and 

 Conopids published last year. 



C. xanthopareus Williston. Three males and two females from 

 Prescott (Pierce Co.). In the specimens from this state much varia- 

 tion in the color of the abdomen is noticeable. In those from Prescott 

 the color runs from black throughout to black combined with red on 

 first and basal portion of second segments, and in the specimens from 

 other regions (St. Croix and Milwaukee Cos.) the abdomen shows 

 still more red. 



Physocephala. 



P. affinis Williston. A male from Prescott (Pierce Co.) has the 

 frontal median stripe very distinct, and the facial grooves very dark. 

 The three stripes of the thoracic dorsum are confluent. This speci- 

 men unites the characters of P. affinis with those of P. margi/nata 

 (facial grooves and frontal stripe black). 



In Nebraska this species is very variable according to Jone's (Loc. 

 cit. p. 250). / 



P. furcillata Williston. Five specimens from Maiden Eock (Pierce 

 Co.). In all of these the scutellum is black with no trace of red. The 

 same is the case with the majority of the specimens from the ■ St. 

 Croix region, but a few of them have the scutellum reddish. 



P. tibialis Say. Two from Maiden Rock (Pierce Co.) and one 

 from Fountain City (Buffalo Co.). The process of the second joint 

 of the style projects rather distinctly; in all other points these speci- 

 mens answer the description. 



Zodion. 



Z. fulvifrons Say. Numerous specimens from St. Croix, Pierce and 

 Buffalo Cos. This is the most common Conopid found in Wisconsin. 



