WISCONSIN DIPTBRA. A SUPPLEMENT TO THE 



PRELIMINARY LIST OF BOMBYUID&, 



SYRPHIDM AND CONOPWM. 



By S. Graenicher. 



About a year ago (this bulletin, vol. VIII, pp. 3 2 "44) tne 

 writer published a preliminary list of the flies of Wisconsin 

 belonging to these families. An account is herewith given of the 

 species collected in the summer of 1910 by the expedition of the 

 Public Museum of Milwaukee, at Hudson, in St. Croix County, 

 situated on the lower St. Croix river (July 6th to 12th), and 

 along the Mississippi river at Prescott in Pierce County (July 

 13th to 26th). Maiden Rock in Pierce County (July 27th to Aug- 

 ust 10th), and Fountain City in Buffalo County (August nth 

 to 17th). Of the species considered the following four are new 

 to the state : Pipiza f estiva, Conops bulbirostris, Conops fronto 

 and Zodion obliquef as datum. A fifth species : Systtzchus candi- 

 dulus met with at Prescott (Pierce County) was originally de- 

 scribed from material collected in Wisconsin (exact locality not 

 mentioned), but has not been reported from this state ever since. 



bombyliim:. 



Spogostylum. 

 S. albofasciatum Macqart. Two specimens from Prescott (Pierce 

 Co.), two from Maiden Rock (Pierce Co.), and one from Fountain 

 City (Buffalo Co.). 



S. pauper Loew. Two specimens from Maiden Rock (Pierce Co.). 



Exoprosopa. 

 E. decora Loew. Common at Hudson (St. Croix Co.), Prescott 

 (Pierce Co.), and Maiden Rock (Pierce Co.). 



E. fascipennis Say. Our collection contains nine specimens from 

 Hudson (St. Croix Co.), seven from Prescott (Pierce Co.), and one 

 from Maiden Rock (Pierce Co.). This material shows, as is often the 

 case in parasitic insects an enormous variation in size, the length of 

 the specimens ranging from six to fourteen mm. 



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