70 Bulletin Wisconsin Natural History Society. [Vol. 9, Nos. 1-2. 



Sphaerophoria. 

 S. cylindrica Say. Numerous specimens from St. Croix and 

 Pierce Cos. 



Neoascia. 



N. globosa Walker. One female from Maiden Rock (Pierce Co.) 

 belongs to Williston's "third variety". 



Rhingia. 

 R. nasica Say. Seven specimens from Maiden Rock (Pierce Co.). 



Eristalis. 



E. bastardi Maequart. Maiden Rock (Pierce Co.). 

 E. meigenii Wiedemann. Two males and one female from Maiden 

 Rock (Pierce Co.). 



E. tenax Linne. Specimens from Maiden Rock (Pierce Co.). 



Tropidia. 

 T. quadrata Say. Two males from Fountain City (Buffalo Co.). 



Syritta. 



S. pipiens Linne. Prescott and Maiden Rock (both, in Pierce Co.). 



Xylota. 



X. fraudulosa Loew. A male from Hudson (St. Croix Co.) and a 

 female from Maiden Rock (Pierce Co.). 



conopim:. 



Conops. 



C. bulbirostris Loew. Three specimens from Prescott, Pierce Co. 

 (two males and a female), evidently belong here. In all of these the 

 front and vertex are evenly black, the dust markings of the thorax 

 are golden yellow, and the pleural stripe is entirely absent on the 

 upper half of the pleura. In the female the process on the underside 

 of the fifth abdominal segment is exceedingly long; it is considerably 

 longer than in any other species of Conops or Physocephala known 

 from Wisconsin. 



C. fronto Williston. One female from Prescott (Pierce Co.). 

 Disk of metanotum only slightly black. Metasternum, as also the 

 disks of the third and fourth abdominal segments without any black 



