40 Bulletin Wisconsin Natural History Society. [Vol. 8, No. 1. 



the abdomen from the 4th segment on is covered with yellow 

 pile ; it shows in general a lighter coloration than the typical 

 evecta from this locality, having lighter antenna?, and the yellow 

 pile of thorax and 2nd abdominal segment, as also the reddish 

 parts of the legs being of a lighter hue. 

 V. vesiculosa Fabricius. Milwaukee Co. Several specimens were taken 

 by Dr. G. P. Earth from the nest of a wasp, a species of Crabro. 



Sericomyia. 



S. chrysotoxoides Mac-quart. Milwaukee Co. 



S. militaris Walker. Milwaukee and Washington Cos. 



Eristalis. 



E. aeneus Scopoli. Milwaukee Co. 



E. bastardi Macquart. Milwaukee, Washington, Door and Douglas Cos. 



E. dimidiatus Wiedemann. Milwaukee, Washington. Marathon. Ash- 

 land, Douglas and Burnett Cos. 



E. flavipes Walker. Milwaukee, Washing-ton and Burnett Cos. 



E. meigenii Wiedemann. Milwaukee, Washington. Marathon and 

 Douglas Cos. 



E. saxorum Wiedemann. A specimen from Milwaukee in Dr. G. P. 

 Barth's collection agrees fairly well with the description, but 

 it has the posterior half of the scutellum yellow, and the pos- 

 terior half of the oth abdominal segment velvety black. 



E. tenax Linne. Milwaukee, Washington and Douglas Cos. 



E. transversus Wiedemann. Milwaukee, Racine, Washington. Door, 

 Douglas and Polk Cos. 



E. vinetorum Fabricius. 2 specimens from Milwaukee Co. 



Tropidia. 

 T. quadrata Say. Milwaukee and Washington Cos. 



Helophilus. 



H. bilinearis Williston. Milwaukee Co. 

 H. bruesi n. sp. 



Female. — Close to latifrons and similis. Length about 13 

 mm. Face black, the shining median stripe is black, broad, 

 slightly narrowed above, and reaches the antenna?. Profile of 

 the face beneath the antennae is onlv slightly concave. Pile of 



