172 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 1. NO. 3. 
35. Sericomyia militaris, Walk. Not frequent. I have observed 
this species in September, visiting the flowers of several 
species of Compositae, as for example Aster piiniceus, 
L. and Soildago caesia, L. 
Ranges northward as far as Nova Scotia and Hud- 
son's Bay Territory, and has been recorded from a few 
Eastern States, Colorado and New Mexico. 
36. Eristalis tenax, L. Abundant throughout the season, from 
April (on catkins of Salix discolor, Muhl.) to October 
(on flowers of HamaincUs Virginiana, L.) 
Inhabits Europe, Africa, Asia, Japan and North 
America, and has been reported for many of the states. 
37. Eristalis aeneus, Eabr. Not frequent, but occurring at all 
times of the season, from April (on catkins of Salix dis- 
color, MiihL)to October (on flowers of Aster laevis, L.) 
Inhabits Europe, Africa, Syria and North America 
and has been reported for New York, Ohio and Illinois. 
38. Eristalis dimidiatus, Wied. A very common species on 
flowers, from April (on catkins of Salix discolor, 
Muhl.) to September (on flowers of Aster piiniceus, L.) 
Has been previously recorded from the Eastern 
States to Ohio, Illinois and Kansas. 
39. Eristalis meigenii, Wied. (E. brousi. Will.) Rather 
frequent, from April to October (on flowers of Aster 
laevis, L.) 
This species has a wide range of distribution in this 
continent, going northward to Nova Scotia and Alaska, 
southward to South America ; within the United States 
it has been recorded from the Eastern, Middle and 
Western States to Idaho. 
40. Eristalis bastardi, Macq. Not common. From May (on 
flowers of Primus Americana, Marsh.) to October (on 
flowers of Aster laevis, L.) 
Occurs as far north as Nova Scotia and Labrador, 
and has been reported for the New England States, 
Ohio and Illinois. 
41. Eristalis flavipes. Walk. Not common. From July (on 
flowers of Solidago serotina, Ait.) to October (on flow- 
ers of Aster laevis, L.) 
Previously recorded from British Columbia, Wash- 
ington, Minnesota, Illinois, ^Michigan, Ohio and the 
New England States. 
