THE RELATIONS OF THE ANDRENINE BEES TO THE 
ENTOMOPHILOUS FLORA OF MILWAUKEE 
COUNTY 
S. GRAENICHER. 
Owing to their large number of species, as also to the close 
relations of many of the species to certain flowers, the bees of 
the family Andreninae occupy a prominent position among the 
flower-visiting insects of our neighborhood. This paper deals 
with 47 species, representing about one-fifth of the entire bee- 
fauna of our region. Several species make their appearance 
quite early in the spring, and from this time on the family is 
represented throughout the floral season, although not a single 
one of the species extends its time of flight over two months and 
a half. Some are of rather common occurrence, while others 
are extremely rare, and are only occasionally met with. For 
several years past I have given much attention to the bees of 
this family, and have gradually come across 17 new species of 
Andrena from Milwaukee county, which have been named and 
described as follows: 
Andrena subcommoda ^ 
Andrena sigmundi ■ 
Andrena multiplicata T. D. A. Cockerell, Canadian Entomologist, 
Andrena radiatula j 1902, p. 45. 
Andrena rufosignata j 
Andrena clypeonitens J 
Andrena graenicheri 
Andrena parnassiae 
Andrena peckhami 
T. D. A. Cockerell, Annals and Magazine of 
Natural History, 1902, p. 101. 
