120 
Bulletin Wisconsin 'Natural History Society. [Vol. 10, Nos. 3-4. 
woods, on the other hand, is one of the upland variety that 
receives its water from the rain and melting snow, and dries out 
regularly toward the middle of the summer, thereby forcing its 
crawfish inhabitants to resort to burrowing. Specimens of C. 
immunis, and C. diogenes have been taken, together with C. 
blandingi acutus from the same pond and on the same date. The 
slough at Fountain City contained little water at the time, and 
may have become entirely dry later in the season, while the creeks 
near Wauwatosa and Corliss, mentioned above, are running 
throughout the year. 
C. (Faxonius) propinqiius Girard. This is a species of the 
lakes and permanent streams, and is quite common in the eastern 
part of the state, especially so in bodies of water draining into 
Lake Michigan. It occurs throughout the State of Michigan 
(Pearse), and in the Mississippi drainage of Illinois, Iowa and 
Minnesota (Ortmann). As to its connection with the Mississippi 
drainage in our state, it has been formerly reported from Green 
Co. (tributaries of the Pecatonica river), and Madison (tribu¬ 
taries of the Rock River). The writer has taken it on April ioth, 
1910, in Okauchee Lake, Waukesha Co. (draining into the Rock 
River), but has not come across it anywhere along the St. Croix 
and Mississippi rivers, although collections were made at various 
points between the headwaters of the St. Croix river and Rutledge 
on the Mississippi river in the southwestern corner of Wisconsin. 
Around Milwaukee males and females have been found as 
early as March 13th, 1910, in the Menomonee river, a tributary of 
the Milwaukee river, and on various other dates throughout the 
season in both of these streams. This species occurs also in Oak 
Creek, a small stream flowing into Lake Michigan near South 
Milwaukee. 
We have specimens from Lake Michigan, collected at New¬ 
port, Door Co., on August 6th, 1910, and some from Cedar Lake 
in Washington Co., and the outflowing Cedar creek, a tributary of 
the Milwaukee river. 
C. (Faxonius) virilis Hagen. This is undoubtedly the most 
common and widespread of our crawfishes, and the one most fre¬ 
quently used for food. Like the foregoing, it inhabits the lakes 
and streams with a constant supply of water, and may be expected 
