84 Lake Maxinkuckee, Physical and Biological Survey 



1. POND CRAWFISH 



CAMBARUS BLANDINGI ACUTUS (Girard) 



This species may be at once distinguished by the fact that in 

 the males the third and fourth pairs of walRing legs bear a hook 

 on the third joint from the base. The rostrum is long and approxi- 

 mately triangular, with a pair of small teeth quite close to the tip. 

 The large pincers and the legs which bear them are long, slender, 

 and roughly granular. 



This crawfish is represented in the collection by 2 males and 7 

 females from Aubeenaubee Creek, one male and one female from 

 Culver Inlet, 8 males and 2 females from Spangler Creek, and by 

 2 males and 1 young female from Bruce Lake. 



This is the pond crawfish of the region, its home being in wood- 

 land ponds. Individuals were seen from time to time but they 

 usually escaped under the leaves. Several dead ones were found 

 in ponds. Generally speaking, it is not a very abundant species 

 anywhere. It is occasionally met with in the sloughs of the Mis- 

 sissippi. 



2. THE SOLITARY CRAWFISH 



CAMBARUS DIOGENES Girard 



This crawfish is an inhabitant of the lake at certain times only. 

 It visits the water early in the spring for the purpose of produc- 

 ing its young, but during the remainder of the year each individual 

 lives alone in a burrow over which it constructs a chimney of mud 

 pellets. This habit is so peculiar, being shared by only one other 

 Indiana species, that it alone should be almost enough to distin- 

 guish the solitary crawfish; but as some of our readers may wish 

 to know what the animal is like the following description is given : 

 The body is high and compressed; the rostrum is short, thick- 

 edged, and without teeth near the tip ; the two longitudinal, curved 

 lines on the back run together throughout the whole part of their 

 length so that only small triangular spaces are left between them 

 in front and behind. The color is quite brilliant for a craw- 

 fish, the claws, rostrum, and the elevations on the shell being more 

 or less marked with crimson and yellow. Represented by 1 large 

 female and 7 young from Aubeenaubee Creek. Other examples 

 were noted in 1901, as follows : 



March 31, a good sized female caught in a pool at the birch 

 swamp; April 1, one dead, in ditch east of railroad, in Green's 

 marsh; April 2, remains of several seen in the Outlet; April 3, 

 remains of one found in Green's marsh; April 4, two caught, copu- 



