Wii.i.i wisoN : Cram'ish ni Ai.ikciiiav County. 13 



The chelte are blue, liecoming yellowish near the extreme tip, which 

 is red. The tubercles of the chehi; are yellow. The antenn;e are 

 (lark blue, with the alternating rings paler. 'I'he young mentioned 

 above as having been taken from their tunnel, varied in total length 

 from three-fourths t > one and one-eighth inches. In color they were 

 bluish green, rarely pale and flesh colored. Faxon has recorded that 

 in the Indian Territory the Indians call this species " red crayfish." 

 For this locality " blue crayfish " will be an appropriate name. 



5. Ciimbarus />/■(>/>/' lu/uiis (rirard. This common species has been 

 taken in the Allegheny and Monongahela Rivers and in many of the 

 small streams throughout the county. In color it is variable, being 

 usually a clear brownish green, tinged with red and with a large red 

 blotch on the side of the carapace near the posterior edge. 



6. Cainhanis rusticiis Girard. Ohio River, Neville Island. This 

 species is similar in color to pro/>inquus, which species it very much 

 resembles. 



