ENTOMOSTRACA OF MINNESOTA. 319 



ing claw, with two short soft set?e spriaging from its base. The entire 

 claw somewhat longer than the last three segments conjointly. 



''Caudal rami long and slender, slightly sinuate, the transverse 

 diameter of each not more than one-twentieth its length; the basal 

 fifth, however, considerably thickened. Eami smooth, except poste- 

 riorly, where the margin is closely set with stout, short spines, length- 

 ening toward the distal end of the ramus. Terminal claw slightly 

 curved at the tip, contained two and a half times in the length of its 

 ramus. Subtermiual claw nearly two-thirds the length of the terminal, 

 also slightly curved. Claw-like seta almost immediately above the 

 latter, more slender, but two thirds its length. Besides the above, a 

 short slender seta springs from in front of the base of the terminal 

 claw. 



"The first and last segments of the second pair of legs sub equal, 

 each two-thirds the length of the second; basal segment straight, its 

 length five times its width, with three slender setse, one borne upon the 

 middle of its exterior side, and two near the apex, opposite each other. 

 Second segment slightly curved, with a single slender seta near the 

 apex, on its outer margin. Third segment with two terminal setse, 

 one nearly straight, claw-like, about three-fourths the length of its 

 segment, and the other curved and blunt." 



Habitat: Yellowstone Eiver, Yellowstone Park, Wyoming (S. A. 

 Forbes); (?) Minnesota (Herrick). 



To my mind Candona ornata Herrick belongs here. But since the 

 figure given by Professor Herrick is about all I have to base my 

 ojjinion upon, it is not thought wise to enforce this opinion upon the 

 public. 



GENUS CYPRIS O. F. Mtiller. 1785. 



In both sexes the antenna is five-jointed. The natatory setfe on the 

 third extend to the tip of the terminal claws. 



The mandibular palp does not extend beyond the tip of the man- 

 dibular teeth. 



The branchial plate of the first maxilla is large, bearing stiff, plu- 

 mose setce. The first mandibular process is armed with two Particu- 

 late thorns. 



The second maxilla bears a branchial plate. 



The second foot resembles that of Cypridoims. 



The abdominal ramus is stout, and terminates with two more or 

 less stout claws, in front of which occurs a short and behind which a 

 long seta. 



Males are unknown; propagation parthenogenetic only. 



