North American Ceniropagidce. 249 



which Poppe figures on the inner margin of the second seg- 

 ment, and on the outer margin of the third segment, of the 

 outer ramus of the fifth leg of the female. 



This species differs so much from L. macrurus, that it 

 might almost be regarded as the type of a new genus, but 

 Poppe has not considered the differences as of generic value, 

 nor have de Guerne and Richard. Unlike L. macrurus, the 

 inner rami of the fifth pair of legs of the male although both 

 three-segmented differ from one another, and the right outer 

 ramus is composed of two segments instead of three. In the 

 female the differences are not so striking, for while the outer 

 rami are noticeably unlike, the inner rami are very similar. 



This species was found in Lake Sitai, China, and in the 

 Whangpoo River, which flows from it, the waters of both of 

 which are perfectly fresh. To my knowledge it has not yet 

 been recorded from any other locality. 



Epischura Forbes. 



Scopiphora ( ?), Pickering, "44, p. 62. 

 Epischura, Forbes, *82a. p. 647. 

 Epischura, Herrk-k, '83a. p. 384. 

 Epischura, Ilerrick, '87, p. 13. 

 Epischura, Herrkk and Turner, '85. p. 81. 

 Epischura, de Guerne et RiehanV89b, p. 141. 



Cephalothorax more or less distinctly six- segmented. Ab- 

 domen (furca included) composed of five segments in the fe- 

 male and of six in the male ; in the female, of the ordinary form 

 (nevadensis, nordenskibldi) or flexed to the right and provided 

 with a process on the right side of the second segment (hiaix- 

 tris) ; in the male, straight or very slightly flexed (nordenski- 

 oldi) or strongly flexed to the right (lacustris, nevadensis) ; in 

 the males of all species, second, third, and fifth segments pro- 

 vided on the right side with processes. Furcal rami hairy 

 on the inner margin, provided in both sexes with three plu- 

 mose terminal setae, one slender simple seta at the inner 

 apical angle, and a stout spine at the outer apical angle. 



First pair of antennae 25-segmented. Right male antenna 

 geniculate between the 18th and 19th segments; segments 



