90 The Graspedosomatidse of North America. 



Craspedosoma oriljates Latzel. 



Genitalia apparently similar in plan to those of C. rawlinsii, , but the ninth 

 pair of legs consisting of two clavate structures united at base, diverging at 

 apex and beset with bristles. Seventh pair of legs decidedly smaller than the 

 sixth. 



Craspedosoiua stygium Latzel. 



Genitalia, according to Latzel, of four pairs of structures, one clavate ( prob- 

 ably ninth legs) and three pairs of smaller structures between. 



Seventh pair of male legs wanting, that is, there are but six pairs in front 

 of the genitalia. 



Legs 4-6 stump-like, though the author of the species doubts whether this 

 character may not be accidental. 



Craspedosoiua inoniliforme Latzel. 



Legs 3-7 not noticeably crassate, the terminal joint rather thick, pulvinate. 



Seventh legs reduced, their coxse enlarged, posteriorly with a hirsute pro- 

 cess, the pedigerous laminte posteriorly with a sharp cuneiform process. 



Ninth legs clavate, more or less evidently jointed, with bristles at the end. 

 Pedigerous lamina medianly produced between the clavate structures and 

 hollowed out in front. 



Craspedosoma iuutalt»ile Latzel. 



Legs 3-7 strongly crassate, more sparsely hairy, shining, the terminal joint 

 compressed, scarcely pulvinate. 



Ninth legs in the young five-jointed, attenuate, falcate; in adult modified 

 into a complex structure apically with long compound bristles ; basally giving 

 rise to a long flagellum, suggestive as the author says of the flagellum of luli- 

 dse, and apparently indicating a functional difference from other Chordeumidse. 



Tenth and eleventh legs with an inwardly projecting hamate process from 

 the distal end of the coxse, also a pear-shaped wart on the base of the coxse. 



It is also stated that the females do not have the legs of the 

 second segment developed, a character apparently of great im- 

 portance. The species has, however, according to Latzel, several 

 varieties and in one of these a female had the usual number of 

 legs. Judging from the American forms it is very remarkable 

 that such a character should not be constant. The difficulty of 

 correctly determining females is very great, especially when the 

 species are incompletely known. 



Craspedosoma flavescens Latzel. 



Legs 3-7 strongly crassate, distal half of the last joint cushioned. 



Ninth legs clavate, hirsute, separated by a pair of small structures basally 



