144 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Figure S.—Onychelus obustus Cook, male paratype from Riverside County, California: 

 a, anterior gonopods, cephalic aspect; b, same, with left posterior gonopod in the gonocoel, 

 caudal aspect; c, left posterior gonopod, caudal aspect. Saussurobolus neglectus Carl, 

 male holotype from Cuernavaca, Mexico: d, anterior gonopods, caudal aspect; e, left 

 posterior gonopod, caudal aspect (from Carl, 1919). 



great similarity, and it seems entirely possible that the last two may 

 not be specifically distinct from 0. obustus. The final determination 

 concerning this matter we leave to someone having the opportunity 

 to study the genus in detail with large quantities of fresh material 

 from numerous localities. At present, each of the nominal forms is 

 known only from its type locality. 



Onychelus medolus Chamberlin 



Onychelus medolus Chamberlin, 1941a, p. 13, figs. 17, 18 (male holotype in the 

 Chamberlin collection, from Olberg, Pinal County, Arizona, collected on 

 December 27, 1940, by Stanley and Dorothea Mulaik). 



Gosichelus medolus Chamberhn, 1949, p. 168 



