76 U.S. NATIONAL MUSEUM BULLETIN 266 



Paraiulus viganus Chamber! in 1952b, p. 19. 



TYPE: Collection of R. V. Chamberlin. 



TYPE AND PARATYPE LOCALITY: Las Vigas, Veracruz, Mexico. 

 Paraiulus zempoalus Chamberlin 1943b, p. 31. 



TYPE: Collection of R. V. Chamberlin. 



TYPE AND PARATYPE LOCALITY: Parque Nacional de Zempoala, 

 Morelos, Mexico. 



Genus PHENIULUS Chamberlin 1943b, p. 29. 



TYPE SPECIES: Pheniulus phenotypus Chamberlin, by original desig- 

 nation. 

 Pheniulus mimeticus Chamberlin 1943b, p. 30. 



TYPE: Collection of R. V. Chamberlin. 



TYPE AND PARATYPE LOCALITY: Ixtapan del Oro, D. F., Mexico. 

 Pheniulus phenotypus Chamberlin 1943b, p. 30. 



TYPE: Collection of R. V. Chamberlin. 



TYPE AND PARATYPE LOCALITY: Oaxtepec, Morelos, Mexico. 



Genus THRINIULUS Chamberlin 1940b, p. 21. 



TYPE SPECIES: Paraiulus leucoclius Chamberlin, by original desig- 

 nation. 

 Thriniulus leucoclius (Chamberlin). 



Paraiulus leucoclius Chamberlin 1922, p. 19; 1940b, p. 21. 



TYPE: U.S. Nat. Mus., no. 829. 



TYPE LOCALITY: Actele, Guatemala. (Probably Actela.) 



PARATYPE LOCALITIES: Same and Tectic, Santa Rosa, Guatemala. 



Order SPIROBOLIDA 



KEY TO THE SUBORDERS OF SPIROBOLIDA 



1. Inner gonopods (phallopods or posterior gonopods) connected by 

 membrane and a sclerite, or only by membrane; posterior plates 

 (telopodites of anterior gonopods) contiguous or nearly so along 



inner basal sides TRIGONIULIDEA 



Inner gonopods not directly connected; posterior plates well separated 

 at base SPIROBOLIDEA 



Suborder SPIROBOLIDEA 



KEY TO THE FAMILIES OF SPIROBOLIDEA 



1. Prozonites of some segments usually with a pair of scobinae; an- 

 terior sternalplate of gonopods with apex produced distally, nearly 



