92 U.S. NATIONAL MUSEUM BULLETIN 266 



Microspirobolus trifasciatus Loomis 1964a, p. 115. 



TYPE: Chicago Nat. Hist. Mus. 



TYPE AND PARATYPE LOCALITY: Almirante, Bocas del Toro 

 Prov., Panama. 



Family SPIROBOLIDAE 



Genus AZTECOLUS Chamberlin 1943b, p. 28. 



TYPE SPECIES: Spirobolus nigrior Chamberlin, by original designa- 

 tion. 

 Aztecolus collaris Chamberlin 1953a, p. 148. 



TYPE: Chicago Nat. Hist. Mus. 



TYPE AND PARATYPE LOCALITY: Volcan Tajumulco, Guatemala. 

 Aztecolus nigrior (Chamberlin). 



Spirobolus nigrior Chamberlin 1941d, p. 253; 1943b, p. 28. 



? Aztecolus nigrior Chamberlin 1947b, p. 47; Keeton 1960a, p. 35. 



TYPE: Collection of R. V. Chamberlin. 



TYPE LOCALITY: Horsetail Falls, Hacienda Vista Hermosa, Villa 

 Santiago, Nuevo Leon, Mexico. 



PARATYPE LOCALITY: Ojo de Agua, Sabinas Hidalgo, Nuevo Leon, 

 Mexico. 



OTHER LOCALITIES: Linares Nuevo Leon (Chamberlin 1943b); 

 Pablillo, Nuevo Leon (Chamberlin 1947b); CarTon de las Anahuas, 

 Linares, Nuevo Leon; 13 mi. west of Milpillas, Zacatecas, Mexico 

 (Keeton 1960a). 

 Aztecolus pablillo Chamberlin 1947b, P. 47. 



TYPE: Acad. Nat. Sci. Philadelphia, no. 9969. 



TYPE LOCALITY: Pablillo, Nuevo Le6n, Mexico. 



OTHER LOCALITY: Five mi. west of Gomez Farias, in Sierra Madre 

 Oriental, Tamaulipas, Mexico (Keeton 1960a). 



Genus HILTONIUS Chamberlin 1918b, p« 166. 



TYPE SPECIES: Hiltonius pulchrus Chamberlin, by original desig- 

 nation. 

 Hiltonius callipus (Bollman). 



Spirobolus callipus Bollman 1893, p. 191; Keeton 1960a, p. 114. 



TYPE: Said to be in U.S. Nat. Mus. but not found recently. 



TYPE AND PARATYPE LOCALITY: Guanajuato, Mexico. 



Keeton lists this species under "nomen inquirendum" but states that 

 Bollman 's description is sufficient to assign the species to Hiltonius. 

 Hiltonius carpinus Chamberlin 1943b, p. 21. 



Hiltonius crassus Chamberlin 1943b, p. 21; Keeton 1960a, p. 106. 



Hiltonius tepoztlanus Chamberlin 1943b, p. 21; Keeton 1960a, p. 106. 



TYPE: Collecdon of R. V. Chamberlin. 



