32 U.S. NATIONAL MUSEUM BULLETIN 266 



Genus SIERRESMUS Chamberlin 1943b, p. 60. 



TYPE SPECIES: Sierresmus hidalgonus Chamberlin, by original des- 

 ignation. 

 Sierresmus hidalgonus Chamberlin 1943b, p. 61. 



TYPE: Collection of R. V. Chamberlin. 



TYPE AND PARATYPE LOCALITY: Chapulhuacan, Hidalgo, Mexico. 



Family PLATYRHACIDAE 



Genus NYSSODESMUS Cook 1896, p. 53. 



TYPE SPECIES: Nyssodesmus alboalatus Cook, by original designa- 

 tion. 

 Nyssodesmus alboalatus Cook 1896, p. 53. 



TYPE: Zool. Mus. Berlin. 



TYPE LOCALITY: Nicaragua. 

 Nyssodesmus antius (Chamberlin). 



Platyrhacus antius Chamberlin 1914, p. 189; Chamberlin 1922, p. 40. 



TYPE: Acad. Nat. Sci. Philadelphia. 



TYPE AND PARATYPE LOCALITY: Juan ViiTas, Reventazo'n Road, 

 Costa Rica. 



OTHER LOCALITY: Tilaran, Costa Rica (Attems 1933). 

 Nyssodesmus attemsi Hoffman 1960, p. 27. 



TYPE: U.S. Nat. Mus., no. 2468. 



TYPE LOCALITY: Puerto Armuelles, Panama. 

 Nyssodesmus bivirgatus (Carl). 



? Polydesmus (Odontodesmus) python Peters 1864, p. 543. 



Platyrrhacus bivirgatus Carl 1902, p. 652; Chamberlin 1922, p. 40. 



TYPE: Mus. Hist. Nat. Geneve (H) 



TYPE LOCALITY: San Jos^, Costa Rica. 



OTHER LOCALITIES: La Palma, and Carrillo, Costa Rica, (Cham- 

 berlin 1922); Rio .limenez, Costa Rica (Chamberlin 1933). 

 Nyssodesmus concolor Loomis 1964a, p. 59. 



TYPE: Chicago Nat. Hist. Mus. 



TYPE AND PARATYPE LOCALITY: Almirante,BocasdelToroProv., 

 Panama. 



Nyssodesmus fraternus (Carl). 



Platyrrhacus fraternus Carl 1902, p. 655; Chamberlin 1922, p. 40. 



Platyrhacus fraternus Hoffman 1953c, p. 256; Jeekel 1963a, p. 89. 



TYPE: Mus. Hist. Nat. Geneve. 



TYPE LOCALITY: San Jose', Costa Rica. 



PARATYPE LOCALITY: Limo'n, Costa Rica. 



OTHER LOCALITIES: La Palma, and Cachi', Costa Rica (Chamberlin 

 1922). 



