36 PROCEEDINGS OF THE NATIONAI^ MUSEUM. vol.60. 



Gonopods as shown in plate 13, figure 11, and plate 14, figures 1 

 and 2. 



Number of segments, male, 38. 



Length, about 20 mm. ; thickness, 2 mm. 



Locality. — Guatemala : Purula, one male and an immature female. 

 June, 1906. 



Type.— Cat. No. 842, U.S.N.M. 



Genus SPIROSTROPHUS Saussure and Zehntner. 



80. SPIROSTROPUS MUSARUM (Cook). 



Olosselus niusarum Cook, Proc. U. S. Nat. Mus., vol. 40, 1911, p. 165. 

 Locality. — Costa Rica : La Colombiana. 



Superfamily POLYDESMOIDEA. 



Family STRONGYLOSOMIDAE. 

 Genus ORTHOMORPHA Bollman. 



81. ORTHOMORPHA COARCTATA (Saussure). 



Polydesmus coantata Saussxire, M6m. Myr. Mex., 1860, p. 39, flg. 18. 

 Orthoniorpha coarctata Pocock, Ann. mus. civ. Genoa, 1895, ser. 2, vol. 

 14, p. 809. 



Localities. — Costa Rica: Port Limon, several males and females 

 (W. M. Wheeler); Guatemala: Puerto Barrios, male and females 

 (W. M. Wheeler, January 15, 1921) ; Panama: Ancon, Canal Zone, 

 many specimens (W. M. Wheeler, November, 1911). 



Genus OXIDUS Cook. 



82. OXmUS GRACILIS (Koch). 



Fontaria gracilis C. L. Koch, Syst. d. Myr., 1847, p. 142. 

 Orthoniorpha gracilis Brolemann, Mem. Soc. Zool. France, 1905, p. 341. 

 Oxidus gracilis Cook, Proc. U. S. Nat. Mus., 1911, vol. 40, p. 628. 



Localities. — Guatemala: San Lucas Tollman, several specimens 

 (W. M. Wheeler, January, 1912) ; Costa Rica : San Jose. 



Family PLATYRACHIDAE. 

 Genus TIRODESMUS Cook. 



83. TIRODESMUS FIMBRIATUS (Peters). 



Polydesmus (Stenmna) firnbriatus Peters, Mon. Ber. Akad. Wiss., Berlin, 



1864, p. 543. 

 Platyrrhacus bioUcyi Caki., Rev. Suisse. Zool., 1902, vol. 10, p. 658, pi. 11, 



figs. 67, 68.— Brolemann, Ann. Soc. Ent. France, 1905, vol. 74, p. 341. 

 Tirodcsmus flmbriaius Cook, Brandtia, 1896, vol. 12. 



