832 PROCEEDINGS OF THE ACADEMY OF [Nov., 



third, genicular lobes rounded, the internal spined, internal ventral 

 margin with a few weak spines distad, pagina sculptured as in 

 A. marmorata but much weaker; caudal tibiae very slightly longer 

 than the femora, compressed, dorsum armed with eleven to twelve 

 external and eight nternal spines, venter with several weak ad- 

 pressed spines, spurs on the external face shorter than those of the 

 internal; caudal tarsi with the distal and proximal joints subequal. 



General color vandyke brown, becoming tawny-olive on the venter, 

 the proximal portions of the femora, the distal section of the caudal 

 tibiae and the tarsi. Antennae, ocelli and mouth-parts tawny-olive. 



Measurements. 



Length of body, 19.5 mm. 



Length of pronotum, 7.1 " 



Length of tegmen, 6.2 " 



Length of caudal femiu", 20.5 " 



The type of this species is the only specimen examined. 



GRYLLID^. 

 GRYLLOTALPA Latreille. 

 Gryllotalpa hexadactyla Perty. 



San Carlos. (Schild and Burgdorf.) [U. S. N. M.] Two females. 

 This species has been recorded from Cache, Costa Rica. 



SCAPTERISCUS Scudder. 



Scapteriscus didactylus (Latreille). 



1804. Gryllotalpa didactyla Latreille, Hist. Nat. Crust, et Ins., XII, p. 122. 

 [Cayenne; Surinam.] 



San Carlos. (Schild and Burgdorf.) [U. S. N. M.] One male, one 



female. 



EIPIPTERYX Newman. 



1834. Ripipteryx Newman, Entom. Magazine, II, No. II, p. 204, PI. VII. 



T3q3e. — R. marginatus Newman. 



Eipipteryx carbonaria Saussure. 



1896. Rhipipteryx carbonaria Saussure, Biol. Cent.-Amer., Orth., I, p. 211. 

 [Volcan de Chiriqui, Panama, 2,000 to 3,000 feet.] 



Escazu. January, 1903. (C. F. Underwood.) [A. N. S. Phila.] 

 Two females. 



Side of Tablazo, altitude 1,500 meters. April, 1905. [No. 37.] (P. 

 Biolley.) Thirteen specimens. 



