1918.] NATURAL SCIENCES OF PHILADELPHIA. 207 



it is of the general color; anal field weakly suffused and venation 

 heavily pencilled with bone brown. Wings with the venation weakly 

 pencilled with prbut's brown. Disto-dorsal abdominal segment 

 ^ith the paired pilose areas touched with kaiser brown, the paired 

 process of the same segment blackish fuscous; femoral and tibial 

 spines tipped with chestnut brown. 



Length of body, 18 mm.; length of pronotum, 3.6; greatest width 

 of pronotum, 4.2; length of tegmen, 29.5; greatest width of tegmen, 

 9.5; length of caudal femur, 9.6. 



The ij'pe is unique. 



Gryllacris cruenta Brunner. 



1888. Gryllacris cruenta Brunner, Verhandl. k.-k. zool. botan. Gesell. Wien, 

 XXXVIII, pp. 321. 315. [Upper Amazonia.] 



Para. (C. F. Baker.) One female. 



This scarce and striking species has been recorded by Griffini, 

 on the basis of a male, from Paramaribo, Surinam.^^ His specimen 

 showed certain differences from the original description, but these 

 he considered to be individual. Our specimen also shows certain 

 differences, but these are only in part those noted by Griffini. Our 

 specimen has the coloration much like that given in the original 

 description, less like that given by Griffini as far as the head and 

 pronotum are concerned. The caudal femora have nine to ten 

 spines on the ventro-internal margin instead of three to four as 

 described, and eight as given by Griffini, while the external margin 

 has seven to eight spines seven are given in the original description 

 and six by Griffini. The caudal tibiae have five spines on each 

 dorsal margin instead of five internal and seven external as originally 

 described, and six external and five to six internal as described bj^ 

 Griffini. It is evident there is considerable variation individually 

 in the number of these spines and their diagnostic value must not 

 be overrated. The present specimen is slightly smaller than the 

 original measurements of the female, except that the ovipositor is 

 of exactly the same length. 



GRYLLID^. 



Gryllotalpinse. 



Scapteriscus didactylus (Latreille). 



180-1. Gryllotaipa didactyla Latreille, Hist. Nat. Gen. Crustac. et Ins., XII, 

 p. 122. [Cayenne; Surinam.] 



Paramaribo, Surinam. (K. Mayo.) Two females. 



Para. (C. F. Baker.) One female. (Thayer Expedition.) One 



female. [M. C. Z.] 



Igarape-assu. January 17 (1) and 23 (1), 1912. Five females. 



« Ann. Mus. Nat. Hangar., XII, p. 249, (1914). 



