1913.] NATURAL SCIENCES OF PHILADELPHIA. 313 



with the allied asinus Rehn and specularis Bruner are found to be 

 quite distinct. The males show some variation in size, the extremes 

 of tegminal length being twenty-eight and thirty millimeters. 



The information with several specimens taken December 12, 1909, 

 and 1910 is to the effect that the species was ''very common in the 

 Campo." 



Bruner has 'recently recorded a single' female specimen of this 

 species from Chapada, Matto Grosso, Brazil, but otherwise it has 

 not been correctly recorded since the original description. The 

 present author recorded specimens of the then undescribed specularis 

 as this species, but later corrected his error. 



Eutryxalis gracilis (Giglio-Tos). 



1897. Hiyalopteryx] gracilis Giglio-Tos, Boll. Mus. Anat. Comp., Torino, 

 XII, No. 302, p. 22. [San Lorenzo, Jujuy, Argentina; Caiza, BoUvian 

 Chaco.l 



Misiones. January 11; December 14, 1910. (No. 24.) Two 

 males, two females. 



Buenos Aires. February 20, 1909; May 1, 1907. Four females. 



One female has the dorsal aspect purplish, similar to an individual 

 of the same sex from Carcarana, Argentina. 



The species has been recorded from as far north as Caiza, Bolivian 

 Chaco, and Sapucay, Paraguay, south to the Rio Colorado, west to 

 Jujuy, Argentina, east to the Rio de la Plata and the Misiones. 

 Truxalis brevicornis (Johannson). 



1764. Gryllus brevicornis Johannson, Amoen. Acad., VI, p. 398. [North 

 America (Pennsylvania^").] 



Misiones. February 20, 1909; April 20, 1909. Two males. 

 Buenos Aires. February 14-26, 1909; March 7, 1909. Five 

 females. 



A widely distributed American sj^ecies found as far south as the 

 Rio Colorado of Argentina. 

 Orphula pagana (Stai). 



1860. Gomphocerus {H yalopteryx) paganus St&l, Kong, Svenska Freg. 

 Eugenics Resa, Zool., I, Ins., p. 339. [Rio Janeiro, Brazil.] 



Misiones. March 27, 1909; April 30, 1910; May 5-6, 1910; 

 December 12, 1910. (Nos. 7 and 8.) Ten males, eight females. 



This interesting series has been compared with thirteen other 

 individuals of the genus from localities in Brazil and Paraguay. 

 It is evident that considerable individual variation in several charac- 



^ The original material was credited to DeGeer, and he subsequently says 

 {Mem. Ins., Ill, p. 499) he received the species from Pennsylvania, sent by 

 Acrelius. 



