1915.] NATURAL SCIENCES OF PHILADELPHIA. 291 



Measurements (in millimeters). 



Buenos Aires. 

 . ^ , Misiones. 



9 (Paratype.) (Tj^e.) (Paratype.) 



Length of body 10. 10.2 10.2 



Length of pronotum 1.7 1.8 1.9 



Greatest (caudal) width of pro- 

 notum 3 3 3.1 



Length of tegmen 6.9 7 6.4 



Length of wing 14.9 14.7 14 



Length of caudal femur 7 7.1 7.2 



Length of ovipositor 3.8 3.6 3.9 



Though the color pattern is very obscure in these dark specimens 

 before us, it shows a distinct similarity to that of the usually pale 

 brasiliensis, in- which species the color pattern is, as a result of the 

 pale general coloration, usually decidedly recessive. In the present 

 species the general coloration is bister, with intermediate channel 

 of tegmina, under parts of body and limbs buffy, the latter flecked 

 with bister dorsad. The occiput is bister striped with three narrow 

 buffy longitudinal lines. The maxillary palpi are pale, clothed with 

 dark hairs and \^dth distal portion of terminal joint briefly infuscated. 

 The entire lower portion of the face and lateral lobes of the pronotum 

 are buffy. 



In addition to the type we have examined, a female bearing the 

 same data and one from the state of Misiones, Argentina, taken in 

 February, 1911, by P. Jorgensen. These specimens are all in the 

 collection of The Academy of Natural Sciences of Philadelphia. 



We take pleasure in dedicating this species to our co-worker, 

 Mr. Morgan Hebard, whose masterly paper on the North American 

 species of this genus has placed the study of the group on a permanent 

 basis, making possible, by its comprehensive treatment of the sub- 

 ject, the study of the genus as a whole. 



Gryllus argentinus Saussure. 



Misiones. January, 1911. (Jorgensen.) Two females. 



Jujuy, Prov. of Jujuy. April and December, 1911. (Jorgensen.) 

 Two females. 



La Cumbre, Prov. of Cordoba. (Lizer.) Three females. 



Chacras de Coria, Prov. of Mendoza. Elev. 936 meters. January 

 9 and 11, 1907 and 1908. (Jorgensen.) One male, two females. 



Of this series the Jujuy and Misiones individuals have caudate 

 wings, the others have abbreviate mngs. The La Cumbre specimens 

 are more uniformly colored than the others, the Chacras de Coria 



