NO. 1661. ON SOME BRAZILIAy GRASSHOPPERS— REIIN. Ill 



Those specimens are inseparable from Sapucay, Paraguay, indi- 

 viduals. The range of the species is here extended considerably to 

 the northward, the type-locality, Colonia Risso, near the Rio Apa, 

 northern Paraguay, having been the most northerly previous record. 



Genus CORYACRIS, " new. 



This new genus is closely allied to Catreus Stal, but differs in details 

 best expressed in the diagnosis. 



Fastigium somewhat produced, horizontal, sublanceolate, not 

 deeply excavate; face regularly sloping without any marked division 

 between line of fastigium and line of face; frontal costa sulcate; eyes 

 prominent; antennae depressed, glightly expanded proximad. Pro- 

 notum with the median carina straight, not appreciably elevated; 

 lateral caringe descending ventro-cephalad on the prozona. Teg- 

 mina elongate lanceolate, surpassing the abdomen. Prosternal spine 

 compressed, slightly bulbous and distinctly retrorse distad; inter- 

 space between the mesosternal lobes distinctly longitudinal, between 

 the metasternal lobes subquadrate to slightly transverse. Supra- 

 anal plate of the male trigonal; cerci styliform; subgenital plate 

 compressed, rostrate. Cephalic and median limbs rather robust, 

 the femora appreciably inflated in the male. Caudal femora with 

 the medio-dorsal portion of the genicular margin provided with a 

 distinct spine, genicular lobes large; caudal tibiae with an apical and 

 nine other spines on the' external margin, internal margin with ten 

 spines. 



Tyi^e of the genus. — Coryacris diversipes, new species. 



CORYACRIS DIVERSIPES, new species. 



Types. — Male and female; Corumba, Matto Grosso, Brazil. Female 

 in March on highland. (H. H. Smith.) Cat. No. 12081, U.S.N.M. 



Size large ; form rather slender in the male, slightly more robust in 

 the female; surface of the pronotum and pleura impresso-punctate. 

 Head with its dorsal length slightly more than half the dorsal length 

 of the pronotum in the male, two-fifths the length of the same in the 

 female ; occiput very slightly arcuate, descending slightly in the inter- 

 ocular region, which is equal in width to about three-fourths that of the 

 fastigium; surface of the fastigium subhorizontal, the lateral margins 

 subarcuate when seen from the sides, when seen from the dorsum the 

 apex of the fastigium is seen to be acute-angulate, the margins slightly 

 bowed in both sexes and slightly blunter and the angle broader in the 

 female than in the male, fastigio-facial junction rounded in the female 

 but with a slight angle in the male, the line of the face distinctly but 

 not greatly retreating in both sexes, more pronounced, however, in 

 the male than in the female; frontal costa rather narrow, uniform, 



« Kopvg, signifying helmet; aKpii, signifying locust. 



