ACRIDID-E. 683 



Male. Greenish, slender, yellow beneath. Head smooth, slightly 

 elongated ; vertex with two curved brown lines which are approximate in 

 front; lip flat, fusiform; front slightly oblique, with four slight keels; 

 inner keels nearly parallel ; outer keels diverging towards the face ; an 

 oblique brown streak between each eye and the face. Eyes testaceous, 

 straight in front, very much rounded on the hind side. Aniennse piceous, 

 tawny at the base. Prothorax very finely scabrous, partly brown ; disk 

 flat, with three distinct keels ; transverse impressed lines very slight ; fore 

 border, sides and hind border slightly rounded. Prosterual spine stout, 

 conical, moderately long, about twice as broad as thick. Legs ferruginous, 

 yellowish beneath ; hind femora as long as the abdomen ; hind tibiae red, 

 much shorter than the hind femora, their spines with black tips. Length 

 of the body 9 lines. 



The wings are rudimentary in the specimen described, which is not fully 

 developed. 



a. Orizaba, Mexico. From M. Salle's collection. 

 South America. 



A. Prothorax with two yellow stripes. . - - - vorax. 



B. Prothorax with no yellow stripes. 



a. Hind tibise red. ------ dominalor. 



b. Hind tibiae green. - - . - alienus. 



In C. dominator the genus Caloptenus attains its largest dimensions. 



C. alienus is described from an immature specimen ; it differs from the 

 typical form, and has some affinity to Acridium. 



17. Caloptenus vorax. 

 vorax, Sauss. Rev. Zool, xiii. 162. 

 Brazil. 



18. Caloptenus domixatoe. 



Mas. Ferrugineus, sat validus ; fastigium fere rotundum ; prothorax 

 scaler, disco sublriearinato fere piano, margine poslico rotundalo ; 

 prosterui spina robusla, conica, subtransversa ; femora postica abdo- 

 niine paullo longiora, inius nigro uniplagiata, siiblus nigra, fascia 

 subapicali picea ; tibite postica riifce, spinis pallida Jlavis apice 

 nigris ; al<e aniicte cinerete, corpore mullo longiores. 



Male. Ferruginous, rather stout. Head smooth, moderately long ; 

 tip of the vertex depressed, nearly round ; front thinly punctured, with 

 four slight keels which diverge towards the face. Eyes lurid, elongate- 

 elliptical, much rounded on the hind side. Prothorax scabrous; disk 

 nearly tlat, with three slight keels; transverse impressed lines distinct; 

 fore border and sides slightly rounded, the former slightly notched ; hind 

 border more rounded. Prosternal spine stout, conical, slightly transverse, 

 moderately long. Hind femora a little longer than the abdomen, black 

 beneath, with an elongated black patch on the inner side, and with a piceous 



