372 Annals of the Carnegie Museum. 



The insects, which comprise the present genus, are among the 

 long-horned grass-hoppers what the various species of the genera 

 Orphulella and Oxya are among the short-horned grasshoppers, or 

 locusts, the "common grasshoppers" of the grassy hillsides and 

 meadows. They occur in nearly all quarters of the globe, and are 

 fairly numerous in both species and individuals. Heretofore seventeen 

 species have been credited to South American regions, and now two 

 others are added. Very likely still others will be met with from time 

 to time as different sections of the country are visited and worked 

 over by collectors. These South American species may be separated 

 as follows: 



Synopsis of the South American Species of Conocephalus. 



A. Anterior tibiae armed below with five to seven spines. ' 



b. Ovipositor rarely longer than the posterior femora, but, if longer, then the 

 elytra are perfectly developed. 

 c. Cerci of the male heavy, the apex depressed, obtuse. 



d. Posterior femora below armed with a single spine or without any. 

 e. Fastigium of the vertex narrow; viewed from the front, the 

 lateral margins are subparallel. Tegmina in both sexes longer 



than the pronotum truncatus Redtenbacher. 



ee. Fastigium of the vertex wider; viewed from the front with the 

 lateral margins divergent. 

 /. Lateral lobes of the pronotum with their hind margin sinuate 



[Chili] vitiicollis Blanchard. 



ff. Lateral lobes of the pronotum with their hind margin nearly 

 straight. 

 g. Tegmina abbreviated, in the male a little longer than the 

 pronotum in the female. Ovipositor nearly straight 



[Galapagos Islands] exitiosus McNeill.^ 



gg. Tegmina perfectly developed or the ovipositor not straight. 

 h. Tegmina abbreviated, not entirely covering the ab- 

 ■^ domen. Ovipositor sickle-shaped. 



/. Anterior margin of the elytra infuscated. 



nemoralis Scudder. 

 ii. Anterior margin of the elytra not infuscated. 



propinquus Redtenbacher. 

 hh. Tegmina longer, entirely covering the abdomen. 

 Genicular lobes of the posterior femora bidentate. 



fasciatus de Geer. 



* The species strictoides Caudell, described from Paraguay, is also brachypterous 

 and related to both slrictus Scudder and exitiosus McNeill. [See Proc. U. S. Nat. 

 Mus., XXX, p. 242 (1906)]. It should be added to the list of South American 

 species of Conocephalus. 



