Bruner: South American Acridoidea. . 97 



Externally the apical spine is presenl and almosl as prominenl as the 

 (.1 hers. The spines on the inner margin are hea\ ier, longer, and some- 

 what curved, ascompared with the outer ones. Las1 ventral segment 

 of male abdomen gently upturned, long, slender, and acuminate. 

 Cerci slender, acuminate, hirsute. Prosternal spine moderate^ 

 slender, long, acuminate, the apex directed gently to the front. 

 Interspace between the mesosternal lobes elongate, narrower than 

 the lobes themselves, the inner margins of which are evenly rounded. 



( General color as described above. Tegmina brownish ferruginous, 

 the dorsal margin a little paler, quite evenly, but faintly, conspersed 

 with fuscous blotches. Occiput, and posterior portion of cheeks, 

 together with the upper half of sides of pronotum and upper edges of 

 pleura, brown. byes dark castaneous. Tibial spines and the spiracles 

 black. 



Length of body, o", 27 mm., 9 , 38 mm.; of pronotum, c?\ 4-1 mm., 

 . . 6.5 mm.; of tegmina, cf, 23 mm., 9, 33-5 mm.; of hind femora, 

 cf, 16 mm., 9 , 23 mm. 



Habitat. — The collection contains three males, which were taken 

 at Para, Brazil, in July, and a single female labeled "Santarem" 

 (H. H. Smith). The types are in the collection of the Carnegie 

 M .'11111. 



Genus Adelotettix Bruner. 

 Adelottettix Bruner, Tire Horse Soc. Ent. Russicae, XXXIX, p. 476 (1910). 



The present genus is composed of several rather dull-colored locusts 

 of moderately large size. They seem to be confined to middle America, 

 representatives occurring from Yucatan to Peru and Brazil. Judging 

 from their general dull brownish color these insects live in the tropical 

 forests among fallen leaves, or upon the shaded trunks of trees. Only 

 females have thus far been examined by me. The species collaris 

 may be taken as the type of the genus. The following table will assist 

 in separating the known forms: 



Synopsis of the Species of Adelotettix. 

 .1. Tegmina rather sparsely veined, especially apically. 



b. Hind tibiae brunneo-testaceous, nine-spined on both edges. Pronotum 



collared with black. [Yucatan.] collaris Bruner. 



bb. Hind tibiae with apical half deeply red, seven- to eight-spined. Pronotum 



not collared with black. [Peru.] obscurus Bruner. 



A A. Tegmina profusely veined even on apical half. Hind tibiae vinaceous red, 

 seven-sained externally. [Para, Brazil.] brnnneus sp. nov. 



