Bruner: South American Acridoidea. 65 



than long. Pleura strongly punctate. Tegmina coriaceous, having 

 rather more the appearance of being punctate than close- veined, the 

 apex broadly rounded, not reaching the apex of the abdomen. Ab- 

 domen short, tapering, the valves of ovipositor straight, slender, more 

 or less hirsute, and somewhal similar to the cerci, the upper pair some- 

 what the stronger and longer. Hind tibia? and tarsi rather densely 

 hirsute, t he former pro\ ided with seven spines on both sides, the latter 

 with the second joint a little longer than the first. Prosternal spine 

 robust, short. 



( ieneral color brownish olive, the sides of pronotum above and the 

 tegmina along the discal field provided with a pale testaceous or dirty 

 white band. Antennae blackish above, reddish beneath, with the 

 black encroaching inwardly below. The hind femora are of a paler 

 olive-green and beautifully marked externally near the base by bright 

 Mood-red blister-like patches, which give to the whole insect a very 

 notable appearance. 



Length of body, 9 , 29 mm., of antenna', 14 mm., of pronotum. 9 

 mm., of tegmina, 15 mm., of hind femora, 18 mm., of hind tarsi, 10 mm. 



Habitat. — A single female specimen is at hand from Bartica. 

 Demerara, British Guiana, where it was taken by R. J. Crew. (Coll. 

 L. Bruner.) 



100. Nautia vitta-genae Bruner. 

 Nautia vitta-gena Bruner, Biol. Cent. Amer. Orthopt., II, p. 24.5 (1907). 



As shown by the synoptic table of the species of this genus, as 

 published in the Bioloeja Centrali- Americana, the present species is 

 most closely related to the one just described. Besides the differences 

 mentioned there it varies from N. ornatipes in having the antennae, 

 which are black, linear, instead of subensiform; in the much shorter 

 and more closely punctate pronotum, the sides of which are plainly 

 longer than high; in having the tegmina fully as long as the abdomen; 

 in the uniform coloration of the hind femora; in the reddish, instead 

 of olivaceous and fuscous, hind tibiae and tarsi; in having the pale 

 longitudinal line on the tegmina dark pink, bordered narrowly above 

 and below, instead of pale testaceous or dirty white; and in having 

 the eyes much more prominent. The present species has the fastigium 

 of its vertex decidedly depressed and much slenderer than in the species 

 with which it has been compared. 



Cerci of male very robust basally, directed posteriorly, so that the 

 upp< r edge of the basal two-fifths lies parallel with the body, the lower 



