NO. 1661. ON SOME BRAZILIAN GRASSHOPPERS— REHN. 121 



Genus COLPOLOPHA StSl. 



COLPOLOPHA OBSOLETA (Serville). 



1831. Tropinotus obsoletus Serville, Ann. Sci. Nat., XXII, p. 274. ["Cap de 

 Bonne-Esp6rance. ' '] 



Santarem, State of Para, Brazil. (H. H. Smith.) One male. 

 Tills specimen has been compared with an authentic female 

 specimen from Cayenne received from the late Doctor Saiissure. 



Genus HELIONOTUS," new. 



Allied to Draconata Pictet and Saussure^ from Colombia, but 

 differing in the prozona being shorter than the metazona, the an- 

 tennie being twenty-one jointed, the tegmina attingent dorsad, the 

 subgenital plate of the male acute, the caudal femora distinctly 

 spinose on the dorsal carina. It is immediately separated from 

 Colpolopha Stal by the strongly spinose lateral margins of the pro- 

 notum. 



Fastigium with the dorsum horizontal, not sulcate; frontal costa 

 precurrent, constricted ventrad of the ocellus where the line of the 

 face is slightly angulate; antennae twenty-one jointed. Pronotum 

 with the median carina cristate, ascending to the middle of the 

 metazona, caudal section of the same acute spiniform; transverse 

 sulci three in number, all deeply severing the median carina; lateral 

 angles strongly tuberculate( female) or acute spiniform (male), pro- 

 jecting laterad. Tegmina very short, attingent (male) or overlap- 

 ping (female), costal lobe very greatly developed; apex narrow, 

 sinuato- truncate. Ovipositor jaws of female very blunt. Sub- 

 genital plate compressed, the tip rostrate. Caudal limbs with the 

 angles and dorsal surfaces serrato-dentate ; caudal tibiae somewhat 

 sinuate, external margin armed with nine or ten spines including the 

 apical spine, internal margin with nine spines. 



Type. — Helionotus inirahilis, new species. 



HELIONOTUS MIRABILIS, new species. 



Types. — Male and female. Bonito, Pernambuco, Brazil. January, 

 1883. (A. Koebele.) Cat. No. 12084, U.S.N.M. 



Size medium (male) to large (female); form slightly compressed, 

 moderately slender in the male, obese and fusiform in the female; 

 surface of the thorax, except the venter, impresso-punctate, head and 

 abdomen much smoother. Head with the- dorsum a third (male) 

 or less than a third (female) the length of the pronotum; occiput 

 slightly arcuate, a very faint medio-longitudinal carina present; fastig- 

 ium horizontal, blunt lanceolate in the male when seen from the 

 dorsum, subtrigonal in the female, lateral margins slightly arcuate 



" 'HAioi, signifying sun; voroc,, signifying back. 

 b Mitth. Schweiz. Ent. Ges., VII., p. 341. 



