118 PROCEEDINGS OF THE NATIONAL MUSEUM vol. xxxvi. 



Genus TROPINOTUS Serville. 



TROPINOTUS ANGULATUS Stal. 



1873. T[ropinotns] angulatus Stal, Ol'v. Kong. Vet.-Akad. Forh., 1873, no. 4, 

 p. 53. [Bahia.] 



Bonito, Pernambuco, Brazil. February, 1880. (A. Koebele; 

 collected on cotton.) One female. Chapada, Matto Grosso, Brazil. 

 April (2). (H. H. Smith.) One male, two females. Corumba, 

 Matto Grosso, Brazil. March, highland. One female. 



These specimens vary considerably in the length of the tegmina 

 and wings, but all agree in the distinct angles to the lateral carinse 

 of the pronotum. The maculations of the tegmina are also variable 

 in intensity and correspondingly in the presence or absence of those 

 weakly indicated in the more varied form. In one specimen the 

 proximal band alone is indicated distinctly and that by two macu- 

 lations, a larger one in the discoidal area and a smaller one in the 

 projection of the costal area. The distal bands are very faintly 

 indicated in this specimen and chiefly by infuscations along the 

 sutural margin. 



TROPINOTUS ATTENUATUS, new species. 



Types. — Male and female. Chapada, Matto Grosso, Brazil. Sep- 

 tember. (H. H. Smith.) Cat. No. 12083, U.S.N.M. 



Closely allied to T. gracilis Bruner with a topotypic male of which 

 the new species has been compared," and from which it difl'ers in the 

 slightly greater size, the more distinctly sulcate frontal costa, the 

 shorter and blunter subgenital plate and in the lesser number of 

 spines (twelve to fourteen) on the margins of the caudal tibiae. 



Size medium; form elongate, very slender. Head with its dorsal 

 length contained slightly more (male) or less (female) than three 

 times in the dorsal length of the pronotum; occiput very slightly 

 arcuate, fastigium horizontal, a distinct median carina present on 

 both; angles of the fastigium slightly acute, the margin slightly 

 elevated, interspace between the eyes very slightly less than the 

 greatest fastigial width; fastigio-facial angle moderately rounded, 

 the face considerably retreating; frontal costa narrowed dorsad, sub- 

 equal from between the antennae to the clypeal suture in the male, 

 very slightly expanding in the female, slightly but appreciably con- 

 stricted at the ocellus, sulcate from between the antennae to ventrad 

 of the ocellus; lateral facial carinas prominent, considerably diverging 

 ventrad; eyes ovate, not very prominent, in length somewhat ex- 

 ceeding that of the infra-ocular portion of the genae; antennae about 

 equal in length to the head and pronotum, depressed, sub-ensiform. 

 Pronotum with the greatest width contained, more than twice in the 



a Sao Paulo, Brazil, Sept. 14, 1900 (Hempel). 



