178 



Divis. TII.-XIPHOCERIDES. 



Conophori, Serv. and Scudd. 



Antennae acuminate ; joints distinct. The face vertical or sub-oblique ; 



the front advanced between the antennae in the form of a short, blunt cone or 



pyramid, but not prolonged as in ConocephaUdes. It contains, according to 



the present arrangement, but two groups, Xiphocerini and Phymatini, and 



corresponds exactly with the Conophori of Serville and Scudder. 



A. Joiuts of the autcnuse more or less flattened Xipliocerini. 



A A . Joints of the autenufe terrete Phymatini. 



Group 6.-XIPH0CERINI. 



Xiplioceridce and Pamphagida. Scudd., Walk. 



Antenna3 acuminate; the joints distinct and more or less flattened. The 

 vertex flat, triangular; front advanced between the antennae in the form of a 

 short, triangular pyramid. It is represented in the United States by but one 

 genus, Rhomalea, which is by no means a true type of the group, but ap- 

 proaches in several respects the gigantic AcridiL 



RHOMALiEAl Biirm. 



Romalea, Serv. ; Dictyophorus, BruU^ ; Rutioderes, Westw. 



Large size. Vertex pyramidal, slightly produced in front of the eyes ; 

 margins raised. Face sub-vertical; frontal costa prominent, sulcate, not 

 reaching the clypeus ; lateral carinas obtuse, sinuous. Maxillary palpi short ; 

 ultimate joint longest, slightly obconic, obliquely truncate. Pronot'im long; 

 median carina very prominent; lateral carinas obliterated on the front lobes, 

 obtuse, but distinct on the posterior ; the three cross-incisions distinct, cutting 

 the median carina ; a fourth near the front margin on the sides ; sub-truncate 

 in front; posterior extremity prolonged, angled. Elytra and wings shorter 

 than the abdomen ; the former with two strong nerves dividing each into 

 three nearly equal fields. Abdomen carinated ; anal appendages of the 

 female large; sub-anal plate of the male triangular. Posterior femora but 

 moderately enlarged at the base, reaching the apex of the abdomen. An- 



