Feb., '05] ENTOMOLOGICAL NEWS. 39 



Aleoas vitticollis Stal. 



One male (March 7, 1903). 



This species was described from Sao Leopoldo, Rio Grande 

 do Sul, Brazil, and Montevideo, Uruguay. 

 Alenas gracilis Stal. 



One male (March 7, 1903). 



The difference between this species and A. vitticollis is very 

 apparent on comparing them, the slenderer build, more pro- 

 duced and acute fastigium and the form of the pronotum are 

 the principal characters which readilj'^ distinguish gracilis from 

 vitticollis. The original locality was Brazil. 



ZYGOCLISTRON- n. gen. 



Allied to the Aleuce and Vilemw, partaking of characters of 

 both, but probably more closely related to the former and the 

 genus Paralexias Giglio-Tos in particular. 



Form elongate, slender. Head with the fastigium acute, 

 sharply carinate, excavated ; frontal costa regularly expand- 

 ing from the base of the antennae to the clypeus ; facial carinse 

 diverging to the same extent and parallel to the costa. Pro- 

 notum rugoso-tuberculate ; median carina distinct, intersected 

 thrice ; ventral margin of the lateral lobes very slightly emar- 

 ginate. Intervals between the mesosternal and metasternal 

 lobes exceedingly narrow. Tegmina reaching the apex of the 

 abdomen ; area between the discoidal and ulnar veins with 

 numerous transverse veins mesad. Posterior femora with 

 very slight dentate points on the dorsal carina ; tibiae with 

 eight spines on the external margin ; second tarsal joint not 

 quite half as long as the metatarsus. Subgenital plate com- 

 pressed, produced into a moderately recurved process ; supra- 

 anal subequal proximad, acuminate distad ; cerci long, slender, 

 parallel in the proximal half, sharply incurved at the middle, 

 the apex directed caudad and acute. 

 Zygoclistron trachystictnnit n. sp. 



Type : S ; Sapucay. Paraguay. March 20, 1902. Hebard 

 collection. 



* Zvyov yoke, irXeiTo-pov bar. 

 yTpa^vs rough, otiktov punctjired . 



