124 Annals of the Carnegie Museum. 



mm., 9 , 2.9 mm.; of tegmina, o 71 and 9 , 1 mm.; of hind femora, cf\ 

 7 mm., 9 , 9 mm. 



Habitat. — Chapada and Benevides, Brazil, in April (H. H. Smith). 

 Types in collection of the Carnegie Museum. 



Genus Parasitalces gen. nov. 



This genus is established for a medium-sized entirely apterous, 

 smooth-bodied locust, which reminds at first glance of a Sitalces. 

 A closer examination, however, soon discloses many important dif- 

 ferences, sufficient to place it in a distinct genus, as will be seen from 

 the subjoined diagnosis. 



General form elongate fusiform, rather strongly hirsute throughout, 

 very much so on tibiae and tarsi. Head rather large, fully as wide 

 as (9 ), or slightly wider (cf) than the anterior edge of the pronotum; 

 viewed in profile the front is moderately oblique in the female and 

 quite strongly so in the male; the occiput smooth and fairly long. 

 Eyes prominent, about as long as ( 9 ) or a little longer than (cf ) the 

 anterior edge of the cheeks, separated above by a space equal to the 

 diameter of the antennae in the females, narrower, almost linear in 

 the males; fastigium of moderate size, plainly wider than long, the 

 antero-lateral margin carinated, its anterior middle gently sulcate 

 and narrowly continuous with that of the frontal costa. Latter fairly 

 prominent above between the antennae, where it is broadest and nearly 

 thrice (cf) or at least twice (9 ) the width of the vertex between the 

 eyes, sulcate throughout and continued to the clypeus. Facial carinae 

 prominent, but little divergent below. Antennae filiform, twenty-two 

 jointed, somewhat longer than the combined length of the head and 

 thorax. Prothorax without lateral carinae, expanding on posterior 

 lobe, which is short and closely and minutely punctulate; anterior 

 edge broadly rounded, posterior margin truncated, both slightly 

 emarginate at middle. Pleura in advance of meso- and meta-coxae 

 closely punctulate. Auditory apparatus rather small, oval. Hind 

 femora with carinae smooth, about normal in form, the outer disk 

 regularly paginate, about as long as the abdomen in the female, a 

 very little exceeding it in the only male specimen at hand, which is 

 somewhat distorted. Outer margin of hind tibiae six- to eight-spined. 

 Interspace between the mesosternal lobes slightly transverse, plainly 

 wider than the lobes themselves. Prosternal spine short, minute, 

 located on a robust quadrate base. Male abdomen gently clavate,. 



