Bruner : South American Acr idea. 71 



prominent between the antennae. Eyes quite strongly 

 convergent, and sometimes distant from the anterior edge 

 ol the pronot urn, 

 /. F"rontal costa obliterated on lower half of face. Antennae mi 



than twice the length ol the pronotum. The latter smooth. 



Eu-parnops Scudder. 

 ff. Frontal costa continued below the middle oi the face. An- 

 tenna' one-half longer than the head and pronotum com- 

 bined. The latter gently punctulate. . . Cornops Scudder. 

 dd. Angle of the posterior margin of pronotum incised or emarginate. 

 Tegmina not surpassing the hind femora. 

 c. Frontal costa percurrent, sulcate throughout. Fastigium oi th< 

 \ ii tex subhorizontal. 

 /. Prosternal tubercle large and broadly transverse, its apex 

 broadly emarginate. Hind margin of pronotum truncate. 

 Tegmina and wings much abbreviated, lateral. 



Eumaslusia Bruner. 



ff. Prosternal tubercle small, pyramidal, acute. Hind margin of 



pronotum obtusangulate. Tegmina and wings three-fifths 



the length of abdomen Maslusia Stal. 



ee. Frontal costa subobsolete below the ocellus, not sulcate. Fas- 

 tigium declivant Telratcenia Stal. 



.1.1 . Posterior tibiae not at all, or but little, expanded apically, the margins rounded. 



Copiocera Burmeister. 

 Genus Leptysma Stal. 

 Leptysma Stal, Recens. Orthopt., I, pp. 42, 85 (1873). 



At least a dozen distinct species of tropical American locusts are 

 referable to the genus Leptysma Stal. These insects are subaquatic 

 by nature, hence their haunts along the margins of streams, in swamps, 

 and on low, wet grounds, where rank grass-like vegetation abounds. 

 Although the present collection contains at least a half dozen 

 distinct forms, half of which are new, the lack of material precludes 

 the attempt to monograph the genus. The species marginicollis 

 Serville and mexicana Saussure plainly belong to a distinct genus 

 from the remainder of the forms referred here. 



103. Leptysma gracilis Bruner. 



Leptysma gracilis Brcner, Proc. U. S. Nat. Mus., XXX, p. 658 (1906). 



Habitat. — Specimens of this insect are at hand from Chapada, 

 Brazil (H. H. Smith). The type locality is Sao Paulo. Brazil (Hempel) . 



This is the next to the smallest of the known species, and, although 

 not fully characterized in the paper cited, is so characteristic that it 

 cannot be mistaken. 



