Bruner: South American A.cridoidea. L25 



the 1. 1-1 ventral segment triangular, with its apex entire; supra-anal 

 plate subquadrate, a little broader than long, the lateral ma 

 raised and gently convergenl caudad, the middle widely costate and 

 sulcate, abruptly lowered half way to the apical, which latter is trun- 

 cate. Cerci large, heavy, with a large il.it inwardly directed median 

 tooth sufficiently long to touch the apex of that from the opposite 

 cercus, the main prong also flat, somewhat twisted and gently bowed 



inwardly. 



171. Parasitalces sexnotata sp. nov. 



( ieneral color above brunneo-olivaceous becoming paler medio- 

 dorsally and caudad; below flavous, sides of head, back of eyes, and 

 upper portion of sides of pronotum, piceous; front, cheeks, and sides 

 of pronotum below the piceous band, pale yellowish white, more or less 

 tinged with green. Legs olive-green, the hind tibiae greenish glaucous, 

 the lunules and lower margin of hind femora tinged with ferruginous. 

 Sides of occiput and lateral margins of disk of pronotum conspicuously 

 marked with orange patches, three on a side, i. e., one on each side 

 of the occiput and two on each side of the disk of the pronotum. There 

 is also quite a conspicuous blood-red patch on the pleura in advance 

 of, and above, the insertion of the hind femora. Antennae flavous, 

 becoming somewhat infuscated apically. 



Length of body, cf , 14 mm., 9 , 20-22 mm.; of pronotum, cf , 2.6 

 mm., 9 , 3.5 mm.; of hind femora, cf , 8.35 mm., 9 , 1 1-75 mm. 



Habitat. — Chapada, Brazil, in April, three females and one male 

 (11. II. Smith). Types in the collection of the Carnegie Museum. 



Genus SCHISTOCERCA Stal. 



Schistocerca Stal, Recens. Orthopt., I, p. 64 (1873); Scudder, Proc. Amer. Acad. 

 Arts & Sci., XXXIV, p. 441 (1899). 



The genus Schistocerca is one of the most characteristic of the 

 American genera of locusts, or short-horned grasshoppers. Its repre- 

 sentatives are for the most part quite large, and rather showy and 

 striking in appearance. Quite a number of the species are counted 

 among the destructive locusts of their respective regions. Especially 

 is this last remark true with reference to the tropical and subtropii al 

 parts of the Americas, where such forms as S. americana, cancellata, 

 and paranensis are at times responsible for much injury to the agri- 

 cultural interests, and the destruction of the vegetation of the cattle- 

 ranges and even of the forests as well. The genus has been worked 



