8 Anxals of the Carnegie Museum. 



3. Masyntes chapadensis sp. now 



This insect is most closely related to M. horeUii Giglio-Tos, from 

 which it differs chiefly in the shorter hind femora and the entire, 

 instead of excised, middle of the hind margin of the pronotum. In 

 color chapadensis differs from borellii by having the front, labrum, and 

 clypeus dull brown, instead of yellowish; the median carina of the 

 pronotum is concolorous, instead of yellow. The tegmina and wings 

 are also decidedly shorter in the present species than in the one with 

 which it has been compared. 



Length of body, o 71 , 14 mm., 9 , 20 mm.; of pronotum, d", 2 mm., 

 9 , 2.3 mm.; of tegmina, o 71 , 2.7 mm., 9 , 2.15 mm.; of hind femora, 

 cf. 10.5 mm., 9, 12.5 mm. 



Habitat. — There are specimens at hand from both Chapada and 

 Corumba, Brazil. They were taken during February and April. 

 The types are in the Carnegie Museum. 



Family TRUXALID/E. 



Representatives of the family Truxalida? are widely distributed 

 over the surface of the earth, although no single continent seems to 

 be greatly favored in this dissemination. Under these conditions it 

 is needless to state that there are numerous genera and species now 

 known and new ones continually being discovered. The present 

 collection contains several of these latter, as may be seen by referring 

 to succeeding pages. 



Genus Hyalopteryx Cha.rpentier. 

 Hyalopteryx Charpentier, Orthopt. Descr. et Depict., pi. XLVI (1845). 



The present genus is confined to South America, where its repre- 

 sentatives abound in Brazil, eastern Bolivia, and Paraguay. 



4. Hyalopteryx rufipennis Charpentier. 

 Hyalopteryx rufipennis Charp., Orthopt. Descr. et Depict., pi. XLVI (1845). 



Habitat. — Chapada, near Cuyaba, Matto Grosso, Brazil, a single 

 female (II. H. Smith), January. 



The synoptic table given by me in my List of Paraguayan Locusts 

 (Proc. l\ S. Xat. Mus., XXX, p. 623) runs this insect as above, 

 which is evidently correct. 



