46 Annals of the Carnegie Museum. 



of stcrli, although it has the external margin of the hind tibia? armed 

 with nine or ten spines, he may be correct. But the inclusion of 

 nasica and falconia is undoubtedly in error. We now find before us a 

 new species, which must be assigned to the genus. We then still 

 have four species, which may be separated by the subjoined synoptical 

 key. 



Synopsis of the Species of Opsomala. 

 A. Antennae decidedly ensiform. Hind tibiae provided with g-io spines ex- 

 ternally. Tegmina narrowly acuminate. Wings rather strongly infus- 

 cated, or at least with obscure veins [Southwestern Brazil]., .sta-li Bruner- 

 A A. Antennfe only faintlj' ensiform, or subensiform. Hind tibiae seven- to nine- 

 spined externally. Tegmina subacuminate. Wings not greatly 

 infuscated, nor with especially dark veins. 

 B. Hind tibiae and their tarsi wholly pale coral-red. The abdomen 

 above testaceous. 

 C. Insect larger and more robust (cf, 34-35, 9, 40 mm.). General 

 color pale yellowish grass-green. [Brazil, Paraguay, and 



Bolivia.] coccineipes Bruner. 



CC. Insect smaller and rather slender (d^, 29, 9 , 36 mm.). General 



color pale bluish green. (Cayenne.) intermedia sp. nov. 



BB. Hind tibiae with a large green space basally. The abdomen above 

 blood-red (Brazil) riridis Serville. 



88. Opsomala coccineipes (Bruner). 



Arnilla coccineipes Bruner, Proc. U. S. Nat. Mus., XXX, p. 659 (1906); Ib., 



Biol. Cent.-Amer., Orth., II, p. 254 (1908). 



A single female of this locust is at hand from the Pro\ince del 

 Sara, Bolivia. It was taken in the month of October, 1913, by 

 Steinbach. C. M. Ace. No. 5058. 



Judging from the structure of the hind tibiae and femora, and from 

 personal experience while collecting in Paraguaj', I should say that 

 this insect is a denizen of open meadows and away from water. Pos- 

 sibly the same characteristics may be true of all of the species of this 

 genus. 



89. Opsomala intermedia sp. nov. 



A rather slender species, of a pale blue-green color, apparently inter- 

 mediate between the species coccineipes and viridis, as indicated by 

 the Synoptic Key given above. Head about as wide as the anterior 

 edge of the pronotum, the front rather strongly oblique, the fastigium 

 a little wider at base .than long, its sides a little rounded {&), or nearly 



