BRUNER : Sim in Ami RICAN Li m I 3TS. 163 



U. S. of Colombia, western Brazil, Ecuador, Peru, and Bolivia. In their 

 habits these insects arc more or less social, and frequently occur in 

 family groups. Sonic of the species are known to prefer special food- 

 plants, which they attack rather than other-,. Aside from the main 

 characters used for their separation into the two principal groups, as 

 indicated in the annexed synoptical table, the females of the various 

 forms are quite difficull to separate. On the other hand the males of 

 mosl species are very distinct and quite easily differentiated. About 

 a score of forms have thus far been recognized. 



VV. F. Kirby in his Synonymic Catalogue of the Orthoptera, Vol. 

 [II, p. 365, names the species scabra Thunberg as the type of the genus. 

 It seem s to me, however, that a species in which both sexes are described 

 should be chosen instead. Why not lake either viridicata or trilineata 

 oi Serville for this purpose, both of which were also included b\ 

 the author of the genus. 



Synopsis of the Species of Ei.-eoculora. 



.1 . Spines on the inner margin of the hind tibia? more or less strongly curved and 

 but little longer than those on the outer margin. Tegmina and wings 

 often abbreviated even in the males, always much shorter than the 

 abdomen, and with the apex of the former more or less rounded in 

 both sexes. Wings hyaline, or flavous. 

 b. Tegmina of males plainly shorter, often very much shorter, than the abdo- 

 men. 

 c. Tegmina and wings decidedly shorter than the abdomen. 



d. General color olivaceous. Hind femora of normal form. Hind 

 margin of pronotum acute or subacute. 

 e. Sides of pronotum marked much as in pulchella, viridicata and 

 allies. Tegmina pale-bordered throughout [Sta. Cruz 



de la Sierra, Bolivia] brachyptera sp. nov. 



ee. Sides of pronotum uniformly green. Tegmina not pale- 

 margined at the apex [State of Sao Paulo, Brazil]. 



arcuala Rehn. 

 dd. General color brunneo-testaceous. varied with piceous and black. 

 Hind margin of pronotum very obtuse-angled even in the male. 

 Hind femora short and robust [Chapada, Brazil]. 



brevipennis Bruner. 

 cc. Tegmina but little shorter than the abdomen. 



d. Smaller (cf. 28-33 mm.). Median carina of the pronotum viewed 



in profile straight [Corumba, Brazil] pulchella Rehn. 



dd. Larger (cf, 37 mm.). Median carina of the pronotum viewed 

 in profile arcuate [Santa Catherina, Brazil]. 



fruhstorferi Bolivar. 



