430 Annals of the Carnegie Museum. 



black. Rest of insect as characterized for the genus. Hind tibiae 

 numerously spined, ranging from 21 to 25 on both margins, the inner 

 row much larger and alternating in size. 



General color above brownish olive, below together with the face, 

 lower margins of the pronotum, and legs, greenish yellow. Hind 

 femora with apical portion fasciate with fuscous, the longitudinal 

 carinse minutely serrate, infuscated. 



Length of body, 9 , 20 mm., of hind femora, 12.5 mm. 



Habitat. — Rio Sapao, Bahia, Brazil, a single female, where it was 

 taken January 30, 1908, by J. D. Haseman. The type is in the 

 Carnegie Museum. 



Family PROSCOPID^E. 



The locusts which comprise the present family, with a single 

 exception, Taxiarchus septentrionalis Bruner from Costa Rica, Central 

 America, are confined to the South American continent, where the 

 various representatives are to be found from the Isthmus of Panama 

 to middle Argentina and Chile, and from the Atlantic to the Pacific 

 oceans. As a group these insects are very distinct from all other 

 locusts, but possibly bear the nearest resemblance to some of the 

 representatives of the Eumastacidae, which latter family is also 

 represented to a limited degree over the same territory. The general 

 body structure of the Proscopidaa is more nearly that of some of the 

 slenderer apterous Phasmoidea than of other locusts. None of them 

 are fully winged, and representatives of but two genera, so far as at 

 present known, viz: Anchotatus and A stroma, exhibit traces of these 

 organs. 



The material contained in the collections now being studied and 

 which forms the basis of the present paper represents several genera 

 and nearly a score of species. Three of these, and possibly a fourth, 

 seem to be new to science and are described herewith. 



In the separation of these insects no single set of characters thus 

 far employed by the various authors who have studied them seem to 

 be entirely dependable. Vertex characters, length of antennas, and 

 of the basal joint of these organs, comparative form and prominence 

 of the eyes, form of head, the characters on the pronotum, and position 

 of the anterior legs, hind tibiae and their spine characters and number, 

 — all of these seem to vary so much from the rule as laid down for 

 the several genera and species that they hardly prove satisfactory 

 diagnostic characters. 



