500 Annals of the Carnegie Museum. 



dd. General color greenish olivaceous, the dorsum of the pronotum and 

 abdomen pallid, not varied with fuscous, .brunneri Giglio-Tos. 

 A A. Hind tibiae provided with eight spines in the outer row. 



b. Hind tibiae of the normal form, their lateral edges not acute and expanded 

 toward the apex. Representatives denizens of woods or open fields 

 removed from swampy grounds. 

 c. Larger ( 9 . 22-28 mm.). 



d. Abdomen with 4 to 6 basal segments twice spotted at middle with 

 black. Posterior femora internally sanguineous. 



bi punctatus Giglio-Tos. 

 dd. Abdomen with basal segments not twice black-spotted at middle. 

 Posterior femora internally pallid, not sanguineous. 



olivaceous sp. nov. 

 cc. Smaller (9, 18-21 mm.). 



d. Color testaceo-ferruginous. Hind tibiae orange-red; internal and 

 external disks of hind femora infuscated or obscure. 



rubripes Bruner. 

 dd. Color more or less markedly olivaceous. Hind tibiae greenish; 

 internal and external disks of hind femora not especially 

 infuscated. 

 e. Genicular area of hind femora marked with black lunules. 



fusiformis Giglio-Tos. 

 ee. Genicular area of hind femora pale ferruginous, without the 



dark lunules geniculates Bruner. 



bb. Hind tibiae expanded apically and with their lateral edges more or less acute. 

 Representatives possibly subaquatic, or at least denizens of swampy 

 grounds and fitted for swimming. 

 c. Hind femora banded internally and externally with black or fuscous. 

 d. Smaller (9, 14 mm. long) [Rio Apa, Paraguay]. 



aberrans Giglio-Tos. 

 dd. Larger (9. 21 mm. long) [Puerto Suarez, Bolivia]. 



steinbachi sp. nov. 

 cc. Hind femora without fuscous bands both internally and externally. 



snbaquaticus sp. nov. 



124. Paradichroplus subaquaticus sp. nov 



A medium sized rather hirsute insect, in which the general color is 

 greenish olive, varied on the head and the pronotum with lines of dirty 

 white or pale testaceous. Hind femora unicolorous, unhanded; the 

 hind tibiae decidedly expanded apically, and with the edges somewhat 

 acute. 



Head moderately large, a little wider than the front edge of the 

 pronotum, the occiput short. Eyes prominent, large, a little longer 

 than wide, their greatest diameter being almost twice as long as the 



