138 Annals of the Carnegie Museum 



Synopsis of the South American Species of Paradichroplus. 

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



b. General color yellowish, the dorsum of the pronotum and abdomen dusky. 



Head black bilobus Giglio-Tos. 



bb. General color greenish olivaceous, the dorsum of the pronotum and abdomen 



light. Head concolorous brunneri Giglio-Tos. 



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



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



c. Larger (9. 22-25 mm.). Moderately robust, the head large. General 



color ferruginous, the abdomen with four or six basal segments 



twice spotted at middle with black bipunclatus Giglio-Tos. 



cc. Smaller (9, 18-21 mm.). Rather slender, the head normal. Color 

 variable. 

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

 external disk of hind femora infuscated or obscure. 



rubripes sp. nov. 

 dd. Color more or less olivaceous. Hind tibiae greenish; internal and 

 external disk of hind femora not especially infuscated. 

 e. Genicular area of hind femora with black lunules. 



fusiformis Giglio-Tos. 

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



lunules geniculates sp. nov. 



bb. Hind tibiae expanded apically and with the lateral edges acute. 



aberrans Giglio-Tos, 



193. Paradichroplus rubripes sp. nov. 



Very similar in general form to P. geniculates, but noticeably 

 larger. General color testaceo-ferruginous, the hind femora internally 

 rather strongly infuscated, externally in the female strongly tinged 

 with olivaceous; the tibiae orange-red. 



Head of moderate size, about the width of the anterior edge of the 

 pronotum; eyes a little prominent, oval (9), a little longer than the 

 front edge of the cheeks below them, subglobular (o 71 ), nearly twice 

 the length of the anterior edge of the cheeks. Vertex as in geniculates, 

 the frontal costa rather wide and broadly sulcate, more or less punc- 

 tured above the ocellus, in both sexes ending above the base of the 

 clypeus. Antennae slender, filiform, quite noticeably longer than 

 head and pronotum together. Pronotum expanding posteriorly, 

 viewed laterally tumid anteriorly; transverse sulci quite prominent, 

 hind lobe closely and minutely punctulate, the median carina faint, 

 most apparent, on the posterior portion; hind margin gently and 

 broadly emarginate. Tegmina minute, narrow, lateral, a very little 

 surpassing the hind margin of the first abdominal segment. Hind 



