EUPLECTINI 73 



second, or discal fovea is the most basal of the foveae and gives rise to a discal 

 stria; the third and fourth are close together and give a paired appearance 

 since their striae arise laterally and unite along the basal rims of the foveae, 

 as in Thesium. Abdomen with subequal tergites and six sternites, of which 

 latter the first is very short, shorter than posterior coxae; second, third and 

 fourth sternites subequally long, evenly convex; fifth broadly emarginate; 

 sixth transverse. Metastemum convex, medio-posteriorly slightly impressed. 

 Tarsal claws very unequal and distinctive. An accessory claw less than half 

 as long as primary claw, and about one-half as wide, that is, very thick for 

 its length. Primary claw large, over twice as long as the accessory claw, and 

 instead of becoming narrower to an attenuated apex, holds its width to the 

 distal fifth where it is abruptly and ventrally acute, thus being apically inflated. 



macrodactylus (Fletcher). 1928. Mexico. Genotype. {Eurhexius) 



The remarks about to be made on Eurhexius are also pertinent to Fletcher- 

 exius and any wholesale consolidation of the eurhexoid aggregates will in- 

 volve the above genus as well. 



APORHEXIUS (Raffray, 1903) 



Pronotum with the lateral margins distinctly crenulated, as in the North 

 American Rhexidvas Casey. This character serves to separate Aporhexius from 

 Fletcherexius where the lateral pronotal margins are subentire save for a 

 crenulate-granulate area opposite the lateral pronotal foveae. 



Pronotum with the median longitudinal and transverse subbasal sulci 

 strongly formed, as in Fletcherexius and Eurhexius. This character separates 

 Aporhexius from Rhexinia, the only other neotropical eurhexiform genus with 

 distinctly crenulated pronotal margins. 



Male metastemum slightly sulcate medianly and this sex with the last 

 stemite impressed and medianly glabrous. 



Pubescence unusually dense. 



pubescens Raffray, 1903. Bolivia. Genotype. 



RHEXINIA (Raffray, 1890) 



Pronotal margins laterally crenulate, and with the longitudinal and trans- 

 verse sulci virtually absent or so poorly developed as to be just perceptible. 

 Head and pronotum confluently punctate and granular. Six visible sternites. 



angulata Raffray. 1890. New Grenada (Colombia?). Genotype. 

 versicolor Raffray. 1908. Guadeloupe, Leeward Islands. 



XHERIUS (Raffray, 1890) 

 cordicollis Raffray. 1890. Venezuela. Genotype. 



