EUPLECTINI 81 



Size less than four millimeters in length; lateral pronotal margins with 

 minute blunted denticles of equal size and shape ; four basal elytral 

 foveae not in definite pairs 2 



2. Antennae with segment III small, subobconic; IV to VIII transverse, 



laterally crescentric; IX and X quadrate; XI subcylindrical, very 



long cavifrons 



(2.6 mm.; Sao Paulo, Brazil) 

 Antennae with segments III to VIII moniliform, equal, much smaller 

 than IX or X; IX and X abruptly larger, subquadrate; XI ovate. . 3 



3. Metastemum medianly impressed; stemites with second medianly, 



triangularly impressed; third stemite broadly transversely im- 

 pressed; fourth sternite deeply medianly exacavated, the excavation 

 with carinated lateral margins ; fifth triangularly elevated each side ; 

 sixth entirely concave and apically sinuate. .. .Male abdominalis 



(3.7 mm.; Blumenau, Brazil) 

 Metasternum convex; sternites convex, with distal sternite apically 



emarginate Female abdominalis 



(2.9 mm.; Blumenau, Brazil. Note great size range!) 

 The excellent secondary sexual differences in abdominalis form a notable 

 exception for the genus. 



One species of the genus, Eurhexius putzeysi has been taken with ants 

 (Bruch, 1929) in Argentina. 



The species may be listed as follows: 



I 



longicornis Raffray. 1904. Brazil. 



parviceps Sharp. 1887. Panama. 



sexpunctatus Raffray. 1904. Brazil. 



trimiodes Sharp. 1887. Guatemala, {nee trimioides) 



ventralis Sharp. 1887. Panama. 



vestitus Sharp. 1887. Panama. Genotype? 



II 



simoni (Reitter). 1882. Brazil. (Rhexius) {nee simonis) 



III 



laevis Raffray. 1904. Brazil. 

 majorinus (Schaufuss). 1872. Brazil? 

 megacephalus Raffray. 1904. Brazil. 

 proeerus (Reitter). 1882. Brazil. {Rhexius) 



putzeysi (Schaufuss). 1879. Uruguay, (nee putzeisi, putzeitsi, etc.) 

 and Buenos Aires, Argentina con Solenopsis richteri 



Forel (Bruch, 1929). 

 quadrifoveatus Raffray. 1904. Brazil. 



