GONIACERINI 285 



GONIACERUS (Motschulsky, 1855) 



This is the largest neotropical genus. The six-segmented antennae have an 

 entirely different first segment than that of Listriophorus, as noted in the generic 

 key. The palpi apparently three-segmented. The integument is distinctive, con- 

 sisting usually of an anastomosing lattice of minute carinules to give a sub- 

 opaque alutaceous surface. The six stemites are subequal but notable in that 

 the first and second sternites are fused medianly, although laterally distinct. 

 As Raffray (1908) has pointed out, this is an interesting approach to the 

 Cyathigerini, a remarkably specialized tribe holding a single large genus 

 (Cyathiger) of the Indo-Malayan rain-forest. It is possible that the Cyathi- 

 gerini are ecological equivalents in the last-named tropical region, of the Gonia- 

 cerini of the other two great tropical areas. 



gibbus (Motschulsky). 1851. Obispo, Panama. Genotype. 

 setifer (Schaufuss). 1872. Brazil. (Metopioides) 

 anophthalmus Raffray. 1890. Blumenau, Brazil. 

 perforatus Raffray. 1890. Caracas and San Esteban, Venezuela, [nee 

 perforatue of Raffray, 1908) 



GONIACEROIDES (Raffray, 1917) 

 umbilicatus Raffray. 1917. Asuncion, Paraguay, Genotype. 



GONIASTES (Westwood, 1870) ; 



sulcijrons Westwood. 1870. Brazil. Genotype. 

 westwoodi Raffray. 1890. Brazil. 



ADROCERUS (Raffray, 1890) 

 cavicornis Raffray. 1890. Brazil. Genotype. 



