EUPLECTINI 107 



26, 1936, at Armour 8; July 28, 1936, at Zetek 3; July 29, 1936, at Pearson 4; 

 July 30, 1936, at Armour 10. 



This distinct species appears to be rather generally distributed in the center 

 of the island. It is near Euplectus, from which it is readily separable by the 

 subequal tergites, lack of basal tergite carinae, and other features. In Raffray's 

 1908 key, it runs to the neighborhood of the Chilean Pteroplectus, but cannot 

 be confused with this genus as the latter has a strong, entire prosternal carina 

 and seven stemites in the female. The genus as now constituted has but the 

 one species: 



subdendrus new species. Panama Canal Zone. 



ADROGASTER (Raffray, 1890) 

 longipennis Raffray. 1890. Brazil. Genotype. 



ACOTEBRA (Reitter, 1881) 

 sinioni Reitter. 1893. Chile. Genotype. 



TOMOPLECTUS (Raffray, 1898) 

 cordicollis Raffray. 1898. Mexico. Genotype. 



ACTIUM (Casey, 1886) 



Casey (1886, 1887, 1893, 1897, 1908) 



Brendel and Wickham (1890) 



Raffray (1898, 1904, 1908) 



Bowman (1934) (genotype Actium pallidum Casey) 



Proplectus Raffray, 1890 (Trichonychini) a synonym of Actium. 



This is a large genus of some seventeen species, of which only three are 

 found south of the Rio Grande river. The center of distribution therefore ap- 

 pears to be in the United States, especially California, where some nine or ten 

 species are known. Raffray (1908) thinks that this genus replaces Trimium 

 (Aube, 1833) in the western hemisphere, the latter genus being abundant and 

 typical in the European palaearctic fauna. Actium seems to be rather centrally 

 located in the tribe, in general much more specialized than the Euplectoid 

 genera, and not so specialized as the Melboid genera. The three neotropical 

 species are neither known from the eastern regions of South America nor from 

 the Antilles, and hence it would seem probable that the species of Actium have 

 spread eastward from California into the eastern United States, and secondly 

 southward down the Rocky Mountain-Andean chain as far as Chile. 



In general the eyes are well formed in both sexes. Vertexal foveae are 

 always present and may be nude or pubescent. Antennae are eleven-segmented, 

 with the club composed chiefly of the eleventh segment, although the length 

 of this segment varies in the subgenera from as long as the eighth to tenth 

 combined, to as long as the sixth to tenth combined. The maxillary palpi are 



