SUBGENUS TRICHAPION — KISSINGER 375 



cence white, on dorsal surface very fine, sparse, inconspicuous, under 

 eyes, on sides of prothorax, mesothorax, and metathorax longer, 

 coarser, and denser. Beak of male shorter than head and prothorax 

 combined, one-fourth longer than prothorax, slightly curved, more 

 noticeably so toward apex; basal third stout, subcylindrical, not ex- 

 panded laterally at antennal insertion, apical two-fifths subcylindrical, 

 slightly depressed at tip; basal half with strong punctures bearing 

 scales; apical half and dorsal surface with, fine pimctures. Beak of 

 female slightly shorter than head and prothorax combined, three- 

 fiJths longer than prothorax, slightly, evenly curved; nearly cylindrical 

 beyond antennal insertion; glabrous and polished beyond antennal 

 insertion, with sparse, minute punctures in that region, basal region 

 with sparse pubescence. Antennae inserted at distance from eyes one- 

 half greater than width of frons, of male slightly behind basal third, of 

 female slightly behind basal fourth; first segment of male slightly 

 longer than next two, of female slightly longer than next three; 

 second segment equals next two; club 0.21 by 0.07 to 0.27 by 0.09 mm . 

 Eyes slightly promiment; frons equals width of dorsal tip of beak, flat 

 medially, sometimes with trace of median sulcus. Prothorax with 

 basal lateral region slightly anterior to basal margin prominent on 

 either side of middle; at base one-fourth wider than long, middle as 

 \vide or slightly wider than base, apex seven-tenths as wide as base; 

 sides beyond basal lateral expansion diverging slightly to middle, 

 rounded to constricted apex; in profile dorsal surface flat, immediately 

 at base strongly deflexed downward; punctation 0.03 mm. in diameter, 

 shallow, interspaces generally as wide as punctures, strongly aluta- 

 ceous; basal fovea very deep between basal prominences, extends 

 about one-third length of prothorax. Elytral sides at middle above 

 ninth stria with more or less distinct depression; elytra at humeri 

 two-fifths wider than prothorax at base, three times as long as pro- 

 thorax, length to width as 7 : 5 to 4 : 3; intervals flat, a httle more 

 than twice as wide as striae, hi part with two rows of scales; striae 

 deep, rather fine. Scutellum triangular, 0.08 by 0.06 mm., with deep 

 median furrow. Front femora about 3.7 times as long as wide. 

 Claws with acute basal tooth. 



Special male characters: Tibiae 2 and 3 armed with short, blunt 

 mucrones. 



AIateeial examixed: Specimens determined by J. Balfour-Browne 

 and six other specimens. 



Kxowx msTRiBrxiox': 



Argkxtina: Piovince of Bueno3 Aires (type) ; Santa Fe, Rio San Javier, Estancia 



La Noria, Dec. 16, 1911, to Jan. 5, 1912, G. E. Bryant (BMXH). 

 Paraguay: Independencia, June 19, 1951 (DGK). 

 Brazil: Rio de Janeiro. 

 4836G1— 59 9 



