360 PROCEEDINGS OF THE NATIONAL MUSEUM voL.no 



dorsal surface moderately convex, flattened basaliy and apically; 

 punctation deep, 0.03 to 0.04 mm. in diameter, interspaces usually 

 about one-half as great as diameter of punctures, with a narrow 

 impunctate median area; basal fovea moderately deep, elongate, oval. 

 Elytra at humeri two-fifths wider than prothorax at base, more than 

 2.8 times as long as prothorax, length to width as 7.5 : 6; intervals 

 one-half wider than striae, moderately convex, smooth, alutaceous, 

 with one row of very fine, distant punctures, apparently glabrous; 

 striae deep, with one row of conspicuous scales. Scutellum rounded, 

 triangular, 0.06 by 0.08 mm., smooth. Front femora four times as 

 long as wide. Claws with acute basal tooth. 



Special male characters: Tibia 2 armed with a moderately long, 

 dentate mucro; tibia 3 armed with a moderately long, subangulate 

 mucro. 



Material examined: One male determined by Hans Wagner, 

 two broken specimens determined by Sharp, and one other male. 



Known distribution: 



Mexico: Tabasco: Frontera (type, BMNH). 



Guatemala: Guatemala City (BMNH). British Honduras: "M-tee" dis- 

 trict. May 25, 1906, Bowditch Collection (MCZ). 



Apion {Trichapion) pervicax Fall 



Apion pervicax Fall, Trans. Amer. Ent. Soc, vol. 25, p. 139, pi. 4, fig. 2, 14, 1898. 



Description: Length 1.4 to 1.6 mm. 



Moderately robust. Black, elytra slightly aeneous; pubescence 

 scant, fine, white, nearly uniform. Male beak four-fifths as long as 

 head and prothorax combined, moderately deflexed at middle, mod- 

 erately expanded laterally and ventrally at antennal insertion, 

 attenuate to apex; basal two-thirds finely punctured, with scant 

 pubescence, finely densely alutaceous, apical third smoother, more 

 shining. Female beak a little longer than head and prothorax com- 

 bined, moderately, evenly curved; basal fifth moderately stout, 

 attenuate to middle, apical half nearly cylindrical; basal fifth with 

 scant pubescence, densely, finely alutaceous, apical third polished, 

 finely punctured. Antennae inserted at distance from eye equal to 

 width of frons, of male at basal fourth of beak, of female at basal fifth; 

 first segment nearly as long as next two, second segment nearly as 

 long as next two, club 0.15 by 0.08 mm. Eyes slightly prominent; 

 frons moderately wide, with slight median sulcus and two lateral 

 rows of punctures. Prothorax one-fifth wider at base than long, 

 middle about equal to base, apex three-fourths as wide as base; sides 

 expanded laterally at base, slightly expanded to middle, rounded to 

 constricted apex; in profile dorsal surface nearly flat, apical third 

 slightly deflexed; punctation deep, 0.03 mm. in diameter, interspaces 



