352 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



slightly less than width of frons; first segment equals next three, 

 second segment equals next two, club 0.21 by 0.07 mm. Eyes promi- 

 nent; frons wider than dorsal tip of beak, flat medially. Prothorax 

 at base one-fourth wider than long, middle narrower than base, apex 

 three-fourths as wide as base; basal lateral expansion lacking, sides 

 evenly converging to middle, then slightly rounded to strongly con- 

 stricted apex, apical lateral margin flared out; in profile dorsal surface 

 is slightly arcuate; punctation about 0.02 mm. in diameter, rather 

 deep, irregularly placed, interspaces wider basally and laterally; basal 

 fovea lacking. Elytra at humeri one-third wider than prothorax at 

 base, three times as long as prothorax, length to width as 5:4; 

 intervals about three times as wide as striae, flat, smooth, nearly 

 impunctate; striae fine, inner margin more pronounced than outer 

 margin. Scutellum triangular, 0.06 by 0.06 mm., with shallow median 

 furrow. Front femora four times as long as wide. Claws with acute 

 basal tooth. 



Material examined: One female compared with type by G. A. K. 

 Marshall and five other specimens. 



Known distribution: 



Panama: David (type BMNH); Porto Bello, Feb. 28, 1901, E. A. Schwarz 



(USNM). 



Apion (Trichapion) gracilirostre Sharp 



Figure 14,e,h,o,p 



Apion gracilirostre Sharp, Biologia Centrali-Americana. Insecta, Coleoptera, 

 Curculionidae: Apioninae, vol. 4, pt. 3, p. 57, pi. 2, fig. 22, 1890. 



Description: Length, 2.25 to 2.50 mm. 



Moderately robust. Black; pubescence fine, white, sparse, coarser 

 and denser on sides of mesothorax and metathorax. Male beak one- 

 fourth longer than head and prothorax, distinctly curved, slender, 

 basal third cylindrical, apical two-thirds depressed; dorsally polished 

 and with fine, sparse punctures, laterally with irregular rows of coarser, 

 denser punctures. Antennae inserted at basal fourth at distance from 

 eye four times as great as width of frons; first segment slightly shorter 

 than next five segments, second segment shorter than next two, club 

 0.23 by 0.07 mm. Eyes prominent; frons narrow, equal to dorsal tip 

 of beak, with a shallow median depression and a lateral row of con- 

 fluent punctures. Prothorax at base one-fourth wider than long, 

 middle about equal to base, apex seven-tenths as wide as base; with 

 moderate basal lateral expansion, sides expanded slightly from base to 

 middle, rounded to constricted apex; in profile dorsal surface nearly 

 flat, apex slightly depressed; punctation moderate, 0.03 mm. in 

 diameter, deep, interspaces slightly narrower than diameter of punc- 

 tures, alutaceous, flat; basal fovea deep, punctiform at base, with a 



