358 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



sided throughout; in dorsal view shghtly expanded at antennal inser- 

 tion, attenuate to apical third, there slightly compressed, tip parallel; 

 alutaceous, basal two-thirds very sparsely pubescent, sparsely 

 punctured, tip smooth. Beak of female shorter than head and 

 prothorax combined, slightly longer than beak of male and more 

 slender, moderately curved; nearl}^ cylindrical, in side view very 

 slightly attenuate toward tip; nearly glabrous, smoother and more 

 shining than that of male. Antennae of male inserted at basal fourth 

 of beak at distance from eye one-third greater than width of frons, of 

 female inserted at basal fifth at distance from eye equal to width of 

 frons; first segment equals next two; second segment shorter than 

 next two; club 0.16 by 0.06 mm., eyes prominent; frons equals dorsal 

 tip of beak, with indistinct median furrow. Prothorax slightly wider 

 than long, middle slightly wider than base, apex 0.85 as wide as 

 base; sides beyond slight basal lateral expansion expanding to widest 

 point at middle, rounded to slightlv constricted apex; in profile 

 dorsal surface slightly arcuate; punctation 0.02 mm. in diameter, 

 shallow, interspaces much greater than diameter of punctures, 

 minutely alutaceous; basal fovea shallow, punctiform. Elytra at 

 humeri two-fifths wider than prothorax at base, 2.75 times as long 

 as prothorax, length to width as 9 : 6.5; intervals flat, intervals 2 and 

 4 more than three times as wide as striae, other intervals somewhat 

 narrower, with one row of indistinct punctures, surface smooth ; 

 striae shallow, very fine. Scutellura narrowly elongate-triangular, 

 0.08 by 0.04 mm., convex. Front femora 3.6 times as long as wide. 

 Claws with acute basal tooth. 



Special male characters: Tibiae 2 and 3 armed with short mucrones. 



Types: Holotype male (USNM 64129), Tam.pico, Tamaulipas, 

 Mexico, December 12, E. A. Schwarz. Allotype female, same data 

 as holotype (USNM). 



Apion {Trichapion) nitidirostre Sharp 



Figure 15,e,f 



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

 Curculionidae: Apioninae, vol. 4, pt. 3, p. 49, 1890. 



Description: Length, 1.88 mm. 



Robust. Black, elytra faintly bluish; dorsal surface of prothorax 

 and elytra nearly glabrous, sides of mesothorax and metathorax with 

 dense, white, fine scales. Beak of female longer than head and 

 prothorax combined, nearly two times as long as prothorax, moder- 

 ately, evenly curved; stout and nearly parallel-sided in basal one-fifth, 

 then attenuate, apical three-fourths nearly cylindrical; polished and 

 shining throughout, slightly punctured and minutely pubescent in 

 basal fourth; apical three-fourths impunctate, bare. Antennae 



