SUBGENUS TRICHAPION — KISSDTGER 335 



0.09 mm. Eyes moderately prominent; frons slightly wider than 

 dorsal tip of beak. Prothorax at base slightly wider than long, 

 middle and base about equal, apex four-fifths as wide as base; sides 

 beyond slight basal lateral expansion expanding slightly to middle, 

 rounded to slight apical constriction; in profile dorsal surface slightly 

 arcuate; punctation deep, rounded, 0.04 mm. in diameter, inter- 

 spaces less than diameter of punctures, generally one-half as wide; 

 basal fovea deep, narrow, extending beyond middle. Elytra at 

 humeri one-third wider than prothorax at base, about three times as 

 long as prothorax, length to width as 4 : 3; intervals narrower at base, 

 not more than two-third wider than striae, flat, with one row of fine 

 punctures; striae deep, coarse. Scutellum triangular, 0.06 by 0.06 

 mm. Front femora 3.5 times as long as wide. Claws with acute 

 basal tooth. 



Special male characters: Tibiae 2 and 3 armed with moderately 

 long, dentate mucrones. 



Lectotype: I hereby designate as lectotype of this species the 

 male specimen (USNM 1263) labeled California, J. B. Smith Collection. 



Material examined: Lectot3rpe and five specimens. 



Known distribution: 



United States: California: No exact locality (USNM). Arizona: No exact 

 locality (CU); Santa Rita Mountains, July 18, 1938, R. I. SaUer (UK). 



Apion (Trichapion) centrale Fall 



Figure 12,b,h,i 



Apion centrale Fall, Trans. Amer. Ent. Soc, vol. 25, p. 151, 1898. — Bleasdell, 

 Journ. Sci. Iowa State Coll., vol. 11, p. 411, 1937. 



Description: Length, 2.1 to 2.4 mm. 



Robust. Black; pubescence white, fine, sparse, a little coarser 

 laterally and ventrally. Male beak as long as head and prothorax 

 combined, slightly, evenly curved , expanded laterally and ventrally at 

 antennal insertion, rather abruptly attenuate beyond that point, from 

 middle to apex nearly cylindrical, apex about two-thu'ds as wide as 

 base of beak; punctation coarse, sparse to apical third, pubescence 

 inconspicuous. Female beak a little longer than head and prothorax; 

 slightly, evenly curved, antennal insertion as in male; punctation 

 beyond antennal insertion sparse, fine. Antennae inserted at distance 

 from eye equal to width of frons, at basal fifth of beak; first segment 

 of male equal to next two, of female longer than next two; second 

 segment equals next two; club ranges from 0.24 by 0.10 to 0.27 by 0,12 

 mm. Eyes prominent; frons wide with a slight central depression, 

 laterally with two rows of punctures. Prothorax at base slightly 

 wider than long, at middle a little wider than base, apex three-fourths 

 as wide as base; sides in basal half slightly diverging to middle, 



