296 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



Smith is slightly yellowish; laterally it is white, also the antennal club 

 of the male is about twice as long as wide and is clothed with nearly 

 uniform, long, erect pubescence. The pubescence of A. orioles, new 

 species, is unicolorous, nearly white throughout, and the antennal 

 club is about three times as long as wide and is clothed with short and 

 long pubescence intermixed. 



The A. griseum group is closely related to the A. simile and A. 

 proclive groups but is very distinct because of the male secondary 

 sexual modifications of the front tibiae. The A. spinitarse, A. punc- 

 tvUrostre, and A. submetallicum groups may have been derived from 

 this group. 



The females of A. nehraskense and A. novellum are unknown. 



Key to females of Apion griseum group 



1. Beak distinctly pubescent distad of antennal insertion 2 



Beak nearly glabrous beyond antennal insertion godmani Wagner 



2. Beak in dorsal view distinctly expanded at tip 3 



Beak in dorsal view not expanded at tip 4 



3. Beak moderatelj% densely pubescent to near middle; dorsal surface of pro- 



thorax and elytra clothed with yellowish pubescence becoming white 



laterally aiirichalceum Wagner 



Beak sparsely pubescent in basal third; pubescence unicolorous, whitish to 

 grayish sayi Gyllenhal 



4. Beak moderately densely pubescent to near middle . . . orioles, new species 

 Beak sparsely pubescent in basal third 5 



r>. Size 1.60 mil).; metasternum comparatively coarsely, sparsely punctured. 



parcum, new species 

 Size 2.00 mm. or more; metasternum comparatively finely, densely punc- 

 tured griseiim Smith 



Apion (TricJwpion) auriclialceuni Wagner 



Figure Q,a-d,l 



Apion {Trichapion) aurichalceum Wagner, Arch. Naturg. BerHn, vol. 78, p. 103, 

 1912.— McKeIvy, et al., Mexico Sec. Agr. Ganad. Foil. Tech., vol. 8, p. 37, 

 1951. 



Description: Length, 2.0 to 2.4 mm. 



Moderately robust; black, elytra strongly aeneous. Pubescence 

 long, fine, yellow on doreal surface, coarser and whitish laterally, some- 

 what denser at base of elytral interval 3, much denser on sides of 

 mesothorax and metathorax. Male beak slightly shorter than head 

 and prothorax, one-thu-d longer than prothorax; moderately curved; 

 in lateral view apical two-fifths nearly parallel; in dorsal view mod- 

 erately expanded at antennal insertion, attenuate to apical thu-d where 

 it is somewhat compressed, slightly expanded toward tip; sculpture 

 laterally in basal two-thirds deeply, coarsely punctured, finely punc- 

 tured dorsally, pubescent, moderately dull, slightly alutaceous, apical 



