384 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



more shining. Antennae inserted at distance from eye one-half 

 greater than width of frons, at basal third of beak; first segment 

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

 0.15 by 0.07 mm. Eyes slightly prominent; frons moderately wide, 

 with a slight median depression and a lateral row of four moderate 

 punctures. Prothorax at base one-third wider than long, middle 

 slightly narrower than base, apex three-fourths as wide as base; 

 sides moderately expanded laterally at base, nearly parallel to mid- 

 dle, apex broadly constricted; in profile dorsal surface slightly evenly 

 arcuate; punctation 0.03 mm. in diameter, deep, interspaces variable, 

 generally less than diameter of punctures; basal fovea deep in middle, 

 short. Elytra at humeri one-half wider than prothorax at base, 

 3.3 times as long as prothorax, length to width as 5:3.3; intervals 

 nearly twice as wide as striae, nearly flat, with a single row of fine 

 punctures bearing fine scales; striae narrow, deep. Scutellum 

 triangular, 0.06 by 0.04 mm., with slight median furrow. Front 

 femora 3.5 times as long as wide. Claws with acute basal tooth. 



Special male characters: Tibiae 2 and 3 armed with angulate 

 mucrones. 



Material examined: One male determined by Hans Wagner and 

 27 other specimens. 



Known distribution: 



Mexico: "Mexico" (type, BMNH); Dislrito Federal: Atcapotzalco; Tacuba; 

 Tlalpam (USNM). 



Remarks: Material in the U. S. National Museum is recorded as 

 occurring "on bean." 



Apion {Trichapion) rostrum Say 



Figure 19,i,j 



Apion rostrum Say, Journ. Acad. Nat. Sci. Philadelphia, vol. 5, p. 253, 1826. — Say, 

 Descriptions of North American curculionides and an arrangement of some 

 of our known species agreeably to the method of Schoenherr, p. 6 — Smith, Trans. 

 Amer. Ent. Soc, vol. 11, p. 63; fig. 16, 1884.— Fall, Trans. Amer. Ent. Soc, 

 vol. 25, p. 151, 1898.— Pierce, U. S. Dep. Agr. Bur. Ent. Bull. 100, p. 75, 

 1912. — Blatchley and Leng, Rhynchophora or weevils of northeaster!' 

 America p. 81, 1916. — Bleasdell, Iowa State Coll. Journ. Sci., vol. 11, p. 110, 

 1937.— Bissell, Journ. Econ. Ent., vol. 33, p. 846, 1940.— Frost, Journ. New 

 York Ent. Soc, vol. 53, p. 221, 1945.— Tuttle, Ann. Ent. Soc. Amer., vol. 47, 

 p. 305, 1954. 



Apion scrobicolle Gyllenhal, in Schoenherr Genera et species curculionidum, vol. 

 5, p. 374, 1839.— Wencker, L'Abeille, vol. 1, p. 121, 1864.— Wagner, 

 Miinchener Kol. Zeitschr., vol. 3, p. 304, 1906-08; Genera insectorum. 

 Coleoptera, fam. Curculionidae: subfam. Apioninae, fasc. 130, p. 84. 



Description: Length, 2.5 to 3.0 mm. 



Robust. Black; pubescence scant, fine, white, more conspicuous on 

 sides of mesothorax and metathorax. Male beak as long as head and 



