NORTH AMERICAN BOSTRICHIDAE 123 



N. Y. (Cornell) Agr. Expt. Sta. Mem. 101: 415; St. George, 1929, U. S. Dept. 



Agr. Farmers' Bui. 1582, pp. 6-8, figs. 8-12; Lesne, 1938, in Junk (pub.) Coleopt. 



Cat., pt. 161, p. 60 ; Brimley, 1938, Insects of North Carolina, p. 197 ; Anderson, 



1939, Wash. Acad. Sci. Jour. 29 (9) : 391 (larvae) ; Belkin, 1940, Ent. News 51: 



192. 

 Apate basalis Dejean, 1935, Cat. Coleopt., ed. 3, p. 309 ; 1936, ed. 3 rev., p. 334. 

 Apate humeralis Melsheimer, 1806, Catalogue of Insects of Pennsylvania, p. 129; 



Melsheimer, 1853, Catalogue of the described Coleoptera of the United States, 



p. 84. 



Male. — Brownish black to dark reddish brown, with humeri or base of 

 elytra reddish; antennae, palpi, and tarsi brownish yellow, the clypeus 

 often slightly reddish. 



Head slightly convex, without distinct median tubercles on front, 

 sometimes longitudinally grooved on front, densely, finely granulose, 

 with fine, longitudinal, parallel costae on occiput, sparsely clothed 

 with short, recumbent, inconspicuous hairs; clypeus vaguely convex, 

 densely, finely granulose, sparsely clothed with short, recumbent, in- 

 conspicuous hairs ; clypeal suture deeply depressed at middle, obsolete 

 on each side. 



Pronotum quadrate or vaguely wider than long, widest along mid- 

 dle; sides vaguely rounded, or parallel along middle, more strong^ 

 converging anteriorly, with a short, broad tooth near apical angles; 

 posterior angles broadly rounded ; surface sparsely clothed with short, 

 recumbent and semierect inconspicuous hairs on basal half and median 

 part of apical half, and long, erect hairs toward lateral margins on 

 apical half, finely, densely scabrous, with numerous broad, semierect, 

 rasplike teeth on apical half. 



Elytra at base subequal in width to pronotum at middle; sides 

 nearly parallel, conjointly broadly rounded at apices; surface glabrous 

 on disk, sparsely clothed with short, recumbent, brownish hairs on 

 apical declivity, coarsely, densely, irregularly punctate on basal two- 

 thirds; apical declivity with a few large, deep, foveolate punctures 

 on each side and between tubercles, smooth along sutural margins, 

 which are slightly, broadly elevated, the lateral margins strongly ele- 

 vated ; each elytron with two or three short, broadly rounded, smooth 

 costae at base, and with three costiform tubercles along anterior 

 margin of apical declivity, the tubercles rather short, and acute at 

 apices. 



Abdomen beneath densely, finely granulose, indistinctly punctate, 

 rather densely clothed with short, recumbent, whitish hairs, with a 

 few long, erect hairs on last visible sternite, which is broadly sub- 

 truncate at apex. 



Female. — Differs from the male in having the last visible abdominal 

 sternite slightly longer, and feebly, narrowly emarginate at the apex, 

 and the punctures on the apical declivity of the elytra smaller, more 

 numerous, and distributed over nearly all of the surface. 



Length 4-7 mm., width 1.5-2.5 mm. 



Type locality. — Of basilaris, along the Ohio, Mississippi, and Ar- 

 kansas Rivers ; since the type of basilaris is lost, the writer is desig- 

 nating a specimen in the United States National Museum, labeled 

 2 miles west of St. Louis, Mo., May 23, 1904, collected by W. V. Warner, 

 as the neotype. Of basalis, "Amerique Boreale"; location of type un- 

 known to writer. Of humeralis, Pennsylvania; type probably lost. 



Distribution. — This common species is widely distributed over the 

 eastern half of the United States. Material has been examined from 



