1S80.] J-^-L [11(11-11. 



tra oblong, sides nearly parallel, moderately deeply striate, intervals feebly 

 convex and sparsely obsoletely punctulate. Body beneath smooth. Length 

 .48 —.50 inch ; 13—12.5 mm. 



Sexual characters as in furvus. The female is much less shining than 

 the male and the fine punctuation of the intervals much less distinct. 



This is the species which has heretofore borne the name nigritd and for 

 which Chaudoir suggested the name Lecontel. The Kirbyan description 

 will fit equally well either to the present species or the true nigrita and I 

 prefer to adopt the above name rather than suggest a new one. 



Occurs in Pennsylvania, Vancouver and Canada (Kirby) . 



18. A. agricola Say. Form oblong, moderately robust, black, shining. 

 Thorax broad, base and apex equal, sides moderately arcuate, hind angles 

 rectangular, not prominent, margin narrowly depressed, basal impressions 

 well defined, linear, disc convex, surface smooth with few punctures along 

 the base and margin. Elytra slightly oval, striae deep, intervals moderate- 

 ly convex, smooth and impunctured. Body beneath smooth. Length 

 .44 — .56 inch ; 11 — 14 mm. 



Sexual characters as in furvus. 



This is the most robust and convex species of the present group. 



Occurs in Missouri, Kanas and Georgia. 



19. A. Harrisii Lee. Oblong oval, black, shining. Clj^peus with twa 

 setigerous punctures each side. Thorax moderately broad, sides regularly 

 arcuate, widest at middle, hind angles very obtuse, side margin depressed 

 more widely behind, disc moderately convex, median line distinct, basal 

 impressions shallow, basal region and depressed margin punctulate. Ely- 

 tra moderately deeply striate, intervals slightly convex, smooth. Body 

 beneath smooth, a few punctures on the intercoxal process of the abdomen 

 and on the front and posterior portions of the metasternura. Length .44 — 

 .48 inch ; 11—12 mm. 



Sexual characters as in furvus. 



Occurs from Newfoundland to Pennsylvania. 



20. A, nigerrimus Dej. Thorax moderately convex, side margin very 

 slightly depressed at middle and not at all at the basal angles, the basal im- 

 pressions are feeble, shallow and but little punctulate. The other charac- 

 ters are those of the preceding species. Length .44 inch ; 11 mm. 



Sexual characters as in furmis. 



Occurs in the New England and Middle States. 



31. A.nigritaDej. The description alreadj^ given of mierj)w?ic<a<MS applies 

 so exactly to this that I find no differences except, that in the present 

 species there are two clypeal punctures on each side while in that there is 

 but one. Length .50 inch ; 13.5 mm. 



Sexual characters as in furvus. 



The determination of the present form as the true nigrita Dej. {inter - 

 punctatxis % Lee.) is made from a specimen compared by Chaudoir with 

 Dej can's types. 



Occurs in the New England and Middle Slates. 



