NORTH OF MEXICO. 



287 



riety occurs in Tulare Valley, Cal., at the base of the hills on which the typical form is 

 found, in which the thorax and elytra are much more smooth and the costse of the elytra 

 represented by very faint longitudinal ridges ; as a variety it may be known as A. c o m - 

 press a, though, as in the rough and smooth forms of cos ti pen nis, I prefer to consider 

 it merely a local variety. I have seen specimens evidently belonging to this species, much 

 more robust and with the sculpture even more strongly marked. These are from Arizona, 

 and in the cabinet of Mr. II. Ulkc. 

 Length .GO— .90 inch. 



A. oaptiosa, black, shining, similar in form to A. locontei, and differing as follows: 



Head very finely and sparsely punctured, thorax more convex, less margined and scarcely punctured. Elytra 

 elongate oval, margin broadly rounded, disc entirely smooth and without trace of costse. Length .60-.80 inch. 



I have doubts whether this should be considered distinct from Locontei It appears to 

 be merely a variety, the result of a still further continuance of that obliteration of sculpture 

 seen in the variety of the preceding species called comjpressa. Doubtless intermediate 

 forms will some day be discovered warranting the union of this species with lecontei. 



Specimens in my cabinet arc from both sides (East and West) of the Tulare, several 

 hundred miles northward of Fort Tejon. 



A. puncticollis, (Euschides) Lee, New Spec. p. 111, No. 879. 



A very robust species, with elongate oval, very convex, smooth elytra, with a faint 

 marginal ridge. The thorax is broader than long, very convex, coarsely and densely 

 punctured, and sides strongly rounded and the margin distinct, sub-acute. 



Specimens have been collected in Oregon. 



Length .78 inch. 



A. eonsobrina, black, opaque, very robust, head coarsely punctured, thorax one-half broader than long, 

 feebly convex, coarsely and densely punctured, and the disc oonfluently punctured at the margin, sides broadly 

 rounded, margin moderately broad; anteriorly emarginate, angles acute, posteriorly feebly rounded, angles distinct, 

 not prominent. Elytra broadly obovate, very convex, margin scarcely evident, humeral angles distinct, not promi- 

 nent, base feebly emarginate; surface faintly and obscurely rugose. Length .(i(i inch. 



This is one of our most robust species, resembling the preceding somewhat in general 

 appearance. As compared with puncticollis, it is very much shorter and more robust, the 

 thorax less convex and punctured, and with sides more; broadly rounded, and with margin 

 much broader. The elytra are very broadly oval, convex, and suddenly declivous behind, 

 and very obtuse at apex. The bast; of the thorax is broadly rounded, the rounding start- 

 ing within the hind angles and not from the angles themselves. 



A. convexa, (Euschides) Lee, Smithson. Contr. Col. Ks. & N. M., p. 14, pi. 1, fig. 10. 



In this species the marginal line of the elytra is obsolete, except a very short carina, at 

 the humerus. The thorax is broader than long, moderately convex, very feebly punctured, 

 margin distinct though narrow, side moderately and base feebly rounded. Elytra elongate 



