292 MEMOIRS ON THE COLEOPTERA 



eyes, the frontal foveee very deep, the triangle adjoining them ex- 

 ternally testaceous; antenna less stout than usual, fuscous, the first 

 two joints paler; prothorax differing greatly from the preceding, 

 fully two-fifths wider than long, perfectly parallel and widest at the 

 middle, the sides very evenly and rather strongly arcuate from apex 

 to the very broadly rounded basal angles; apex sinuato-truncate and 

 as wide as the base; surface very smooth and even, extremely finely 

 reflexed at the sides, the median stria extremely fine; base sparsely 

 punctate between the foveae, which are oval, deeply impressed and 

 sparsely punctate; elytra two-fifths longer than wide and two-fifths 

 wider than the prothorax, parallel, with broadly arcuate sides and 

 obtusely rounded apex in apical third, the sinus vestigial; striae 

 rather strong, deep, abrupt and groove-like, the scutellar rather short 

 and fine; discal puncture completely wanting; hind tarsi short, more 

 slender than usual though tapering, the first joint very slightly 

 longer than the second, the fifth as long as the first two. Length 

 (c? 9 ) 5.2-6.2 mm.; width 2.0-2.4 mm. Texas (Galveston 

 abundant) and Florida. New York, LeConte. [A. suturalis Lee.]. 



infuscatus Dej. 



Upper surface testaceous, with incomplete black vittae, the head darker 

 or black; discal puncture of the elytra always distinct; prothorax 

 not at all as in infuscatus but nearly as in the lineola section, widest 

 before the middle 4 



4 Pronotum deep black from apex to base, the side margins in lateral 

 sixth or seventh abruptly very pale testaceous. Body rather 

 narrowly oblong-suboval, moderately convex, strongly shining, deep 

 black, the sides of the prothorax sharply, and the apex and about 

 outer half of the elytra, pale testaceous; under surface black, the 

 hypomera, epipleura, apex of the abdomen and the legs pale testa- 

 ceous; head very large, nearly five-sixths as wide as the prothorax, 

 the eyes large and very prominent; epistoma, labrum and mandibles 

 rufous, the last black at tip; antennae not very stout, extending rather 

 behind the thoracic base, fusco-testaceous, paler basally; prothorax 

 about a third wider than long, the sides rounded, becoming oblique 

 and straight posteriorly, the basal angles obtuse but only very slightly 

 rounded, very distinct; base arcuate laterally, not quite as wide as 

 the sinuato-truncate apex; surface moderately finely reflexed at the 

 sides, with very fine stria, the anterior and posterior transverse 

 impressions distinct, the base rather strongly, sparsely punctured from 

 near the middle almost to the sides, the fovese rather narrow but very 

 feeble; elytra one-half longer than wide, a fourth wider than the 

 prothorax, parallel, obtusely ogival in apical third, the sinus ves- 

 tigial; striae moderately fine, impressed, the scutellar very short; 

 intervals distinctly convex, the discal puncture near apical fourth; 

 hind tarsi with the first joint much longer than the second but shorter 

 than the fifth. Length (cf) 4.8 mm.; width 1.8 mm. Iowa (Keo- 



kuk) idoneus n. sp. 



Pronotum pale, with a short vittiform median dark spot or with a larger 

 central transverse dark area, which in less developed form becomes 



