THE LAMELLICORN BEETLES. 



925 



1743 (5486). At^enius imbricatus Melsh., Proc. Phil. Acad. Nat Sci., II, 



1844, 136. 



Oblong-oval, moderately convex. Piceous, opaque, the surface usually 

 covered with a brownish-gray coating; legs brownish, antenna? and palpi 

 paler. Clypeus broadly but feebly emarginate, its sides broadly curved, 

 nearly smooth at middle; vertex densely punctate. Thorax nearly twice 

 as wide as long, slightly narrower behind ; sides in front curved, hind angles 

 very obtuse, base broadly curved; surface with rather coarse and closely 

 placed punctures, which are but faintly visible on account of coating. Ely- 

 tra as wide at base as thorax, humeri acutely dentate; striae rather deep, 

 with coarse, not closely placed indistinct punctures; intervals flat, each 

 with a single row of fine punctures bearing a small, scale-like yellowish 

 hair. Length 4-4.5 mm. 



Lake County; rare. May 25-July 12. Two specimens only 

 from beneath rubbish; one from the lake beach near Pine; the other 

 from Hessville by Wolcott. Occurs from Massachusetts to Texas. 



1744 (5487). AT^xirs alternatus Melsh.. loc. cit.. p. 137. 



Resembles imbricatus in form and color. Head densely punctured, the 

 punctures equal, at sides more rugose. . Thorax similar to that of imbri- 

 catus. the base undulate, not regularly curved. Elytra! striae fine, with 

 rather distant inconspicuous punctures, often hidden by the surface coat- 

 ing; intervals slightly convex, the alternate ones, 1-3-5-7. more acutely 

 elevated along the middle. Length 3.5-4.5 nun. 



Posey County; rare. June 5. Occurs from Pennsylvania to 



Texas. 



A. ouatulus Horn, piceous-black, legs and antenna? paler, length 

 3.5 mm., is known from Pennsylvania to Louisiana. 



1745 (5491). ATiENius gracilis Melsh., loc. cit., p. 137. 



Elongate, slender, parallel, subdepressed. Piceous black, moderately 

 shining ; legs brownish ; tarsi, palpi, antenna? and very narrow front mar- 

 gin of thorax, paler. Clypeus rather smooth in front; vertex rather closely 

 and coarsely punctate. Thorax one and a half times wider than long, hind 

 angles broadly rounded, base curved, its marginal line very distinct; disk 

 with a distinct impression near front angles and a feebler one at middle 

 of sides, surface rather coarsely and closely punctate. Elytra as wide as 

 thorax, stria? deep and broad, not distinctly punctured; intervals strongly 

 convex, almost like carina?, each with a row of slight elongate elevations 

 on the sides below the summit. Mesosternum opaque, coarsely punctured, 

 strongly carinate between the coxa?. Length 3-4 mm. 



Throughout the State; frequent. April 23-Oetober 10. A pret- 

 tily marked and very distinct little species, widely distributed over 

 the United States. 



A. strigatus Say, piceous-black, legs and antenna? paler, length 

 4.5-5 mm., is said to occur from the Middle States westward and 

 southward. 



