Coleopterological Notices, III. 43 



toward apex, sometimes with traces of two narrow impunctate lines toward 

 "base. Under surface very finely and densely punctate, more conspicuously 

 pubescent. Length 9.0-10.5 ; width 2.5-3.0 mm. 



New Mexico. 



The two specimens are males, and are from the Levette cabinet. 

 The species is allied to sanguinea, but differs' greatly in coloration 

 and punctuation, and in the more narrowly and obliquely truncate 

 elytral apices. The red humeral maculation is similar in form to 

 that of Acmseops basalis. 



L,. lacustris n. sp. — Body, legs and antennae entirely black, the elytra 

 pale brownish-testaceous, sometimes feebly infuscate near the apex ; lustre 

 moderately shining ; pubescence moderately long, very short on the elytra. 



Male. — Slender, very convex. Head wider than long, the sides behind the 

 eyes parallel for a short distance ; hind angles right and narrowly rounded ; 

 surface feebly convex, densely and rather coarsely punctate; antennas three- 

 fourths as long as the body, rather stout. Prothorax as in sanguinea, rather 

 coarsely, deeply, very densely punctate, with a narrow impunctate median 

 line, the punctures nearly but not quite in mutual contact, the interspaces 

 polished. Elytra two and one-half times as long as wide, at base one-third 

 wider than the prothorax ; sides gradually and distinctly convergent from 

 base to apex, the latter very narrowly and obliquely truncate, the truncation 

 deeply sinuate ; disk rather densely and strongly punctate, the punctures be- 

 coming slightly finer toward apex. Length 9.0-11.0 mm. ; width 2.8-3.6 mm. 



Female. — Moderately slender, smaller than the male, the upper surface much 

 less convex. Head similar in form to that of the male, but with the surface 

 very finely and excessively densely punctate and dull ; antennae scarcely more 

 than one-half as long as the body, very slender. Prothorax similar in form to 

 that of the male, but with the surface extremely densely punctate, and with- 

 out trace of median impunctate line, the punctures scarcely smaller than in 

 the male and very much larger than those of the head. Elytra scarcely more 

 than twice as long as wide, at base rather more than one-third wider than the 

 prothorax, the humeri distinctly rounded but much more prominent than in 

 the male ; sides almost parallel, feebly convergent toward apex, the apical 

 truncation as in tbe male ; disk very coarsely, deeply, densely punctate, the 

 punctures becoming much finer toward apex, coarser toward base than those 

 of the male. Length 7.8-9.0 mm. ; width 2.5-3.0 mm. 



Michigan (Marquette). Mr. Schwarz. 



This species is allied to sanguinea Lee, but differs in the much 

 stouter male antennae and in the radically different truncation of the 

 elytral apices; the latter in sanguinea is rather broad, scarcely at 

 all oblique, and is almost perfectly straight, the angles being blunt ; 

 in lacustris it is very much narrower, oblique, deeply sinuate and 

 with the angles, especially the exterior, very acute and prominent,. 



