128 MEMOIRS ON THE COLEOPTERA 



Head and sloping sides of the pronotum nearly flat, the latter more 

 shining though sometimes feebly reticulate; head always loosely and 

 inconspicuously punctate; elytral punctures regularly serial. Amer- 

 ica 2 



2 Elytra each with two approximate sublateral striae proceeding from a 

 shallow foveiform basal impression, the inner generally greatly 

 abbreviated, the sides gradually converging posteriorly as in tes- 

 taceus and similarly having the last ventral segment but slightly 

 longer than the others 3 



Elytra without sublateral striae or foveiform basal impression; size still 

 smaller as a rule, the elytra shorter, parallel, nearly straight at the 

 sides and more abruptly truncate at apex, the last ventral more 

 evidently longer than the preceding 5 



3 Posterior extension of the inner sublateral stria extremely feebly 

 marked; joints two to four of the male antennae subequal in length; 

 abdomen and under surface of the head rather alutaceous. Male 

 elongate, depressed, shining, pale testaceous in color throughout; 

 head subequal in width to the prothorax, finely, rather sparsely 

 punctate above, more strongly and less sparsely beneath; epistomal 

 suture broadly, posteriorly angulate; median stria not evident; eyes 

 well developed, basal and moderately prominent; antennae long and 

 strictly filiform distally, four-fifths to scarcely more than two-thirds 

 as long as the body, the basal joint twice as long as wide, narrowed 

 rapidly toward base and as long as the next two together, one to 

 three gradually less thick, five to ten subequal and very elongate, 

 the eleventh slightly longer; prothorax parallel, quadrate, barely 

 visibly wider than long, the sides very feebly arcuate, the apical 

 angles generally minutely denticulate but variably so; surface very 

 finely, sparsely punctate, rather more strongly and less sparsely 

 outside of the strong sublateral grooves, adjoining which, medially on 

 the inner side, there is usually a small impression; scutellum broadly 

 ogival, fully twice as wide as long, with very few fine punctures; 

 elytra nearly twice as long as wide, at base a little wider than the 

 prothorax, nearly two and one-half times as long, the sides feebly 

 arcuate and gradually converging posteriorly, except near the base, 

 the apex truncate but with the angles broadly rounded; surface flat 

 or feebly concave, polished and shining, prominent along the summit 

 of the flanks; subsutural stria extending forward to the middle; 

 punctures extremely small, feeble and scarcely observable; anterior 

 acetabula rather broadly inclosed. Female in outline, size and 

 general features as in the male, but with the antennae very much 

 shorter and with a loose 3-jointed club which is distinctly more than 

 half as long as the remainder, the entire antenna shorter than the 

 elytra; abdomen scarcely at all different. Length (cf 9 ) 1-65-1.75 

 mm.; width 0.55-0.63 mm. Illinois, Indiana, New York (Catskill 

 Mts.) and Pennsylvania (Philadelphia). [Lcem. testaccns Csy. nee 

 Fabr.j apertus n. sp. 



Posterior extension of the inner stria very obvious, it being generally 

 subentire 4 



4 Size larger than in apertus. Male rather more parallel, with similar 



