368 MEMOIRS ON THE COLEOPTERA 



long as the body, blackish, feebly and just visibly pallescent distally, 

 where each joint has only its extreme tip a little more blackish. 

 Length (cf 9 ) 12.0-13.0 mm.; width 2.0 mm. New York (Bluff 

 Point, Lake Champlain) praelonga n. sp. 



7 Under surface, legs and antennae throughout deep black except in 

 the male of exilis, the elytral tips obliquely sinuato-truncate and 

 distinctly bidenticulate as a rule 8 



Under surface and legs, except the tarsi and tibial apices, pale rufo- 

 ferruginous, the elytral apices rounded, the sutural angle alone 

 minutely denticulate 15 



8 Elytra (cf 1 ) pale at base at each side of the scutellum, the pale tint 

 sometimes extending posteriorly along the median part of each in a 

 faintly pallescent nubilous vitta. Body very small and slender, black, 

 the antennae deep black, the pale prothorax narrow, cylindric, with 

 feebly arcuate sides, sometimes even a little longer than wide, the 

 black spots large, the entire base broadly black; elytra with rows of 

 coarse punctures but little confused apically, flattened above, feebly 

 inflated posteriorly, the fine cinereous hairs very inconspicuous, the 

 erect hairs short, blackish; lower margin toward base pale; entire 

 under surface, except the prosternum before the coxae, deep black, 

 feebly cinereo-pubescent, the abdomen distinctly but rather sparsely 

 punctate laterally; legs short, entirely blackish-piceous in two 

 examples, the anterior wholly pale, the second and third pairs 

 blackish, with the femora at base and apex and the tibiae basally 

 pale, in the third example. Female much larger and stouter than 

 the male, with the punctures everywhere more crowded, the colora- 

 tion more intense black above and beneath, the legs deep black and 

 the prosternum wholly pale anteriorly. Length (cf 9 ) 8.3-10.8 mm.; 

 width 1.4-2.0 mm. Pennsylvania (Harrisburg, Highspire and Heck- 

 ton Mills), W. S. Fisher exilis n. sp. 



Elytra deep black throughout, never pale at base 9 



9 Pronotum as in exilis, with a parallel-sided transverse black fascia 

 at base, often abruptly interrupted at the sides; antennae feebly- 

 thickened distally when compared with the basal part of the third 

 joint 10 



Pronotum with a longitudinally shorter basal fascia, frequently not 

 attaining the sides and with its anterior margin not transverse but 

 very broadly angulate; antennae strictly filiform 12 



Pronotum with a rounded basal black spot adjoining the scutellum; 

 antennae filiform 13 



10 Head deep black. Body small and shining, strongly, clearly, deeply 

 and moderately closely punctate; antennae evidently shorter than 

 the body; prothorax nearly as long as wide, coarsely, rather closely 

 punctate; elytra distinctly inflated posteriorly and with the oblique 

 apical truncature unusually and rather deeply sinuate, having series 

 of close-set deep coarse quadrate punctures, the ashy hairs sparse 

 and inconspicuous, the erect hairs numerous, blackish; strong punc- 

 tures of the abdomen wholly lateral and beginning rather abruptly; 

 legs piceous to black. Length (cf) 8.3 mm.; width 1.5 mm. 

 District of Columbia. delicatula n. sp. 



