236 MEMOIRS ON THE COLEOPTERA 



squama. The hind tarsi are slender, the basal joint as long as the 

 next two and longer than the fifth. The abdomen is feebly punctu- 

 late at base, but bears no special sexual marks in the male. The 

 two known species are the following : 



Form oblong-suboval, rather feebly convex, polished throughout, deep 

 black, without metallic lustre of any kind, the edges of the pronotum 

 and elytra diaphanously paler; under surface piceous-black, the 

 legs testaceous; head smooth, the eyes only moderately prominent; 

 antennae extending fully to the thoracic base, pale testaceous in 

 color; prothorax not quite one-half wider than long, widest anteriorly, 

 where the sides are rather strongly rounded, thence feebly oblique 

 and nearly straight to the basal angles, which are rather obtuse but 

 sharply defined and even minutely subprominent; base transverse, 

 feebly arcuate laterally, strongly beaded and but slightly wider than 

 the apex, which is feebly sinuate, with broadly rounded angles; 

 surface even, smooth, finely and evenly reflexed at the sides, with a 

 rather distinct impressed subentire stria, the foveae small and linear, 

 rather shallow but distinct, barely at all punctulate; elytra oblong, 

 parallel, with feebly arcuate sides, not one-half longer than wide, 

 fully a fourth wider than the prothorax and rapidly obtusely ogival 

 at apex, with very feeble sinus: striae rather fine but well impiessed, 

 the scutellar long, subparallel, the discal puncture near two-thirds; 

 intervals feebly convex throughout the width; marginal series of 

 fovea? only imperfectly interrupted medially. Length (cf 9 ) 6.5- 

 7.0 mm.; width 2.6-3.0 mm. Long Island to Indiana. 



autumnalis Say 



Form more oblong and elongate, similar in coloration and lustre; head 

 and antennae nearly similar, the former rather more elongate, the 

 neck distinctly constricted- prothorax more quadrate, two-fifths 

 wider than long, widest only a little before the middle, the sides 

 more evenly and more feebly arcuate, otherwise nearly similar, 

 except that the foveae are larger, much deeper and with numerous 

 scattered distinct punctures; elytra similar throughout but longer, 

 one-half longer than wide and not quite a fourth wider than the 

 prothorax, the scutellar stria still longer and the lateral line of 

 foveae more completely interrupted medially; hind tarsi not quite so 

 slender but otherwise similar. Length (9)7-2 mm.; width 2.9 mm. 

 District of Columbia nitescens n. sp. 



In this genus the emargination of the mentum is notably deeper 

 than in the true Bradycellus, the tooth similarly strongly developed. 

 Nitescens is allied rather closely to autumnalis but, on inspection 

 with a series of the latter at hand, it is observed to be more elongate 

 and more parallel and somewhat larger in size; the prothorax is 

 more quadrate, much less transverse and is less inflated at the 

 sides anteriorly; I am under the impression that the type was 

 found near an electric light of the city in July some years ago. 



