228 MEMOIRS ON THE COLEOPTERA 



interval in my example of placidus. The abdomen has a suffused 

 and stronger micropubiferous punctulation and in the male there 

 is a small elongate-oval, densely pubescent spot, on the median line 

 near the centre of the combined basal segments, which seems to be 

 rather constant and is perhaps homologous with the small pubescent 

 spots occurring in certain species of Selenophonts, although they 

 are there very different in number and in disposition. The species 

 may be known as follows: 



Punctulation and fine pubescence confined to the marginal parts of the 

 elytra 2 



Punctulation and pubescence extending over a large part of the elytral 

 surface 4 



2 Elytral striae strongly impressed, the intervals rather strongly convex 

 suturally. Body rather strongly convex, very shining throughout, 

 the head and prothorax blackish-piceous, the latter nubilously paler 

 apically and basally, the elytra testaceous, each with an elongate 

 black spot near the suture behind the middle; legs testaceous; head 

 convex, more than three-fourths as wide as the prothorax, with 

 prominent eyes; antenna? rather long and slender, brown, the basal 

 joint paler; prothorax not quite one-half wider than long, the sides 

 oblique behind, the angles very obtuse but not evidently rounded; 

 surface punctured latero-basally, the foveae small though rather 

 deep; median line strong, entire, the anterior transverse impression 

 distinct; elytra nearly one-half longer than wide, behind the middle 

 one-half wider than the prothorax, obtusely rounded behind and not 

 sinuate; surface wholly impunctulate, except excessively minutely 

 in the marginal interval and more broadly at apex. Length (9) 

 4.0 mm.; width 1.8 mm. Europe *placidus Gyll. 



Elytral striae much feebler, the intervals flat or nearly so, feebly convex 

 suturally ; body slightly less convex 3 



3 Color deep black throughout, the very fine thoracic edge and the 

 elytral suture rufescent, the under surface deep black; legs throughout 

 piceous-black; surface highly polished; head nearly smooth, smaller 

 than in placidus, though nearly three-fourths as wide as the pro- 

 thorax, the eyes rather prominent; antennae extending to basal 

 fourth of the elytra, slender, black, the basal joint obscure rufous; 

 prothorax two-fifths wider than long, the sides rounded anteriorly, 

 oblique and straight basally, the base as wide as the feebly sinuate 

 apex, transverse medially, anteriorly oblique at the sides, the angles 

 extremely obtuse but distinct, not rounded; surface smooth though 

 with sparse punctures, very fine apically, stronger basally, the foveae 

 elongate, linear, not very deep, the anterior impression and stria as 

 in placidus; elytra fully one-half longer than wide, much wider behind 

 the middle than at base and one-half wider than the prothorax, 

 obtusely rounded at apex, the sides broadly arcuate; sinus obsolete; 

 surface very smooth, extremely minutely, sparsely punctulate only 

 in the marginal interval and more broadly apically, the dorsal 



