364. Coleopterological Notices, V. 



ciably separated. This species seems to be somewhat intermediate 

 between Leptusa and Silasa. 



The two following species are similar in structure throughout 

 and possibly belong to Leptusa, but differ considerably in facies 

 from brevicoUis, because of the much longer prothorax and the 

 densely opaque and lustreless anterior parts of the body ; they 

 may be defined as follows : — 



Stouter, the anterior parts of the body velvety blue-hlack and perfectly 

 opaque ; fourth and fifth ventral segments exactly equal in length. 



opaca 



Much more slender, the head and pronotum opaque, brown, the elytra rather 

 more shining ; fifth ventral a little longer than the fourth. ..seminitens 



In opaca the conformation of the parts about the middle coxae is 

 exactly as in brevicoUis, but the mesosternal process extends as 

 far behind as the apex of the metasternal ; it is however free and 

 not continuous on the same level. 



L(. opaca n. sp. — Stout, blackish, opaque, the abdomen shining, rufo- 

 testaceous, the last two segments black ; legs pale, the posterior femora clouded 

 with piceous toward apex ; anteunse blackish, pale toward base and with the 

 eleventh joint abruptly pale flavate ; head aud pronotum completely lustreless, 

 not punctate, minutely and extremely densely granulato-reticulate through- 

 out ; elytra sericeous, indistinctly punctate ; abdomen rather strongly, not 

 very densely punctate, sparsely so toward apex ; anterior parts finely, very 

 indistinctly pubescent, the abdomen more sparsely but distinctly so. Head 

 more than three-fourths as wide as the prothorax, the eyes rather prominent, 

 at less than their length from the base ; antennse about as long as the pro- 

 thorax and elytra, strongly, gradually increasing in width, the outer joints 

 strongly transverse, eleventh longer than the two preceding. Prothorax two- 

 fifths wider than long, widest at anterior third where the sides are strongly 

 rounded and prominent, thence strongly convergent and distinctly sinuate to 

 the base, which is transversely arcuate and equal in width to the apex ; basal 

 angles obtuse but scarcely at all blunt ; disk convex, even, not impressed. 

 Elytra slightly wider than the prothorax and about one-third longer, parallel, 

 the sides nearly straight; humeri slightly exposed at base. Abdomen a little 

 longer than the anterior parts, about as wide as the prothorax ; sides parallel, 

 scarcely visibly arcuate ; border thick. Length 2.0 mrn. ; width 0.6 mm. 



Pennsylvania. 



The four specimens in my cabinet do not indicate any variation. 



Li, seminitens n. sp. — Slender, parallel, dark red-brown, the abdomen 

 bright rufo-testaceous, with a subapical black cloud ; legs pale ; antennse 

 blackish, paler toward base, the eleventh joint abruptly pale ; head and pro- 

 notum opaque, feebly pubescent, impunctate and minutely, very densely gran- 



