364 MEMOIRS ON THE COLEOPTERA 



Ferestria Leng 



The very small species separated under this name by Mr. Leng 

 (Bull. Am. Mus., XXXIV, p. 576) were placed at first in Broscus 

 and later in Evarthrus by LeConte. They present a singularly 

 distinct appearance, due to their small size, Anaferonia-like habitus 

 and largely effaced elytral striae. The single thoracic foveae are 

 shorter and relatively more deeply excavated than in any other 

 genus, and the posterior thoracic angles are very obtuse and rounded, 

 though in some species there is a minute acute prominence at the 

 position of the posterior marginal puncture. In obsoleta Say, the 

 position of this puncture is discordant, it being at a considerable 

 distance in front of the hind angles. In morio Dej., the almost 

 universal lateral reflexed margin of the prothorax is completely 

 obsolete behind about the middle and, anteriorly, is very fine and 

 barely observable. The following species is hitherto undescribed: 



Ferestria nanula n. sp. Moderately ventricose, convex, polished, deep 

 black, the legs rufo-piceous; head more than two-thirds as wide as the 

 prothorax; eyes moderately prominent, the sulci very widely separated, 

 slightly converging; antennae rather short and thick, piceous; prothorax 

 nearly one-half wider than long, the sides finely but strongly, equally 

 margined throughout, parallel and feebly arcuate, very rapidly and arcu- 

 ately oblique posteriorly, the obtuse angles with a minute acute external 

 projection; base sinuate except laterally, slightly wider than the peduncle 

 of the hind body and but little more than half the maximum width; apex 

 only just visibly sinuate, the anterior incised discal line distinct and en- 

 tire; stria fine, even, not quite attaining the base; surface very smooth, 

 the transverse impressions scarcely traceable, the foveae small, slightly 

 oblique and very deep; posterior marginal puncture coarse, at the basal 

 angles; elytra oval, not quite one-half longer than wide, a fourth wider 

 than the prothorax; marginal stria forming the outer limit of the row of 

 relatively very coarse ocellate punctures; striae wholly obsolete, except- 

 ing vestiges of the first four or five, which are feebly and indefinitely 

 punctulate; dorsal puncture barely at all behind the middle; abdominal 

 sutures very coarse, ending at each side in a coarse sublateral fovea; 

 anterior tarsi scarcely more dilated in the male. Length (cf 9 ) 8.5-10.0 

 mm.; width 3.3-3.6 mm. Alabama (Mobile), Loding. 



The very slight differences in the anterior tarsi among the four 

 examples at hand, renders it somewhat doubtful if both sexes be 

 really included. The abdominal surface is very smooth through- 

 out in this genus, but the sutures are unusually coarse. 



