478 Memoirs on the Coleoptera 



dense pronotal areas, dense on the strial intervals, narrowly on the 

 outer intervals as well as the first and fourth; beneath they are 

 distinct but widely separated, dense on anterior two-thirds of the 

 met-episterna, evident on most of the pro- and mesopleura; beak 

 strongly, evenly arcuate, moderately slender, black, feebly punctu- 

 late and not longer than the prothorax, the antennae barely beyond 

 the middle; prothorax a third wider than long, subinflated before 

 the middle, the sides parallel and moderately arcuate, oblique an- 

 teriorly to the unconstricted apex, which is slightly more than hS.lf 

 as wide as the base; punctures moderate and dense, the smooth 

 line narrow and incomplete; elytra but little more than a fourth 

 longer than wide, slightly wider than the prothorax and three-fifths 

 longer, the grooves not so coarse as in the two preceding. Length 

 (9) 3.3 mm.; width 1.28 mm. Virginia (Fort Monroe). 



virginica n. sp. 



These species adhere closely to a common type but I believe them 

 to be distinct as described. Individually, they seem to be rare. 



Sibariops n. gen. 



The species of this genus, the type of which is Centrinus confinis 

 Lee, are very numerous, but only a few of them have been described. 

 The general structure is not very unlike Dirabius, but the body is 

 smaller, frequently minute, the outline sometimes more abbreviated 

 anid the surface more or less convex. On segregating the species, a 

 marked peculiarity of habitus is seen to pervade the genus, and it 

 diflers from any of the preceding members of the Limnobaris series 

 in having a slender, subporrect spine before each anterior coxa and a 

 deep prosternal pit between the spines ; these however often become 

 obsolete, in which case the deep rounded pit also disappears. The 

 second funicular joint is elongate, though much smaller than the 

 first, and the club is more or less narrowly oval, with large pubescent 

 basal joint. 



In drawing up the following table the specific descriptions can 

 be curtailed by not repeating characters that are virtually uniform 

 throughout. The vestiture is always sparse, consisting of fine 

 and more or less inconspicuous squamules, usually uniseriate on 

 the strial intervals, and but seldom much more conspicuous and 

 never squamiform on the under surface; the color of the body and 

 legs may be known to be black, except where the coloration is 

 specially stated : 



Pronotal punctures never very coarse but deep and notably close-set, 

 sometimes dense 2 



