542 SUBFAMILY XII. COSSONIN^E. 



Occurs abundantly on dead twigs in Florida; also in the Dis- 

 trict of Columbia in dead branches of grape vine. (Ulke.) Re- 

 corded also, perhaps erroneously, from Ohio. Readily distin- 

 guishable from the other species by the much broader elytral in- 

 tervals and the well marked frontal fovea. (Casey.) Placed in 

 Aunntrorliinus by Horn, erroneously according to Casey. 



849 (11,229). PENTARTHRINUS PARVICOLLIS Casey, 1892, 699. 



Rather short and robust, feebly wedge-shaped, convex. Black or pic- 

 eous, polished, legs and antenna? reddish-brown. Beak very short, one- 

 third as long as thorax, rather coarsely, deeply and closely punctate. 

 Thorax small, oval, strongly convex, as long as wide, sides evenly and strong- 

 ly curved, disc punctate as in key, more closely and coarsely than in nit ens. 

 Elytra two-thirds wider than thorax, slightly wider behind the middle than 

 at base; stria? feebly impressed, very coarsely and closely punctate; inter- 

 vals as in key. Length 2.1 2.5 mm. 



Pennsylvania, Virginia, New Jersey, in dead wood of various 

 trees. (Cliittcndcn.) Reared from apple wood, May 2 29, at 

 Flatbush, N. Y. (Zabriskic.) Easily distinguished by its rather 

 shorter, broader elytra, small oval thorax and very coarse punc- 

 tuation. 



850 (11,230). PENTARTI-IRINUS PICEUS Casey, 1892, 700. 



Cylindro-cuneate, strongly convex. Piceous, the elytra polished. Beak 

 nearly half as long as thorax, finely and sparsely punctate, its transverse 

 impression with a small, feebly impressed frontal fovea. Thorax as wide 

 as long, sides broadly curved, converging and feebly sinuate toward apex, 

 punctate as in key. Elytra distinctly wider than thorax; stria? deeply im- 

 pressed, rather coarsely not closely punctate. Length 2.6 mm. 



Marion Co., Ind., rare; Nov. 28. Recorded from Ohio. De- 

 scribed from Florida. ''This species may be known by its fine 

 punctuation and piceous-brown color.'' (Casey.} 



851 (11,231). PENTARTHRINUS ATROLUCENS Casey, 1892, 700. 



Narrow, feebly wedge-shaped, strongly convex. Dark reddish-brown to 

 black, shining, and glabrous throughout, antenna? and legs paler. Head and 

 basal half of beak finely and very sparsely punctate; beak two-fifths as long 

 as thorax, its apical half more closely punctate. Thorax as long as wide, 

 sides broadly rounded from base to apical third, then converging and con- 

 stricted to apex; disc convex, coarsely, deeply, not densely punctate, the 

 apical margin smooth, rufescent. Elytra nearly one-third wider than 

 thorax; stria? coarse, feebly impressed, their punctures coarse, round, not 

 very close-set; intervals nearly flat, slightly wider than strial punctures, 

 very finely punctate. Length 2.3 2.6 mm. 



