June, 1898.] Casey : North American Coleoptera. G7 



In Tetraprlocera and Patea the antennas are njointed. In all the 

 others they are 10-jointed, except in Xylopertha and in one species of 

 Bostrichus, where they have but nine joints. Tetrapriocera longicornis 

 (== schwarzi Horn) is the only known species of that genus. Xyloper- 

 tha is confined, as might be expected, to the subsiberian fauna of the 

 Pacific coast, where it is represented by bidentata, declivis and suturalis, 

 hitherto placed in Sinoxylon, which genus has the two basal joints of the 

 antennal club short and transverse. Xylobiops is proposed for the Sinoxy- 

 lon basil/are, texanum, sextuberculatum and floridanum of the present 

 lists. Dinapate wrighti, the type and only known species of the genus, 

 is the largest bostrichid known ; it will probably soon become extinct 

 by reason of the destruction of its food- plant for commercial purposes. 



Dendrobiella, gen. nov. 



This genus inhabits the warmer parts of the North American con- 

 tinent and also the West Indies; the species known to me may be iden- 

 tified by the following characters: — 



Elytral punctures distinct throughout the disk, except at the side?, where they are obso- 

 lete, finer toward base, coarser posteriorly to the brink of the declivity, the latter 

 smooth and impunctured as usual throughout the genus. 



Larger species, 5.5-6 mm. in length, blackish in color sericans Lee. 



Smaller species, 4 mm. in length, rufo-piceous in color quadrispinosa Lee. 



Elytral punctures rather fine and sparse but distinct toward base, becoming wholly 

 obsolete toward the declivity. Male. — Head well developed, the surface flat- 

 tened, polished, nude and finely, sparsely punctulate, bituberculose at the base of 

 the vertex; eyes moderate, very prominent ; antennae pale, longer than the width 

 of the head, the first seven joints together scarcely longer than the first joint of 

 the club, the tenth joint long and narrow. Prothorax wider than long, slightly 

 narrowed anteriorly, broadly truncate at apex, the sides becoming parallel be- 

 hind the middle ; apical asperities moderately coarse and obtuse at the sides; disk 

 polished, finely, subimbricately punctulate toward the middle in more than basal 

 half. Elytra shining, the pubescence rather long, fine, decumbent, fulvous and 

 conspicuous; apical truncature flat and shining, the tubercles moderate, the lower 

 more obtuse. Female. — Smaller than the male but nearly similar, except that 

 the head is smaller, more convex, less shining, feebly convex, punctured, pubes- 

 cent and devoid of tubercles. Length 4.3-50 mm.; width 1.75-2 1 mm. 

 Texas ( Brownsville) pubescens, sp. nov. 



Elytral punctures wholly obsolete, being feebly traceable only very near the base. 

 Male. — Head moderate, flattened, becoming concave behind the frontal margin, 

 minutely, sparingly puberulent, slightly shining, finely and rather closely punctu- 

 late throughout; two small tubercles of the vertex on a transverse line through the 

 posterior limits of the eyes ; antenna; but little longer than the width of the head, 

 nearly as in pubeseens. Prothorax much wider than long, feebly narrowed in 



