198 H. C. FALL. 



Middle coxae contiguous. The hind coxal plates are as in Euvril- 

 letta. In most other points of structure Xyletomerus is substantially 

 in agreement with Vrilletta and Euvrilletta. 



1. X. histricus n. sp. — Elongate, two and one-half times as long as wide, 

 parallel, moderately strongly convex, piceous brown, with fine fusco-cinereous 

 recumbent pubescence, antennae and legs rufous. Head finely not very closely 

 punctate, occiput feebly carinate ; eyes small, only moderately convex. First 

 joint of antennae (fig. 17) stouter as usual, second similar but smaller, third nar- 

 rower and somewhat elongate; fourth to eighth similar, small, a little prominent 

 interiorly; ninth triangular, about twice as long as wide, the outer angle a little 

 obtuse; tenth similar to the ninth; eleventh about one-half longer than the 

 ninth, oval. The club is evidently longer than the stem, the ninth joint equal 

 to the five preceding or nearly so. Prothorax just visibly wider than the elytra 

 at base, transverse, convex, moderately narrowed in front; side margin very 

 narrow and only just perceptibly wider at the hind angles which are broadly 

 rounded ; front angles nearly right and a little rounded at vertex; base feebly 

 impressed each side of the middle ; surface densely finely and punctate with scat- 

 tered slightly larger punctures. Elytra with scarcely impressed finely somewhat 

 distantly punctate striae, interspaces nearly flat, finely closely punctulate. Lower 

 surface finely closely punctate and finely pubescent. Length 2.9-3.2 mm. 



California, Sacramento County (Koebele) ; Los Gatos (Hubbard 

 and Schwarz). 



Three examples only have been seen, one from the former and 

 two from the latter locality. In one of them the joints of the an- 

 tennal club are slightly more elongate ; this is probably a male. 



XYLETISIUS Latreille. 

 Form more or less elongate, varying from oval to oblong; men- 

 turn trapezoidal, more or less arcuate in front; terminal joints of 

 palpi compressed, elongate, feebly dilated apically, outer edge oblique, 

 inner angle rounded : more broadly triangular in harrisii, entirely 

 anomalous in gracilipes. Antennae serrate or subpectinate, the outer 

 joints scarcely or only slightly more elongate. Eyes variable in 

 size, not emarginate. Front acutely margined laterally, epistomal 

 suture arcuate, scarcely impressed. Prothorax transverse, hind 

 angles broadly rounded and undefined, front angles nearly right 

 and narrowly or scarcely rounded. Elytra striate. Prosternum 

 deeply excavated for the head, the latter merely slightly impressed 

 beneath ; front coxae contiguous; mesosternum horizontal and chan- 

 neled at middle in front, becoming strongly ascending between the 

 middle coxae, which are separated by fully half their own width. 

 Metasternum finely sulcate at middle, at least posteriorly; gradually 



