AMERICAN COLEOPTERA. 191 



entirely different. This genus does not fit very well in a linear 

 arrangement, and is placed after Trypopitys rather from the conven- 

 ience of tabulating it in this position, than from a conviction of the 

 propriety of so doing. 



1. C. tenuilineaf us Horn. — Elongate, parallel, brown, sparsely pubes- 

 cent. Head dull and minutely but not densely granulose; eyes moderate. An- 

 tennae serrate; first joint arcuate, elongate; second globose; tbird triangular, 

 about as wide as long; fourth to sixth transversely triangular, the outer angle 

 acute; following joiuts gradually narrower and more elongate. Prothorax as 

 wide as the elytra, sides rather widely margined, moderately convergent in front, 

 hind angles obtuse and somewhat rounded, front angles right ; disk elevated at 

 middle posteriorly, the median line sulcate from the summit of the elevation to 

 the front margin ; an oblique impression each side extending from the middle to 

 the base; surface sparsely granulate laterally, more densely along the median 

 furrow. Elytra irregularly moderately closely punctate and with fine prostrate 

 pubescence, which becomes condensed along the suture and in four fine equidist- 

 ant lines on each elytron, the three inner ones uniting before-the apex ; there is 

 also a short oblique scutellar line. Beneath finely pubescent, the metasternum 

 minutely granulose, the ventral segments finely closely punctate. Length 3.3- 

 5.4 mm. 



Three specimens of this rare species are before me, bearing labels, 

 Los Angeles County, California (Van Dyke) ; Los Gatos, Califor- 

 nia (Hubbard and Schwarz) ; and Santa Catalina Island, Califor- 

 nia, collected by myself. The type was described from Oregon. 



Xyletinini. 



The genera of this group are of elongate oval form as a rule, and 

 have the contractile power fairly well developed. The prothorax is 

 excavated beneath for the head, which is strongly deflexed in repose, 

 the mandibles reaching the metasternum ; the under surface of the 

 head more or less impressed or deeply excavated, the antennas curv 

 iug into these cavities and resting against the contiguous front 

 coxae. The antennae are variable in form, 11 jointed in our genera. 

 The metasternum is not lobed in front; the trunk is not grooved for 

 the reception of the middle and hind legs. 



Our genera are six in number and separate as below : 



Head merely broadly impressed beneath in front, not distinctly excavated for 

 reception of the antenna;; metasternum not declivous anteriorly. 

 Three outer joints of antennse elongate. 



Antenual funicle strongly acutely serrate or even subpectinate, the outer 

 joiuts not or but slightly narrower than the club, at least in the male; 

 middle coxse distinctly separated Vrilletta. 



TRANS. AM. ENT. SOC. XXXI. JUNE, 1905. 



