72 J. L. LECONTE, M. D. 



XYL.I-:ilOKlIK Eichhoff. 



X. viciims. — Cylindrical, i)l!iek or brown, antennre and feet dark ferru- 

 ginous,; prothorax longer tiian wide, broadly rounded on the sides, gradually 

 narrowed in front and roumled at tip, puncture<l behind, granulate and hairy 

 in front; elytra with distinct rows of punctures, interspaces flat with single 

 rows of more distant punctures, sparsely clothed with long erect hair; pos- 

 terior declivity concave, edge of concavity with several small denticles and 

 two large ones. Length .10 inch ; 2.5 mm. 



Hritisli Columbia; Mr. Crotch. Allied to X. caelatus Eichh., but 

 the elytral punctures are smaller and more distant, and the inter- 

 spaces wider and flat. The denticles of the posterior declivity are 

 similarly arranujed and the two lar<rest are rather within than upon 

 the margin of the declivity. The tibiie are coarsely and irregularly 

 serrate as in ciu/ikuk. 



X. lianiatus. — Black, rallior robust, with a few erect hairs ; prothorax 

 scarcely longer than wide, nearly square, with the apex rounded as usual, disc 

 punctured behind, with a narrow smooth dorsal space, punctures before the 

 middle rougiily and acutely granulate; elytra with rows of distant punctures, 

 sutural groove deep, broader behind, and expanded into the very deep pos- 

 terior excavation, which is smooth and sharply margined ; near the upper 

 part of the declivity on each side is a long spine bent downwards at the end. 

 and near the tip is a small acute tooth. Length .12 — .16 inch ; 3 — 4 mm. 



Mojave Desert, California; Mr. Crotch. J observe no sexual dif- 

 ferences in the individuals before me. This species resembles X. pla- 

 giatna Lee, S in the singular armature of the elytra, but is much 

 larger and otherwise (|uite different. 



Several species of Xyleborus are in Mr. Crotch's collection, but 

 are too closely allied to those already described to be properly 

 mentioned on the present occasion. 



T09IICVS Latr. 

 T. latitlens. — Cylindrical, brown, shining, clothed with long erect yellow 

 hairs, prothorax more parallel on the sides than usual, not much longer than 

 wide, more broadly rounded in front, hind angles rounded; disc sculptured as 

 in T.pini,\noT& strongly impressed each side near the middle; elytral strise 

 deep, closely punctured, interspaces each with a row of punctures; posterior 

 declivity concave as usual, subsutural denticle small acute, next tooth broad, 

 composed of the confluence of three cusps, of which the upper one is least de- 

 veloped and the middle one most prominent; following this is a long acute 

 tooth, and then the usual apical acute margin. Length .12 inch, 3 mm. 



California; Mr. Crotch. Smaller than T. pini, with a shorter pro- 

 thorax and very different elytral sculpture and armature. 



