AMERICAN COLEOPTERA. 157 



not densely punctured behind, with a broad, smooth dorsal line; elytra with 

 rows of moderately fine close set punctures, here and there somewhat irregular, 

 intervals broad flat, the alternate ones with a few distant punctures; tip ob- 

 liquely declivous, broadly and deeply sulcata along the suture, and with a few 

 erect hairs. Long. 2 mm. 



Two specimens, Cabo de los Reyes, California, Mr. George Davidson. 

 Eelated to C. jmllus, but with the elytra punctured as in C. nitidu- 

 Iiis, from which it differs chiefly by the form of the thorax, which 

 is more parallel on the sides, and not at all constricted, but regularly 

 rouuded near the tip. 



21. C. mtiiulvLS.^ Bostrichus nitid. Mannh. Bull. Mosc. 1843,298; ]84fi, 359. 

 Sitka. This species resembles C. pullus Zimm., but differs by the 



punctures of the rows of the elytra being much finer and more closely 

 placed, and the intervals therefore wider and more even ; the protho- 

 rax is also distinctly rounded on the sides, and slightly constricted 

 near the tips. 



22. C. puberulus.— Cylindrical, moderately slender, black, thinly clothed 

 with short erect gray hairs; head slightly convex, punctulate ; prothorax a 

 little longer than wide, slightly narrowed in front, feebly rounded o)i the sides, 

 broadly rounded at base, and more strongly at tip, disc rough, with reclinate 

 tubercles in front of the middle, strongly but finely punctured at the sides and 

 behind; elytra about one-half longer than the prothorax, strongly but finely 

 punctured, but not in rows, posterior declivity not at all flattened, slightly con- 

 vex, with a well marked sutural stria extending from the tip one-third the 

 length of the elytra, tip of suture slightly acute, (but not acuminate, as in 

 Micracis.) Long, less thau 1'5 mm. 



One specimen from District of Columbia given me by Mr. Ulke. 

 This is among our smallest species, and somewhat resembles C. mimt- 

 tissimus Zimm. in form, but is smaller and much less finely punctured, 

 and is narrower. It is easily distinguished by the absence of the 

 fringe of long hairs on the head, and by the well marked, though nar- 

 row sutural stria extending from behind the middle to the tip of the 

 elytra; the acuteness of the sutural angle induces me to believe that 

 this is perhaps Tomicus pusilhis, Fitch, Noxious Ins. New York, ii, 

 No. 245. 



The funiculus of the antennae in this species is 5-jointed, the outer 

 joints 2 — 5 being closely connected, forming a pedicel to the club, as in 

 the group Tri/pophloeus Fairmaire, DuVal, Col. f]urope, iv. pi 33, fig. 

 IGO ; in the proportions of the body and in sculpture our species 

 also resembles the figure cited. A similar structure of the funiculus 

 is seen in C. nitidulus, atrafuhis, jfuf/us and palican'us. C. comnfus, 

 so anomalous by the two tufts of hair on the prothorax, seems to be- 

 long rather to the typical Crj/jdia/us ; at least, so far as the condition 



TRANS. AMEn. ENT. SOC. (21) SEPTEMBER, 1868. 



