June, 1898 ] 
Casey : North American Coleoptera. 
65 
Basal joint but slightly shorter than the entire remainder, the second joint relatively 
much shorter; pronotum not impressed sublaterally at base. 2 
2 — Pleural sulcus below the humeri deep and strongly marked; elytra twice as long 
as wide; eyes separated by evidently more than three times their own width. 
Body rather stout, the elytra subdilated near the tip, blackish-piceous above, 
the legs and antennas dark rufous or rufo-piceous; surface feebly shining, the 
pubescence extremely short, pale, dense and conspicuous on the elytra. Head 
short, inserted to the eyes, dull, the epistomal impression well marked. Pro¬ 
thorax three-fifths wider than long, rounded at apex, the sides thence strongly di¬ 
verging and feebly sinuate, becoming parallel and broadly rounded in basal half; 
basal angles rounded. Elytra twice as long as wide, more than three times 
as long as the prothorax and fully as wide, a little wider at apical third ; humeral 
angles rounded. Length 3.7-4.5 mm.; width 1.3-1-7 mm. California (Sta. 
CruzMts ) .pleuralis, sp. nov. 
Pleural sulcus narrow and feeble. 
3— Elytra fully twice as long as wide; eyes small, separated by fully four times their 
own width. Body very slender, nearly as in pleuralis but narrower, the elytra 
not distinctly wider behind and fully three and one-halftimes as long as the pro¬ 
thorax, the latter nearly similar in outline but still more transverse, the sides be¬ 
coming parallel in less than basal half, with the median line similarly finely im¬ 
pressed anteiiorly. Length 2.9 mm.; width 1.0 mm. California (locality not 
indicated). macer, sp. nov. 
Elytra much shorter, three-fourths longer than wide; eyes more convex and better 
developed, separated by three times their own width. Body suboblong, moder- 
ately convex, dull, blackish, almost similar throughout to pleuralis but shorter, 
the prothorax relatively rather smaller and the elytra much shorter, not distinctly 
dilated subapically, and with the minute subgranuliform rugulosity still finer 
and the pubescence a little denser, the fine striae distinct to the summit of the 
convex declivity. The hind tarsi are longer than in pleuralis. Length 3,4 
mm.; width 1.25 mm. California (locality not indicated). .saginatus, sp. nov. 
The descriptions are derived throughout from the female, the only 
male accessible to me being one of the four examples of pleuralis. This 
male is very much smaller and narrower than the female, with the eyes 
better developed and separated by slightly more than twice their own 
width ; the prothorax is more transverse and almost semicircular in 
outline from the base around the apex, near which it is perhaps more 
correctly broadly parabolic; the last ventral segment is simple, rounded 
ta apex and not quite as long as the two preceding combined; the an¬ 
tennae do not differ essentially in structure from those of the female, but 
are rather more slender. 
Bostrichini. 
The genera of Bostrichini have not been considered in their mutual 
'dationships for twenty years, when a review of them was published by 
Dr. Horn. I find it necessary to increase the genera recognized by 
