November, 1870.] 121 
Genus 2.—Crxivs, Lat. 
Head: crown widest behind, deeply concave, with a depressed middle 
keel; posterior margin concave, anterior margin convex ; forehead 
very small, almost in the same plane with the crown, generally 
composed of two triangular pieces, separated by a middle keel. 
Face much dilated, with three longitudinal keels. Clypeus large, 
separated from the face by an angular suture, and with a distinct 
middle keel. Ocelli 2, placed close to the margin of the face, 
between the eyes and antenne. 
Thorax: pronotum as in Oliarus. Scutellum with three longitudinal 
keels. 
Nerves of the elytra distinctly granulated with black; the granules 
along the anterior margin always largest. 
A. 
Elytra pale, transparent ; the base, a narrow band before the middle, 
frequently much interrupted, or sometimes nearly obliterated, and 
another broader one before the apex, brown...1. eunicularius, Fab, 
1.— Marginal nerve with two or three of the granules at irregular 
intervals, generally united. 
B. 
Elytra without a band before the apex, the first nerve at the base, as 
far as the bifurcation, brown or black, transverse nerves black, 
the space between them and the apex with several more or less 
distinct pale fuscous, or brownish patches .........2. nervosus, Lin. 
Head and face yellow, or pale brownish-yellow ; pronotwm pale chestnut- 
brown, darker on the sides. £lytra: marginal spots somewhat 
square. Genital organs pale brownish or yellowish... 
3. intermedius, Fieb. 
Elytra: marginal granules not square or elongate...4. brachycranus, Fieb. 
Head black, keels broadly pale brownish-yellow. ace brownish- 
yellow. Hlytra almost invariably with three short black streaks 
along the anterior margin, and a short transverse fuscous streak 
midway between the cuneate patch and the apex ... 
5. contaminatus, Lat. 
2.—Marginal nerve without united granules. 
C. 
Elytra without bands. 
