426 RHYNCHOPHORA. 
2. Elytra without scale-like pubescence, glabrous 
or with outstanding hairs; club of antenna 
orbicular and compressed. 
A. Base of thorax finely bordered ; prosternum 
with a short process ; size very small; club 
of antenne divided by three constricting 
sutures into four joints. . .'. . . 
B. Base of thorax not bordered. 
a. Club of the antennz with the second joint 
crescent-shaped and completely embracing 
the sides of the first joint which is oval ; 
scutellum rudimentary; elytra with re- 
flexed portion dentate in the male, not 
dentate in the female Sp Reo 
b. Club of antenne with the second joint 
variable in shape but not embracing the 
sides of the first joint; scutellum distinct. 
a*, Prosternum with a sharp and distinct 
angular process between the anterior 
coxee. 
at. Elytra not excavate at apex which 
is applied to the abdomen. 
at. Club of antennz simple, orbicular, 
with curved sutures, concave towards 
apex; mentum oblong-quadrate, 
sub-mentum invisible . clad = 
bt Club of antenne truncate at apex, 
the basal joint being corneous and 
the remaining oints lying within 
it; mentum broadly cordate, sub- 
mentum large and concave anteriorly 
bt. Elytra excavate at apex which is 
horizontal or almost horizontal behind 
the apex of abdomen . . . .. . 
b*. Prosternum without or with a very 
short process between the anterior 
Coxe, 
af. Tibize almost linear without furrows 
for the reception of the tarsi; apex of 
elytra with large teeth in the male, 
and with a strong impression on each 
side of suture in the female . ic 
by. Tibie dilated, furnished with fur- 
rows for the reception of the tarsi; 
apex of elytra without large teeth or 
deep impressions in the sexes 
[ Dryocutina, 
PiryorpHtHoRUS, Hich. 
XYLOCLEPTES, Ferr, 
TAPHRORYCHUS, Lich. 
Dryoc#teEs, Lich. 
Tomicus, Lats. 
P1ItyoGENEs, Bedel. 
XYLEBORUS, Hich. 
Before Mr. Blandford pointed out to me further distinguishing cha- 
racters I had included both Z'aphrorychus, Eichhoff, and Lymantor, 
Lowendal, under Dryocetes ; I had, however, thinking that others might 
not be of the same opinion as myself, appended the extracts given below 
from Bedel (Faune, Col. du Bassin de la Seine, p. 396) and from 
Léwendal’s table in the Entomologiske Meddelser-Andet, Bild. Forste 
Hefte. p. 8. The following is a portion of the table given by M. 
Bedel :— 
