Notes on Reproductive Organs of the Pine Weevil. 165 
The eighth tergum (Fig. 7) in the male is larger than that,in the 
female, and is not covered by the seventh. 
The seventh tergum is also larger than that in the female. It is 
interesting to note that in the German examples of A. abietis, this segment 
bears what appears to be a rudimentary stridulating organ which is absent 
in the British examples, or in the rare cases when it occurs (I have found 
it only in two specimens) is barely perceptible. 
Wie, 4, 
8th sternum of male and female 
Hylobius abietis respectively. 
S.p. Sternal plates. 
Fic. 6. 
Male reproductive organs of Hylobius abietis. 
T. Testes ; 
V.d, Paired vasa deferentia ; 
S.v. Seminal vesicle ; 
S.t. Seminal tubes ; 
V.d, Vas deferens ; 
P. Penis. 
ICE By 
Spiculum ventrale. 
On either side of the tergum is a row of bristle pits, fifteen to eighteen 
in number, from which project strong, short spinulae altogether different 
from the bristles and spines on the rest of the segment. In the British 
specimens these rows. of spines are absent. 
The eighth sternum (Fig. 4) of the male is narrower than that of the 
female. Attached to it are two sternal plates which serve to guide the 
penis when it is exserted. The chitinous parts of the penis consist of 
