Notes on Reproductive Organs of the Pine Weevil. 163 
and the paired oviducts there appears, in the insect approaching oviposition, 
a brown substance, the corpora lutea. 
The bursa copulatrix opens from the uterus as a diverticulum almost as 
large as that organ itself. At the base of the bursa the receptaculum seminis 
opens into the uterus by a long narrow tube (Fig. 2). This tube, together 
re 
We 
Portion of reproductive organs of 
Hylobius abietis highly enlarged, 
0. Uterus ; 
B.c, Bursa copulatrix ; 
R. Receptaculum seminis ; 
V.p. Vaginal palpi. 
Ices aly 
Femaie reproductive organs of Hylobius abietis, 
T.c. Terminal chamber ; 
£. Hgg-tubes ; 
C.l. Corpora lutea ; 
O.d. Paired oviduct ; 
U. Uterus or unpaired oviduct ; Fie. 3. 
&. Receptaculum seminis ; 
B.c. Bursa copulatrix. 7th and 8th terga of female 
P, Vaginal palpi. Hylobius abietis. 
with the receptaculum, is clothed with muscle which serves to compress the 
sac and so cause the sperms to pass into the uterus for the fertilisation of the 
passing ovum. — 
The receptaculum seminis is a hook-shaped vesicle clothed with chitin, 
and appended to it is a sac-shaped diverticulum. Nusslin’ calls this an 
1 Leitfaden der Forstinsektenkunde, 1913 ed., p. 269, fig. 235, 
