^y. iiiTCHiE 



191 



FEMALE REPRODUCTIVE ORGANS OF C. ABIETIS. 



Fig. 13 depicts the reproductive organs of a female about to proceed 

 to egg-laying. 



Fig. 13. Reproductive organs of female C. abietis about to lay eggs (greatly magnified). 



There are two ovaries, one on each side of the abdomen. Each 

 ovary (0.) consists of two egg-tubes, which open into the paired oviduct. 

 At the anterior extremities of each egg-tube there is a terminal nutritive 

 chamber (iV.c.) and at its apex a terminal filament {T.f.). The eggs pass 

 from the egg-tubes to the oviducts which unite posteriorly to form a 

 common duct — the uterus [U.) and the vagina (F.). Uniting with the 

 posterior portion of the uterus we have the bursa copulatrix {B.C.) 

 enclosed in the anterior end of which is the receptaculum seminis (sper- 

 matheca) {R.s.) and bearing anteriorly also the accessory gland (A.g.). 



Repeated dissections of the reproductive organs of numerous females, 

 both immature and mature, were made with the object of ascertaining 

 definitely whether a slime or a pair of slime glands were present or not, 

 but in all these I failed to observe any trace of them. (Such slime glands 

 are present in the female reproductive organs of many Scolytids and 



13—2 



