184 ANATOMY. 



all organs, therefore, which display germs (eggs) are female, and all 

 which prepare spermatic moisture must be called male. The female 

 sexual organs of insects consequently display bags full of eggs, ovaria; 

 the male, sperm-secreting vessels or glands ; from both originate the 

 above characterised closer or more distant evacuating ducts, which are 

 pretty uniform in both sexes. We may consequently distinguish in 

 both female and male organs different divisions, which are, however, 

 connected together, and which must necessarily constitute the different 

 divisions of our description of the sexual organs. 



135. 

 I. OP THE FEMALE ORGANS OF GENERATION. 



The female sexual organs (genitalia feminina) of insects consist of 

 internal and external ones; the internal ones of OVARIES, the OVIDUCT, 

 the UTERUS, other peculiar appendages, and the VAGINA ; the exterior 

 ones of the ORIFICE OF THE VAGINA, and its appendages, as the 



ACULEUS, the VAGINA TUBIFORMIS, and the VAGINA BIVALVIS. 



It is not always that all the above named parts are present together, 

 either one or several are wanting, the ovaries are deficient only in 

 barren, undeveloped females (the neuter bees, &c.), but the evacuating 

 ducts never ; all other appendages may, on the contrary, disappear. 



A. INTERNAL SEXUAL ORGANS. 

 136. 



THE OVARIES. 



The ovaries are tubes or bags in which the eggs are secreted from 

 the formative substance of the creature, and where they remain until 

 their impregnation. We always find in insects two such organs of 

 similar structure in the same individual ; they are so placed that one 

 lies on each side of the intestinal canal, generally filling the lateral 

 space in the abdomen. In colour they are generally yellow, but in 

 form they are subject to many varieties, which, however, may be classed 

 under the following divisions : 



I. The ovaries are simple bags, in which the germs of the eggs ar 

 contained. This primary form, which is the most simple of all, is 

 subjected to no subordinate differences *. 



* The ovarium saccatum described by J. M'uller in Nova Acta Phys. Med., torn, xii, 

 p. 612. does not belong here, but will be classed below, with the ovarium furcatum. 



