VI 



ANTENNA TA SEXUAL ORGAX* 



487 



special arrangement of these is very varied. Single or paired sperm 

 vesicles (vesiculse seminalis), serving as sperm reservoirs, are often 

 found in the male sex, either as' invaginations of the ductus 

 ejaculatorius or of the vas deferens. Accessory glands enter 

 either the ductus or further back enter the vas deferens and mix a 

 secretion with the sperm. Such glands occasionally yield a hardening 

 secretion which encloses small masses of sperm in the form of capsules 



iltgl 



Od 



Fio. 347. A, Female. 7;, Male sexual apparatus of the Honey-bee (queen and drone) (after 

 R. Leuckart). or, Ovaries, consisting of numerous chambered ovarian tubes ; vd, oviducts ; rs, re- 

 ceptaculum seminis ; va, vagina ; nva, accessory sac of the same ; fcs, bulb of the stinging apparatus ; 

 md, rectum twisted back and cut off; sd, colleterial gland ; gd, poison glands ; gb, poison vesicle ; 

 t, testes ; vd, vas deferens ; e, wider portion of the same ; de, common ductus ejaculatorius ; ad, 

 accessory glands ; p, penis. 



(spermatophores). The terminal section of the male sexual apparatus 

 is often protrusible as a penis. 



Special invaginations from the vagina serve as bursse copulatriees 

 for the reception of the penis during copulation, and as receptaeula 

 seminis for the reception and the preservation of the semen. In the 

 Lepidoptera (Fig. 348) the bursa copulatrix opens outward separately 

 from the vagina, but is connected with the receptaculum seminis by a 

 duct. The sexual apparatus often enters, close to the anus, the base of 

 a common depression (cloaca). As in the male, so in the female, outer 

 organs are formed by the integument of the last abdominal segments, and 

 are brought into the service of the sexual apparatus as ovipositors, etc. 



Colleterial or cement glands for attaching the eggs to foreign 

 objects enter the vagina. 



In most Diplopoda among the Myriapoda the legs of the 7th trunk 

 ring are transformed into copulatory appendages. 



The germ glands of the Hexapoda have still to be specially considered. The 

 testes are, as has been already mentioned, almost always paired ; in^the Lcpidoptcra 



