ANATOMY AND PHYSIOLOGY 



141 



Homologies. As in other animals, the reproductive or- 

 gans are homologous in the two sexes. Thus: 



MALE. FEMALE. 



Testes = Ovaries 

 Seminal ducts = Oviducts 

 Ejaculatory duct = Vagina 



Seminal vesicle = Seminal receptacle 

 Accessory glands = Accessory glands 

 Penis and accessories = Ovipositor 



Male Organs. Each testis, though sometimes a single 

 blind tube, is usually a group of tubes or sacs (Fig. 178), 

 testicular follicles, which open into a seminal duct (vas defer- 



FIG. 180. 



FIG. 181. 



Spermatozoa. A, locustid 

 grasshopper; B, cockroach, 

 Blatta; C, beetle, Copris. 

 After BUTSCHLI and BAL- 



LOWITZ. 



Reproductive system of queen 

 honey bee. a, accessory sac of 

 vagina; b, bulb of stinging ap- 

 paratus; c, colleterial, or cement, 

 gland; o, ovary; od, oviduct; p, 

 poison glands; pr, poison reser- 

 voir; r, receptaculum seminis; 

 re, rectum; i', vagina. After 

 LEUCKART. 



ens). In most Lepidoptera the testes are secondarily united 

 into a single mass (Fig. 179) as also in Acridiidse. The two 

 seminal ducts enter the common ejaculatory duct, which ter- 



