44 



THE CLASS OF INSECTS. 



first, of the ductus ejaculatorius, wliich opens into the exta'nal 

 intromittent organ. This duct extends backwards, connecting 

 with the vesicuha seminales, which hud by 

 the vasi.i differentia to the testes (F^. 53). 

 The latter are usuall}' rounded glandular 

 bodies, sometimes, as in Meloladlia and 

 Lucanns, numbering six on a sirfe. These 

 organs lie in the abdominal ca\itv, usuall}' 

 above and on each side of tli£ alimentarj' 

 canal. 



The sperm, or fertilizing fluid, contains 

 very active 

 spermatic par- 

 ticles which 

 are developed 

 in large cells 

 in the testes, 

 where they are 



into bundles of various 



united 

 forms. 



In the female, the internal re- 

 productive organs (Fig. 54) are 

 more simple than those of the 

 other sex. The external open- 

 ing of the female is situated at 

 the end of the oviduct, that 

 leads by two tubes to the ovary, 

 which consists of two or more Fig- 5i- 



tubes (in the Queen Bee one hundred and sixty to one hundred 

 and eighty) in which the ova are developed. On the upper side 



Fig. 53. Male organs of Athnlia centifolke. h, the penis, or external portion, 

 in wliich the ductus ejaculatorius (/) terminates, wliioh extends backwards, and is 

 connected with the resiciihe semiiutles (e), and rasa differentia (<I) -vvliich are con- 

 nected with the epididymis (b), and the testes (a), i and /, two pairs of horny plates, 

 surrounded by a horny ring (!:). i, horny prehensile hooks attached to /.-. m, two 

 elongated nmscular parts inclosing the penis (fi). — From Keirport. 



Fig. 5-t. Female organs of generation of .-();/i(77(ff cc»/(Yo?iVp. o, i, c, the eighteen 

 ovarial tubes .originating from each of the two oviducts (e), and containing the im- 

 mature eggs;/, the spermatheca; </, poison-sac, the poison being secreted in the 

 Sjecretory vessels h. The poison flows through the oviduct into the sting and thence 

 into the wound made by the sting. 10, the terminal ganglia of the nervous cord. 

 -^ Fro7n Kemport. -■ 



