264 Journal of Comparative Neurology and Psychology. 



two lips covered with short hairs (Fig. i, Ov.). The ovipositor 

 when not functioning is shielded by chitinized plates, two dorso- 

 lateral and one ventral (Fig. i, D.pl. and V.pl.^). Upon the dor- 

 sal and lateral walls of the ovipositor, also shielded by the dorso- 

 lateral plates, are certain extensible glands, the alluring glands, 

 which serve to attract the male at mating time. There are three 

 other essential parts to the system, as follows: A pair of coUe- 

 terial or cement glands (Fig. i, Col.gl.) open by a common duct 

 into the vagina through its dorsal wall posteriorly. These glands 

 secrete a fluid that flows into the vagina and accompanies the 



WAg. 



Fig. I. Anatomy of the Reproductive System (Bombyx mori). Ov., ovipositor; V., vagina; Od., 

 oviduct; O.t., ovarioles; Be, bursa copulatrix; C, copulatory pore; Col.gl., coUeterial glands; 5/)., 

 spermatheca; Sp.gl., spermathecal gland; D.pl., dorsal plate; V.pl.^, ist ventral plate; V.pl.-, 2d ventral 

 plate; Ah.g., abdominal ganglia (2, _J, 4, 5); A, position of the "alluring glands." 



fertilized egg through the ovipositor, firmly fixing the egg to a sur- 

 face, by hardening as it is exposed to the air. The bursa copula- 

 trix, a large sac-like organ (Fig. i, B.c.^ and the spermatheca 

 with its spermathecal gland (Fig. i,Sp.) open separately (seemingly) 

 by means of ducts into the vagina, the latter a little forward of the 

 former. The mechanism of the intimate connection that must 

 exist between the internal opening of the bursa and the opening 

 of the spermatheca was not determined. The bursa copulatrix 



