;o6 



THE GENERATIVE ORGANS. 



At a still later period, when the nymph is covered with black 

 hairs and is nearly mature, the paired oviducts, tubae, still end 

 in caecal ends, and are seen to be connected with the ovarian 

 capsule by broad ligamentous bands. The termination of the 

 parovarium in the substance of the ovary is also well seen in 

 this stage of development. 



These observations lead me to the following conclusions : 



1. The paired oviducts are not developed from the genital 

 cords, but, like the azygos oviduct, originate from the hypo- 

 dermis. 



2. The paired oviducts are not homologous with the duct of 

 the testis in the male, but, like the Miillerian ducts of the Verte- 

 brate, originate from distinct embryonic structures. 



cv. 



Fin. 102. The utero-vaginal tube and oviduct on the fifth day of the pupa stage. 

 ov, rudimentary oviduct ; fo, ducts of the parovaria ; r s, receptacula seminis ; 

 v, vagina. 



3. The parovaria correspond with the vasa cfferentia and 

 vas deferens, and are part of the primitive gonad. 



The investigation of the condition of the gonads and their 

 ducts in Hermaphrodite Insects is of great importance in rela- 

 tion to these views. Unfortunately the information on this 

 subject which we possess is too small to allow any definite con- 

 clusions to be drawn from the phenomena of hermaphrodism. 

 The rarity of such forms is well known, and those who possess 

 them seldom allow a specimen to be dissected. "With the 

 exception of Tetens [334], I know no author who has described 

 the internal organs of hermaphrodites in detail, and, unfortu- 

 nately, the dissections made by him throw no light on the 

 relations of the vasa efferentia and the oviducts. 



