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ENTOMOLOGICAL SOCIETY 



and in Prodoxus decipiens very much smaller. To be more 

 explicit I reproduce from the article referred to the following 

 descriptive details : 



If we examine the internal anatomy, we find that the ovaries are large 

 and pyriform, composed of four multilocular tubes gradually enlarging to 

 the point of insertion in the oviducts and with the opposite extremity pro 

 longed into a binding cord attached to the thorax. The oviducts are 

 rather short. There are two large sebaceous glands and two smaller acces 

 sory glands, and a large copulatory pouch connected with the oviduct by 

 a short tube or canal which opens close to the entrance of the ductus sem- 

 inalis, this leading to the receptaculum seminis. This receptaculum is 

 nearly as large as the bursa, pyriform, flattened dorso-ventrally when 

 empty, but more rounded when filled with semen. Its chief characteristic, 

 however, is a pair of curious brown radiate bodies, the rays or spicules 

 springing from a central hub, which looks like the disc of a composite 

 flower. These bodies are attached at opposite sides of the pyriform sac 

 and are so large and conspicuous as to be readily seen through the walls of 

 the abdomen when this is mounted in balsam. The hub is concave from 

 the outside and convex from the interior, the disc presenting a granulated 

 structure and the spicules radiating from its margin obliquely into the 

 interior of the sac. Each spicule, when closely examined, is seen to have 

 along its inner border a hollow groove running from the base to the 

 extreme tip (Fig. 13 </). There are some seventy or more of the longer 



Fig. 13. a, receptaculum seminis of Pronuba yuccasella, showing radi 

 ate bodies or crushers and muscular structure ; b, same, longitudinal sec 

 tion through axle of hub, showing the main sac and the inner sac at c and 

 the radiate bodies in the intervening space at d X 40. 



