MORPHOLOGY OF THE LEPIDOPTERA. 185 



Fig. 63. A transverse section through one, the right, of the paired oviducts from a pupa between seven 

 and eight days old. 



Fig. 64. A small portion from the wall of the azygos oviduct, the same section that is drawn fig. 55 c, 

 PI. XVIII. It is the left-hand portion just above the dotted line leading from the letters od! 

 The cells of the wall, w, of the oviduct with their nuclei are plainly seen, together with an 

 aggregated mass of mesoblast cells, m, on the outer surface of the oviduct. Obj. D, oc. 2, 

 Zeiss, draw-tube in. 



Fig. 65. Transverse section from a one day old pupa of the tube connecting the sebaceous apparatus to 

 the hinder end of the azygos oviduct, the external opening of which was cut through five 

 sections in front of the one here figured, d.v.gl., the tube which becomes subsequently the 

 common duct of the sebaceous vesicles, m, mesoblast cells. Compare fig. 38, PI. XVII. 



Fig. 66. The next section posterior to the preceding, showing the central cavity, d.v.gl., continuous 

 with the duct, and the two lateral cavities, v.gl., which become subsequently the vesicles 

 of the sebaceous gland. 



Fig. 67. Transverse section from a two days old pupa showing, v.gl., the sebaceous vesicles ; d.v.gl., 

 their common duct, nearly vertical in position ; od! , the lumen of the azygos oviduct opening 

 by the oviducal or posterior aperture to the exterior, m, mesoblast cells ; h, hypodermis of 

 the body- walls ; cu., the pupal cuticle, V-shaped and indicating the median ventral furrow of 

 the pupa seen in fig. 7, PL XV. 



Fig. 68. The following section. The common duct, d.v.gl., of the sebaceous vesiclesis seen opening medianly 

 between the vesicles, v.gl. od! , the posterior end of the lumen of the azygos oviduct, m, 

 mesoblast cells intruding between d.v.gl. and od! h, the hypodermis of the body-wall. 



Fig. 69. A combined drawing of two consecutive sections from a pupa between six and seven days old, 

 showing the lumen of the azygos oviduct, od.', communicating by a short seminal canal, g.c, 

 with the duct, d.b.c, of the bursa copulatrix. m, mesoblast cells. There are traces of a delicate 

 cuticle in the oviduct and seminal canal. 



Fig. 70. A combined drawing of two consecutive sections from a pupa between five and six days old, 

 showing the minute and transitory pyriform vesicle, the homologue, probably, of the pyriform 

 capsula seminis as it is usually seen in Lepidoptera, appended to the receptaculum seminis. 

 r.s., the receptaculum seminis. 



Fig. 71. Transverse section through the hypodermis, just anterior to the bursal aperture of a pupa 

 between five and six days old, to show the ridge of elongated cells which subsequently form 

 the transparent elliptical body, e.b., fig. 20, PI. XV., covering the bursal aperture of the imago. 



Fig. 72. A similar section close to the bursal aperture of a pupa seven to eight days old. The elongated 

 cells are cut obliquely, d.b.c, the wall of the bursal duct cut parallel to the duct, cu./., 

 irregular lamella and filaments of the cuticular liquid (?) formed about this period. 



Fig. 73. View from the internal aspect, showing the rectum, ?•., cut through ; o.ap., the terminal portion 

 of the azygos oviduct; od.gl., the two odoriferous glands meeting in a common vestibule; and 

 f,f, the folds of hypodermis which constitute the terminal papilla of the abdomen. From a 

 dissection of a pupa between nine and ten days old. 



Fig. 74. Transverse section to show the origin of the odoriferous glands in a pupa between five and six 

 days old. od! , the azygos oviduct, showing the commencement of the common duct of the 

 sebaceous vesicles, m, mesoblast cells, od.gl., odoriferous gland of the right side, a simple 

 tubular invagination of the hypodermis, h. 



Fig. 75. A similar section from a pupa six to seven days old. od! , the azygos oviduct, two sections in 

 front of the one in which the common duct of the sebaceous vesicles appsars. m, mesoblast 

 cells, od.gl., the left odoriferous gland. The aperture of the right gland is shown. The 

 apertures of the two glands are now nearer to oue auother, anil the vestibule, /', is forming. 

 x , indication of the lateral fold to form the terminal abdominal papilla. 



