PLATE XXX 



Figure 1. Genital apparatus of Glossina palpalis, ? > dorsal 

 view, after Roubaud. 



O., the oldest egg. o'., nurse cells of the second foll- 

 icle. Od., oviduct. Od. C., common oviduct. Sp., 

 spermathecae. C. Sp., their duct. Gl., uterine glands. 

 C. gl., their common excretory duct. Ut., uterus. V. 

 vagina. M.r., retractor muscles of the uterus. M.p.d., 

 M.p.v., dorsal and ventral protractors of the uterus. 

 M.d., Dilator muscles of the vagina. The figures 1. 

 2, 3, ... 8 represent the relative age and order of suc- 

 cession of the different ovules. 



The genital apparatus of Musca bezzii, ? . a.g., 

 accessory gland. Other letters as before. X 10. 

 The genital tract of Melophagus ovinus, 5? , dissected 

 from the body, and seen from the dorsal side. After 

 Pratt, x 33. med. ovi., median oviduct, pa. ovi., 

 paired oviduct. rec. sem., receptaculum seminis. 

 a.m.gl., anterior milk glands, ov., ovary, p.m.gl., 

 posterior milk glands. U., uterus, vag., vagina. 



Figure 4. Longitudinal section of the two ovaries, the paired 

 oviducts, and the receptaculum seminis, of Melophagus 

 ovinus. ovar. 1., ovar. 2., the two ovarioles of each 

 ovary. 1, 2, 3, ... 8, the different follicles in the order 

 in which they discharge their ova. n.ce., nutritive 

 (nurse) cells, ger., germarium. After Pratt, x 52. 

 (reduced from original.) 



Figure 2. 

 Figure 3. 



