238 w. wescbe on genitalia of tsetse fly, glossina palpalis* 



Explanation of Plate 15. 



Kig. 1. ITypopygium seen from below. 

 ..2. „ removed from the abdomen, and showing 



the position of the adminiculum and appendages; 



the lettering as in the figure in the text. 

 ,, 3. Rod situated in the bifurcation of the chitinous struc- 

 ture of the penis, and considered to be the rudiment 



of the central apodeme. 

 ,, 4. Chitinous structure of the penis, showing the situation 



of the rod, and the two plates that connect with the 



surrounding structure. The upper plates (Fig. 7) 



are removed. 

 5. End of the last segment, showing the forcipes superiores 



turned under and the rudiments of the forcipes 



inferiores. 

 ,, 6. Chitinous structure of the penis, seen from the front, 



and showing the upper plates and central rod. 

 ,, 7. Diagram of the upper plates, when dissected and 



flattened out. 



8. Extremities of hairs on the forcipes interiores. 



9. Forcipes interiores and genital palpus. 

 1<>. Part of membrane of penis, near the upper part of the 



organ. 

 11. Part of membrane on the genitalia of the male of 

 Apis melifica L., drawn to the same scale as Fig. 10. 



5? 



11 



Journ. Quekett Microscopical Club, Ser. 2, Vol. IX., No. 57, November l'J0-">. 



