246 GLOSSINA [CH. 



hectors. When the hypopygium is turned back a system of 

 complicated appendages is displayed, the arrangement and 

 structure of which have been shewn by Newstead to be of great 

 use in classification. These appendages are briefly as follows : 

 the superior claspers, whose chief function is apparently to 

 grip the abdomen of the female ; the editum ; the inferior 

 claspers, which present very striking morphological differences 



Pr 



Fig. 64. Gravid uterus of G. palpalis containing a larva at an advanced stage 

 of development. Dorsal view x 10. 



C.G.gl., common excretory duct ; CL.gl. principal lateral trunk of 

 the uterine glands ; L, body of the larva ; O.O., ovary ; Pr., caudal 

 protuberances of larva ; R.gl., ramifications of uterine gland ; Sp, 

 spermatheca ; Ut, uterus ; V, vagina. (After Roubaud.) 



in the various groups ; the harpes, small bilateral appendages 

 most highly developed in the fusca group and rudimentary or 

 absent in the remaining groups ; the juxta, or penis sheath ; 

 the penis ; the median process, present only in the fusca group, 

 lying in the middle line between the inferior claspers ; and the 

 connecting membrane, present in the palpalis and morsitans 

 groups, but absent in the fusca group. 



