BASED ON A STUDY OF THE MALE GENITAL ARMATURE. 21 
lateral margin. Kditum or extension of the body wall (¢) with very few bristles. 
Inferior claspers (7c) relatively small and narrowed basally on both sides ; bristles 
at the sides short. Median process (mp) a little more than twice the length of 
the inferior claspers, gradually dilated towards the apex and of a clear horn- 
yellow colour ; it is so highly chitinised as to resist the action of stains, and stands 
out in marked contrast to the surrounding organs ; it is also so large that it can 
be seen with the aid of a pocket lens only. Harpes (h) with the tips of the 
larger process broadly dilated ; there is also a long narrow and slightly curved 
sclerite overlapping the broader process ; these appendages are partly covered 
by the thin membrane which protects and envelopes the penis-sheath ; extending 
obliquely across the harpes is a band of minute spines which are strongly dilated 
proximally. On the proximal surface of the juxta is a bilateral row of squamose 
spines (s). The juxta in dorso-ventral view (fig. 7, 7) presents a distinctly 
elongated, triangular outline; but in profile (fig. 6) only one of the lateral 
sclerites (j) forming the juxta is visible in the same focal plane as the harpe. 
Glossina longipennis, Corti. 
Genital armature of the male (fig. 8). Superior claspers (sc) free, as in the 
other members of the fusca group; relatively short and stout, apices rather 
Fig. 8. Male armature of Glossina longipennis, Corti ; ventral view. 
