BASED ON A STUDY OF THE MALE GENITAL ARMATURE. jal 
macerated in caustic potash for a few minutes this organ, which is really 
modified segment of the abdomen, can be turned backwards, as shown in fig. 2, so 
Vulviform x 
Ny) iy 
Ne 
iN A 
WW Nat 
Mi 
Natit 
NH AN \y 
sii AA 
! 
Wy iit NA 
Fig. 1—Hypopygium of male Glossina, as seen when closed ; the dotted lines indicate 
the position of the superior claspers beneath it. 
that its ventral surface together with its various and complicated structures are 
displayed. ‘These appendages are : 
1. Superior Claspers (sc in all the figures). The position of these organs when 
the hypopygium is closed has already been described and it is indicated by the 
dotted lines in fig. lsc. These organs can be erected to an angle of varying 
degrees ; but in life they are never extended backwards so as to lie in a 
horizontal position or in the same plane as that of the abdomen, and considerable 
pressure is necessary to bring them into this position (see dotted lines in fig. 2). 
HUNAN) 
ww WW \ aN ir 
\ NALS NN vi 
NAR 7 iN 
Inferior_ 
clasper 
Editum 
Juxta & penis 
Superior 
clasper ‘ fe = Connecting 
A\ ‘ ie , membrane 
i Ss ils ae a 
Harpe — = STN SU I vs : 
ees: \___ ss Connecting 
Superior ‘ ‘membrane 
clasper : 
Fig. 2.—Hypopygium of male Glossina extended backwards so as to display the 
genital armature. 
