CHARLES ROTHSCHILD, SIPHONAPTERA. 3 



rounded, while the distal margin is nearly straight. The 

 movable finger (F) is broadest proxiraally to the centre, 

 gradually narrowing from this point to the apex. The proxi- 

 mal margin is nearly straigt, being slightly incurvcd dis- 

 tally, while the posterior margin is feebly convex; the vent- 

 ral portion of the posterior margin is incurved proximally 

 to the centre of angle. The anterior margin is densely 

 fringed with bristles, whereas the bristles of the posterior 

 margin stånd far apart. The apex of the internal (vertical) 

 arm of the ninth sternite (IX. st.) is produced into a rather 

 narrow process pointing frontad. The horizontal arm bears 



Fig. 2. Pygiopsylla pavida (f. 



very numerous bristles at and near the apex, differing from 

 rotschildi particulary in the ventral bristles not being stout, 

 blunt and black, but having the shape of ordinary bristles. 

 The proximal end of the parameres is normal in shape, its 

 ventral edge being rounded and the angle somewhat produ- 

 ced upwards and anad. In rothschildi the proximal (broad) 

 portion of the parameres is abrubtly curved anad. — $. The 

 seventh sternite (textfig. 3) bears a narrow lobe on each 

 side, below which the segment is deeply sinuate. The size 

 of the lobe varies slightly, as does also the contour of the 

 rest of the segment. The head of the receptaculum seminis 

 is more than twice as long as ib is broad and three times 

 as long as the tail. 



