CHARLES ROTHSCHILD, SIPHONAPTERA. 5 



bristles; and a posterior row of three long bristles; in be- 

 tween these rows there are less than 10 bristles, of which 

 the one placed between the second and third bristles (count- 

 ed from above) of the first row, is about as long and thick 

 as the upper bristle of the second row; below the eye, but 

 a little forward, are some small bristles. The occiput has 

 three rows of bristles, an additional long bristle above the 

 centre of the antennal groove, and some small bristles along 

 this groove. The club of the antenna is shorter than in P. 

 hilli. The rostrum does not quite reach to the apex of the 

 före coxa; its apical segment is about as long as the third 

 segment of the maxillary palpus, being shorter than the 

 fourth segment of this palpus. 



Thorax. The pronotal comb is longer than the rest of 

 the pronotum; the latter bears two rows of bristles, of which 

 the anterior one is restricted to the dorsal portion of the 

 segment. The mesonotum has two regular rows of bristles 

 and in front of them two irregular rows, besides small ba- 

 sal bristles. The metanotum has four rows of bristles, the 

 anterior row being represented by a few dorsal bristles only 

 on one side of the body; the metepimerum has 10 bristles 

 and on the other side 12. 



Ahdomen. The anterior tergites bear three rows of brist- 

 les and a few additional dorsal bristles in front of the rows, 

 the posterior segments only having two rows and a few addi- 

 tional bristles on the back. The sternites of segments III 

 to V have, on the two sides together, a row of 5 or 6 long 

 bristles and 5 or 6 long bristles in front of the rows, the 

 numbers on segment VI being 5, 7, and on VII 6, 8, the 

 second figure being that of the posterior row; sternite VIII 

 bears about 16 bristles. 



Legs. Similar to those of P. hilli. The bristles on the 

 outer surface of the hindtibia almost evenly distributed. 



Modified segments. J^. The non-movable process (P) 

 of the clasper sole-shaped (fig. 4); the apical edge of the 

 clasper below this process twice shallowly incurved, the two 

 lobes thus formed quite short and strongly rounded, the low- 

 er lobe being the longer and bearing one bristle at the 

 apex. The finger F is widest at the centre, being concave 

 at the upper (anterior) side and convex on the posterior 

 side. It has three fairly large bristles at and near the wid- 



