( 540 ) 



pairs of stout dorsal bristles sitnated in notches, inclusive of the apical pair. The- 

 longest bristle of the second hindtarsal segment does not reach the apex of th& 

 fonrth segment. The measurements of the tarsi are as follows : 



Midtarsns: c? 22, 17, 12, 9, 22 ; ? 21, 16, 11, 8, 2U. 



Hindtarsus : S 54, 30, 16, 10, 24; ? 50, 26, 14, 0, 21. 



Modified Segments. — c?. The eighth tergite (text-fig. 13) has the lower apical 

 angle drawn out into a point, and bears five or six short thick bristles above the 

 stigma, and thirteen to fifteen mnch longer ones below it (only the apical ones 

 being drawn in our fignre). The eighth sternite is about one-fourth longer than 

 it is wide dorso-ventrally, bearing twentj'-six to thirt}' bristles, of which one 

 situated beyond the centre of the ventral margin is very long, being drawn out. 



Fig. 13. — Xijihiopsylla hij/jjm. 



into a long thin point. The dorsal outline of the sensory pygidial plate is nearly 

 straight, but the hind edge of tlie plate projects backwards, because the anal tergite 

 is hollowed out dorsally. This groove extends across the segment, and is densely 

 clothed with very thin hairs. The clasper (CI) has a very slender manubrium 

 (M), which bears a groove along the upperside and very slightly bends upwards 

 at the end. Above tlie insertion of the movable process (F) the clasper is produced 

 into a very short, almost rectangular process (P), which bears two long bristles 

 and one short one. There are no bristles on the clasper near the insertion of the 

 "finger "(F). The latter process is very long and very slender, being of nearly 

 the same width tliroughout, except for taix'ritjg to a point at the apex, which is 

 slightly curved iijjwards. The two halves of the ninth sternite (IX. st.) are united 

 from the base to the centre, and have one long wire-like internal lever. The distal 



