( 543 ) 



hind edge of the hindcoxa is more ronnded, and the angle above the siuns therefore 

 less pointed ; and the modified abdominal segments also are different. The pronotal 

 comb contains sixteen spines. 



Modified Segiiit'iifs. — c?. The eighth tergite bears, above the stigma, about a 

 dozen bristles, which are much thinner than in X hippia. The portion of the 

 segment below the stigma is a])ically truncate, with the lower angle hardly at all 

 produced, and bears altogether about sixteen bristles, of which seven or eight are long. 

 The eighth sternite is longer and apically more rounded than in A', hippia, being 

 widest beyond the centre, and bears a much larger number of bristles (about fifty 

 on each side). The longest of these bristles is placed at the ventral margin in the 

 neighbourhood of the ajjex. The upper inner angle of the ninth tergite is pointed 

 (in lateral aspect) and the manubrium shorter than in X. hippia. The short 

 process (P) of the clasper is ronnded, the finger (F) broader and shorter tlian in that 

 species, and the ninth sternite somewhat different in shape. The dilated apex of 



this segment is longer than in X. hippia and the spines are fewer in number. 



S . The seventh tergite bears below, and posterior to, the long antepygidial bristle, 

 two or three short ones. The seventh sternite is broader than in hippia, rotundate- 

 truncate, and does not bear a sinns. The eighth tergite has about twelve 

 small bristles above the stigma and four below it. The ventral portion of this 

 sclerite is truncate at the apex, witli the angles ronnded, and bears along the 

 ventral edge five or six bristles accompanied on the inside by four small ones ; 

 above the most distal marginal bristles there are two smaller ones, the lateral 

 outer surface bearing about ten to twelve small bristles, and the inner surface 

 seven or eight slightly stouter ones. The stylet and the anal sternite are longer 

 than in hippia, and the bristles at the apex of the latter much more numerous. The 

 receptaculum seminis is remarkably different, closely agreeing with that of the 

 next species. It is much more strongly chitinised, the head asymmetrically ovate 

 with the mouth produced. 



Length : S (mounted) 3-9 mm. ; ? (not mounted) 4-1 mm. 



1 S from Mutaragwa, Aberdare Mts., British East Africa, March 1 to 14, 1910, 

 off Lophuromys zena. 



1 ? from Mt. Mikeno, Belgian Congo, off Lophwomys spec. 



20. Xiphiopsylla apriona spec. nov. (text-fig. 16). 



?. Similar to A', hi/paretes, hnt at once distinguished by the apices of the 

 abdominal segments not being serrate. 



There is no regular reticulation even on the more incrassate central parts of 

 the abdominal segments, nor are the riilges denticulate as in the two ])receding 

 species. 



The lower angle of the genal process is much more rounded than in A'. Iiiiparetes. 

 The pronotal comb contains only twelve spines, the lobe below the comb being 

 broader (in a vertical sense) thiin tlie pronotura, exclusive of the comb, is long 

 dorsaliy. The proportional lengths of tlie pro-, raeso- and metanota are 24, 40, 30. 

 The long bristles of the abdominal tergites are distally slenderer than in the 

 lirevions species, but still resemble a straight sword, whereas the bristles of tlie 

 Kternites taper gnulually from the base to the tip, not differing from ordinjiry 

 bristles. The postmcdian row of the stcrtiites contains at most twelve bristles. 

 The Hmall bristles placed in front of the postraedian row of tlie tergites :ire less 



