( 5'7 ) 



The S specimen bears on the sixth abdominal segment a long and stent 

 apical bristle corresponding to the antepygidial bristles of the seventh segment. 

 The apical margin is sinuate where this bristle is placed. 



40. Dinopsyllus ing'ens Roths. (1900). 



Typhlopsylla iiigens Rothschild, En(. Rec. xii. p. 37. t. 2. fig. 4 (1900) (Cape Colony). 



A strongly modified species. The combs of the head and abdomen have almost 

 disappeared, while the bristles, particularly those on the legs, are more numerous 

 and longer than in any other species of Dinopsyllus. The species is only known 

 from South Africa. 



Key to the species of Dinopsyllus : 



I. Surface of body densely reticulated ; five genal spines. 



a. Comb of third abdominal segment containing at least eight spines, 



metepimerum with at least thirty-five bristles. D. echinus spec. nov. 



Comb of third abdominal segment containing three spines, metepimerum 



with twenty-seven or less bristles . . D. hirsutus Roths. (190S) 



II. Surface of body with dorso-ventral lines ; five genal spines. 



A. c? cJ (not known of eremus). 



i. Vestigial frontal tubercle in or below centre of frons . . . c. 

 J, „ ,, above centre of frons . . . ■ d. 



c. The two bristles placed near the ventral distal angle of the eighth 



sternite close together . . . . D. ellobius Roths. (1805) 

 These two bristles widely apart . . . . D. hempi spec. nov. 



d. Long process of clasper curved upwards from base to centre 



D. gri/purus spec. nov. 

 The upper and undersides of this process convex . . . . e. 



e. Ventral apical angle of eighth sternite strongly produced ; two bristles 



at tip of angle very close together . . . I>. apistus spec. nov. 

 The angle rounded oft' . . . . . • • • ■ /■ 



f. The row of bristles on the ninth sternite almost continuons . 



D. korridus spec. nov. 

 The row widely interrupted ....■■■ g- 



g. Combs on second and third abdominal segments with eight or more 



spines D. longifrons spec. nov. 



These combs with six or less spines . . . D. lypusus spec. nov. 



B. ? ? (not known of kempi and grypitrus). 



h. Head of receptaculura seminis without hump . D. eremus spec. nov. 



,j „ „ with prominent luiiup . . . i. 



i. Metepimerum with more than twenty-eight bristles . . . j. 

 ,, „ less than twenty-six ,, ... /<■. 



j. First abdominal tergite with apical spines . /A lion-idux spec. nov. 



„ „ „ witliout apical spines D. longifrons spec. nov. 



/■. Distance from frontal oral angle to tip of first genal spine larger than 

 distance to frontal tiiberch; . . . J>. dlohius Roths. (1905) 

 The former distance shorter than the latter. iK lypusus spec. nov. and 



l>. iipistus s]iec. nov. 



III. to ~; genal spines /^ ,//y,v/.s Itollis. ( I'.iiiU) 



