NEW NORTH AMERICAN BIRD-FLEA— SMIT 



53 



well developed, though still very conspicuous and larger than in any 

 other species of the genus. The new subspecies differs from the 

 nominate form in the male b}'^ the longer movable process of the clasper 

 (fig. 5) and the much more weakly developed spiculose area of tergum 

 VIII (fig. 7); in the female by the slightly less prominent lateral lobe 

 of sternum vii (figs. 9, 10) and a somewhat zigzag-shaped sclerotized 

 portion of the ductus obturatus (if this latter characteristic proves to 

 be constant, which seems doubtful). For figures of pertinent struc- 



FiGURES 5-8. — Ceratophyllus affinis neglectus, new subspecies, male: 5, clasper, sternum ix 

 and sternum viii, holotype; 6, aedeagal crochet, holotype; 7, dorsal part of tergum viii, 

 holotype; 8, processes of clasper, paratypc. 



