NEW NORTH AMEiRICAN BIRD-FLEA — SMIT 



55 



little towards the truncate apex; chaetotaxy of this arm as shown in 

 figiu-e 5. Aedeagal crochet with a fairly long, narrow, and blunt 

 tipped apical portion (fig, 6). 



Female (figs. 9, 10): This sex resembles that of C. a. affinis very 

 closely and the main differences, apart from the average size of the 

 postspiracular areas, are that in the new subspecies the lateral lobe of 

 sternum vii projects to a lesser degree and the margin below the lobe 

 is almost straight (figs. 9, 10), not markedly concave as in C. a. 



Figures 9, 10. — Ceraiopkyllus affinis neglectus, new subspecies, female: 9, sternum vii and 

 spermatheca, allotype; 10, sternum vii and spermatheca, paratype. 



affinis, and the heavily sclerotized basal part of the ductus obturatus 

 is somewhat zigzag-shaped in the three females studied (this may be 

 an abnormality), while this duct is smooth (as is normal) in C. a. 

 affinis. The length of the cylindrical bulga of the spermatheca 

 (figs. 9, 10) appears to be fairly variable, but the siiorter of the two 

 drawn (fig. 10) is like that of the nominate subspecies and is thex-efore 

 presumably the normal type. 



Length: Male, 3 mm; female, 3.5 mm. 



Remarks: We know as yet extremely little about the range of 

 distribution or true host of C. a. affinis; the specimens (2cf, 49) 

 from southwest Finland are from an unknown host (Smit, 1956), 

 but it is most significant that the specimens (11 cT, 209) recorded by 

 Darskaya (1950) from the Vologda oblast (roughly 450 km. north of 

 Moscow) cam^e from the nest of Hirundo rustica [rustica], for C. a. 



