NOTES ON THE FIVE-COMBED BAT-FLEA8. 27. 



men as in a mounted (flattened) one. The size of the lobes 

 varies somewhat in different individuals. 



Koienati's specimens in the Vienna Museum belong to this 

 species. N. eusarca is widely distributed, and apparently the 

 commonest of the five-combed bat-fleas. It appears to vary 

 geographically, as the specimens before us from different coun- 

 tries do not exactly agree with one another. The material, 

 however, from the Mediterranean countries which we have is 

 quite insufficient to decide such a delicate point, and we therefore 

 can at present establish but two geographical races. 



(a) Nycteridopsijlla eusarca eusarca, Dampf, I. c. 



The author of eusarca has kindly given me in exchange a 

 male and female of this form. These two specimens show that 

 Dampf must have made a mistake when he especially stated that 

 the head of eusarca did not bear any bristles along the posterior 

 edge. All our specimens of this species have a row of bristles in 

 that place, as in the allied species (PL I. fig. 2). The movable 

 finger of the clasper of the male is rather broad, being but 

 slightly narrowed towards its base. The eighth tergite of the 

 male has three long bristles at the upper edge between the 

 stigma and the apical margin, besides a few shorter ones on 

 the side. 



We have no specimens exactly agreeing with this form except 

 the pair of co-types from East Prussia. A series of Austrian 

 specimens are intermediate between N. e. eusarca and the British 

 form described below, these Austrian specimens having the same 

 small size as N. e. eusarca, while in the modified segments of the 

 male they approach the British subspecies. 



(b) Nycteridopsijlla eusarca major, subsp. nov. 

 Ceratopsylla pentactenus, Saunders (nee Kolenati, 1856, err. 



determ.), Eut. Mo. Mag. (2), vol. iii. p. 66 (1892). _ 

 Nycteridopsylla pentactenus, Eothschild (nee Kolenati, 1856, 



err. determ.), Entom. vol. xli. p. 281 (1908). 

 Both sexes are distinctly larger than in N. e. eusarca. The 

 eighth tergite of the male bears four long bristles at the dorsal 

 edge distally to the stigma ; the movable finger of the clasper, 

 though var^dng somewhat in individual specimens, is always 

 strongly widened above the centre on the proximal side (PI. I. 

 fig. 3) ; the non-movable process, moreover, is broader than 

 in N. e. eusarca. The tibiae have a few more lateral bristles on 

 the inner and the outer side in both sexes. The lower lobe of the 

 seventh sternite of the female is on an average broader than in 

 Continental specimens. 



We have three males off Scotophilus noctula, obtained by 

 Dr. D. Sharp at Cambridge in January, 1892, and one male and 

 five females from the same locality and host collected by Mr. 



d2 



