NOTES ON THE FIVE-COMBED BAT-FLEAS, PAT | 
men as in a mounted (flattened) one. The size of the lobes 
varies somewhat in different individuals. 
- Kolenati’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) Nycteridopsylla eusarca eusarca, Dampf, l. ¢. 
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. eusarea, while in the modified segments of the 
male they approach the British subspecies. 
(b) Nycteridopsylla eusarca major, subsp. nov. 
Ceratopsylla pentactenus, Saunders (nec Kolenati, 1856, err. 
determ.), Ent. Mo. Mag. (2), vol. i. p. 66 (1892). 
Nycteridopsylla pentactenus, Rothschild (nec 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 varying somewhat in individual specimens, is always 
strongly widened above the centre on the proximal side (PI. I. 
fig. 8); the non-movable process, moreover, is broader than 
in N. e. eusarca. The tibize 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. 
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