28 THE ENTOMOLOGIST. 
William Farren in 1900 and 1908. This species appears to be 
local in the British Islands. We have not found it or heard 
of it being taken on Noctules from any locality other than 
Cambridge. 
3. Nycteridopsylla longiceps, Rothsch. 
Ceratopsylla pentactenus, Rothschild (nec Kolenati, err. de- 
term.), Novit. Zoolog. vol. ii. p. 66 (1895) ; id., l.c. vol. v. 
p. 542 (1898). 
Nycteridopsylla longiceps, Rothschild, Entom. xli. p. 281 (1908). 
This species, when originally described in the ‘ Entomologist,’ 
was, as stated above, compared with N. eusarca major, that form 
being then erroneously identified as the true pentactenus. The 
male of the present species can be recognized at once by the 
great length of the head. In the female, however, this difference 
is not so apparent, as in eusarca the length of the head is con- 
siderably greater in the female than in the male. The modified 
segments of both sexes of longiceps are very distinctive taxonomic 
characters. In the male the movable finger of the clasper is 
very broad, and the apex of the ninth sternite is very much 
more obtuse than in N. eusarca. The seventh sternite of the 
female has but a single sinus on each side, the lobe above the 
sinus projecting far less than the one below it. 
We have received examples of this species from Great Britain, 
Firenze (Italy), and from Adana (Asia Minor). In fact, it 
appears to be the only member of the genus which is fairly 
widely distributed in the British Islands. Our British speci- 
mens have been collected from the following hosts: Scotophilus 
piprstrellus, Plecotus auritus, and Vespertilio nattereri. 
4, Nycteridopsylla bouchei, Oud. 
Nycteridopsylla boucheit, Oudemans, Tijdschrift voor EHnto- ~ 
mologie, Verslag, p. lix (1906). 
Pulex vespertilionis, Bouché, Nov. Acta Acad. Leop. Carol. 
XVli. i. p. 508 (1835). 
¢ Typhlopsylla hexactenus, Tasch., Die Flohe, p. 89 (1880). 
Dr. Oudemans renamed Pulex vespertilionis of Bouché under 
the above name, stating that he considers this insect to belong to 
his new genus Nycteridopsylla on account of its possessing an 
eye. In Bouché’s original description no reference is made to an 
eye at all, and we are inclined to think that Taschenberg was 
correct in considering Bouché’s species to be identical with 
hexactenus of Kolenati. Dr. Oudemans, however, is correct in 
rejecting the name vespertilionis, as it had previously been 
eeuoyied by both Curtis* and by Dugés.t 
* Ceratophyllus vespertilionis, Samouelle, in Curtis, Brit. Ent. vol. ix. 
No. 417 (1832), though Samouelle never described or mentioned any Pulex 
vespertilionis. 
+ Pulex vespertilionis, Dugés (nec Bouché), Ann. d. Science. Nat, vol. 
xxvil. p. 161 (1882). 
