28 THE ENTOMOLOGIST. 



William Farren in 1900 and 1903. 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, Kothsch. 



Ceratopsylla pentactenus, Eothschild (nee Kolenati, err. de- 

 term.), Novit. Zoolog. vol. ii. p. 66 (1895) ; id., I. c. vol. v. 

 p. 542 (1898). 



Nycteridopsylla longiceps, Eothschild, 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 pentactejius. 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 fmger 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. 



W^e 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. Oar British speci- 

 mens have been collected from the following hosts : Scotophiliis 

 pipistrellus, Plecotiis auritus, and Vespertilio nattereri. 



4. Nycteridopsylla bouchei, Oud. 



Nycteridopsylla bouchei, Oudemans, Tijdschrift voor Ento- 

 mologie, Verslag, p. lix (1906). 



Pulex vespertilionis, Bouch6, Nov. Acta Acad. Leop. Carol, 

 xvii. i. p. 508 (1835). 



? Typlilopsylla hexactenus, Tasch., Die Flohe, p. 89 (1880). 



Dr. Oudemans renamed Pulex vespertilionis of Bouche 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 Bouch^'s original description no reference is made to an 

 eye at all, and we are inclined to thhik that Taschenberg was 

 correct in considering Boache's species to be identical with 

 hexactenus of Kolenati. Dr. Oudemans, however, is correct in 

 rejecting the name vespertilionis, as it had previously been 

 employed by both Curtis* and by Duges.t 



■■'• Ceratophyllus vespertilionis, Samouelle, in Curtis, Brit. Ent. vol. ix. 

 No. 417 (1832), though Samouelle never described or mentioned any Pulex 

 vespertilionis. 



\ Pulex vespertilionis, Duges (nee Bouche). Ann. d. Scienc. Nat. vol. 

 xxvii. p. 161 (1832). 



