5S [March, 



cat (Felis silvestris), and rarely ou the cormorant (Phalacrocorax 

 carho). 



VI. Genus: ORNITHOPSYLLA Baths . (1908). 



Labial palpns of four sec^ments. Frons with tubercle. Incrassa- 

 tion of head from auteunal groove upwards present. Genal and 

 prothoracic combs absent. 



One species. 



7. Ornithopsylla laetitiab Boths. (1908). 

 (Figs. 7, 8). 



A small pale species. Hindfemur without tooth on ventral edge. 

 The patch of spines on inside of hindcoxa as pale as the bristles. 

 Bristles at the posterior edge of the tibiae very short and dark. 



(^ . Clasper (fig. 8) with a large hairy flap which bears two spines 

 at the apex, on the inside of this flap another smaller flap and two 

 slender processes. Manubrium very broad and abruptly curved 

 upwards. 



^ . Seventh abdominal sternite sinuate ; bristles on eighth 

 tergite very numerous. Head of receptaculum seminis slightly longer 

 than broad, gi'adually merging into the tail, which is about twice as 

 long as the head. 



Only recorded from the Scilly Islands, where it frequents the 

 nests of sea-birds. The real host is probably the Manx shearwater, 

 Puffi.nus anglorum. Not yet observed on the Continent. 



B. Family : Cbratophyllidae. 



Eye generally well developed, sometimes vestigial. Antennal 

 groove generally open, but entirely closed in females of blind forms. 

 Labial palpi with five segments, apex symmetrical (fig. 40). Some of 

 the abdominal segments with short apical spines, central abdominal 

 segments with at least two rows of bristles. First midtarsal segment 

 about as long as second. Hindcoxa ivitJiout a patch of spines on the 

 inner side except in Blmdinopsylla. 



C- Subfamily: Ceratophyllinae. 



Eye well developed. Antennal groove widely open in both sexes. 

 No genal spines {cf. fig. 13). 



