Jan., '09] r,\TOMor.or;rrAi. NEWS. n 



Ceratophyllns londoniensis kothsch. 

 Host: Mus rattits. 



Ceratophyllus niger spec. nov. 



(Closely related to C. gallinae). 



JI't: Taken from an unused chicken yard and from spar- 

 row's nests. Occasionally found on Homo sap- 

 iens, Mus norvegicus. 



Ceratophyllus spec. nov. 

 Host : Mus norvegicus. 



Ceratophyllns spec. nov. 



Host : Microtus calif ornic us. 



Genus CTENOCEPHALDS Kolenati. 

 Ctenocephalus canis (Curtis) Baker. 



Host: Canis familiar is. Occasionally found on Homo sapiens 

 Mus norvegicus and Mus rattus. 



Ctenocephalus felis Rothsch. 



Host: Felis domestica. Occasionally found on Homo sapiens, 



Mus Norvegicus and once from Mephitis occi- 



dentalis. 



Genus HOPLOPSYLLOS Baker. 

 Hoplopsyllus anomalus Baker. 



Host Citellus beecheyi. Once taken from Mus norvegicus. 



Genus ODONTOPSYLLUS Baker. 

 Odontopsyllus charlottensis Baker. 



Host : Microtus calif ornicus. 



Genus CTENOPSYLLUS Kolenati. 

 Ctenopspllus musculi (Duges) \Vagner. 



Hosts: Mus norvegicus, Mus rattus, Mus musculus. Once 

 found on Microtus californicus. 



Genus HYSTRICHOPSYLLA Taschenberg. 

 Hystrichopsylla spec. nov. 



Host : Microtus Californicus. 



Genus CORYPSYLLA gen. nov. 

 Corypsylle ornatus spec. nov. 



Host : Scapanus Californicus. 



