200 THE CANADIAN ENTOMOLOGIST. 



Hosts. — California ground squirrel, Citellus Beecheyi ; brown rat, Mus 



Nbrvegicus. 

 Regions. — Los Angeles and San Francisco Bay region. 



8. — Hoplopsyllus affinis, Baker.. 



1909. — Fox. Not published heretofore. To appear in Entomological News. 



Host. — Bachman brush hare, Lepus Bachmaui. 



Region. — San Francisco County. • 



Genus Ceratophyllus, Curtis. 



9. — Ceratophyllus acutus, Baker. 



1904. — Baker. Invert. Pacifica, I, p. 40. 



Hosts. — Sperinophilus sp.; California ground squirrel, Citellus Beecheyi ; 



nest of wood rat, Neotoma sp. 

 Regions. — Los Angeles, Palo Alto, San Francisco Bay region. 



10. — Ceratophyllus ignotus (Baker), Wagner. 



1908. — Mitzmain, Entom. News, XIX, p. 382. 



Hosts. — California pocket gopher, Themomys bottic ; California mole, 



Scapanus Cali/oruicus. 

 Region. — San Francisco Bay. 



11. — Ceratophyllus fliger, Fox. 



1908. — Fox, Entom. News, XIX, p. 434. 



1908. — Mitzmain, erroneously reported as abantis, ibid p. 382. 



Hosts. — Domestic fowl, Galltts domesticus ; nest of the sparrow, Passer 



domesticus ; man ; brown rat, Mus Norvegicus. 

 Region. — San Francisco Bay. 



1 2. — Ceratophyllus proximus, Baker. 



1904. — Proc. U. S. Nat. Mus., XXVII, pp. 412, 446. 



Host. — Ground squirrel, Citellus sp. 



Region — Southern California. 



13. — Ceratophyllus sexdeutatus, Baker. 

 1904. — Baker, Proc. U. S. Nat. Mus., XXVII, pp. 403, 446. 

 Host. — Taken from the nest and from the wood rat, Neotoma sp. 

 Regions — San Francisco County and Central California. 



14. — Ceratophyllus Cali/oruicus, Baker. 



1904. — Baker, Proc. U. S. Nat. Mus., XXVII, pp. 395, 440. 



Host. — Field mouse, Microtus Cali/oruicus. 



Region. — Central California. 



