THE CANADIAN ENTOMOLOGIST. 201 



15. — Ceratophyllus ciliatus, Baker. 



1904. — Baker, Proc. U. S. Nat. Mus., XXVII, pp. 397, 441. 



Host, — Chipmunk, Eutamias sp. 



Region. — Central California. 



1 6. — Ceratophyllus fasciaius, Bosc. 



1907. — Mitzmain, Bull. Cal. State Board of Health, III, p. 39. 



Hosts. — House mouse, Mus musculus; brown rat, Mus Norvegicus ; black 



rat, Mus rattus; man; California skunk, Mephitis Occident alis ; 



California pocket gopher, Thomomys bottce. 



17. — Ceratophyllus Londoniensis, Roth. 

 1909. — Fox, Entom. News, XX, p. 11. 

 Host. — Black rat, Mus rattus. 

 Region. — San Francisco County. 



18. — Ceratophyllus telchinum, Roth. 

 1909. — Fox, Entom. News, XX, p. 10. 

 Host.— Field mouse, Microtus Califomicus. 

 Region. — San Francisco County. 



19. — Ceratophyllus multidentatus, Fox. 



1909. — Fox. Unpublished. To appear in early number of Entom. News. 



Host. — Field mouse, Microtus Califomicus. 



Region. — San Francisco County. 



20. — Ceratophyllus, spec, nov., Fox. 

 1909. — Fox. Unpublished. To appear shortly. 

 Host.— California weasel, Putorius xanthogenys. 

 Region. — San Francisco County. 



21. — Ceratophyllus Wagner i, Baker. 

 1909. — Fox. Heretofore unrecorded. 

 Host. — Weasel, Putorius xanthogenys. 

 Region. — San Francisco County. 



22. — Ceratophyllus anisus, Roth. 



1909. — Fox. Reported in a private communication ; has not appeared 



in American literature. 

 Host. — Brown rat, Mus Norvegicus. 

 Region. — San Francisco County. 



