135 



Genus HYSTRICHOPSYLLA Taschenberg. 



20. Hystriclopsylla tripectinata Tiraboschj.— Reported by Tira- 

 boschi from Mu&. musculus in Italy. 



Genus CTENOPTHALMUS Kolenati. 



21. Ctenopthalmus agyrUs Heller.— Taken oflf Mus Norwegicus in 

 England. 



The results of the identification of 19,768 fleas in San Francisco and Oakland, Cal. 



SAN FRANCISCO, 1908. 

 Host: Mus NOEVEGicns. 



Host: Mus RATTUS. 



Host: Mus MUSCULUS. 



OAKLAND, CAL, 1909. 



Host: Mus NOEVEGICUS. 



Host: Mus ALEXANDBINUS. 



April. 



000000 



