135 



Genus HYSTRICHOPSYLLA Taschenberg. 



20. HystricJwpsylla tripectinata Tiraboschi. Reported by Tira- 

 boschi from Mus musculus in Italy. 



Genus CTENOPTHALMUS Kolenati. 



21. Ctenopihalmus agyrtes Heller. -Taken off Mus Norwegicus in 

 England. 



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



SAN FRANCISCO, 1908. 

 Host: Mus NORVEGICUS. 



