March, '09! 



ENTOMOLOGICAL NEWS. 



107 



A New Species of Ceratophyllus 



A GENUS OF THE SIPHONAPTERA. 



BY PASSED ASSISTANT SURGEON CARROLL Fox, P. H. & M. H. 

 S., San Francisco, California. 



Ceratophyllus mnltidentatus spec. nov. 



Seven specimens in all, two females and four males from 

 Microtus calif ornicus, one female from the nest of the wood 

 rat (Xeotoiiia). Mr. Rothschild kindly examined these fleas 

 for me and believes them to be a new species. 



FEMALE. Head gently and evenly rounded from posterior border to 

 the anterior ventral angle. Frontal notch very low down. Eye present, 

 lower margin straight. Gena acutely pointed posteriorly, its lower edge 

 curving strongly upward anteriorly. Maxilla triangular, acute at apex. 



Head of male. 



Genitalia of female. 



Maxillary palpi reaching the middle of trochanters. Length of joints 

 12-14-11 and 15. Labial palpi including undivided basal portion, seven 

 jointed, and reach to end of trochanters. Three rows of bristles on the 

 genae. The lower row of three stout bristles the innermost placed 

 above the eye, a middle row of four smaller and an upper row of six 

 still smaller bristles. The usual number of bristles on the hind mar- 

 gin of the head, with two, a large and a small, at the posterior lower 

 angle. Besides this apical row, there are on the occiput, three oblique 

 rows of bristles, the posterior and middle row each consisting of six 



