390 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxvii 



and the lateral portion.s of the ninth with about a dozen .stout bristles. 

 Middle alxlominal sternites each with a transverse row of six to eight 

 bristles. 



The hind tibiae are stout and heavih" bristled. Second joint of hind 

 tarsi with one apical spine about equaling joint III. Hind femora 

 with several bristles on lower margin proximally, three on lower 

 margin distall}", but only two minute bristles on side. Hind cox^e 

 unusually heavily clothed with stiff bristles on outside anterior half; 

 inside and below are several close-set irregular rows of numerous 

 minute teeth. 



Upper claspers nearly quadrangular, attached by one corner, the 

 hind margin with a few weak hairs. 



Length, 3.. 5 mm. Color, clear brown. 



CERATOPHYLLUS DENTATUS, new species. 



The single male specimen of this species in the collection was sent 

 from Moscow, Idaho, by Prof. J. M. Aldrich, who found it on Lynx 

 cmiadensis, associated with considerable numbers of another species. 

 I regard this occurrence as purely accidental, and should not be sur- 

 prised to learn eventuall}^ that its proper host was some species of 

 Zepus, as its real affinities are with /nultispinosus and the other rabbit 

 fleas. 



This species is a ver}^ near relative of //lultisphio.sui^, with distinguish- 

 ing characters as follows: The pronotal ctenidium consists of about 26 

 close-set spines. The mandibles extend to about four-fifths the length 

 of anterior coxa?. On each side of the vertex there are more than 3 

 spines. The black teeth on the abdominal tergites occur in pairs, one 

 pair on each side near the dorsal line. The male claspers are twice 

 longer than wide, narrowed on apical half below to a truncate apex; 

 the margin with a number of scattering bi-istles and minute, weak 

 hairs. One of the apical spines on joint II of hind tarsi is nearly as 

 long as joints III and IV together. The minute teeth on inside of hind 

 coxffi are even more numerous than in multlspmosus. 



Length, 3.5 mm. Color, rich brown. 



Ti/2)e.^Q^t. No. 6900, U.S.N.M. 



CERATOPHYLLUS CHARLOTTENSIS Baker. 



mate XIJ, tigs. 6-10. 



The Rev. J. H. Keen found this species in a mouse nest at Masset, 

 Queen Charlotte Islands, and I described it as a Typhlopsylla on 

 account of the I'educed eyes. It possesses several remarkable charac- 

 ters not mentioned in the meager original description. It has the 

 typical form of body of a Ceratoph3'llus. The spines of last tarsal 

 joint on fore and middle legs are arranged as in Ctenopldludinm^ thosa 



