\ 



100 Psyche [August 



murus (Santa Catalina Mts., Ariz.) and Citellus plesius ablusus 

 (Prince William Sound, Alaska). The specimens from Marmota 

 are somewhat larger than those from any of the numerous other 

 hosts and there are slight differences in the shape of the sternal 

 plate but there seem to be no good grounds for regarding this form 

 as at all specifically or varietally distinct. Host of the type, 

 Sciurus cinereus. 



Linognathoides inornatus Kellogg & Ferris. 



From Neotoma cinerea cinerea and N. fuscipes streatori (Yo- 

 semite National Park, Calif.). This species was referred to Lin- 

 ognathoides because of the entire absence of chitinized tergal and 

 sternal plates but the specimens obtained from Neotoma fuscipes 

 have the anterior division of each tergite and sternite distinctly 

 chitinized although in all other respects they agree entirely with 

 the specimens from N. cinerea. It may be that this form should be 

 separated as a new species but I have not sufficient material to 

 justify me in doing so. It is evidently rather uncommon in its 

 occurrence for it has been found on but one individual out of 

 dozens examined while the form occurring upon A^. cinerea is 

 present upon practically every individual of its host species. 



Neohaematopinus pacificus Kellogg & Ferris. 



From Eutamias alpinus and Eutamias speciosus frater (Yosemite 

 National Park, Calif.) and Eutamias merriami pricei (Stanford 

 University, Calif.). 



Host of the type, Eutamias townsendi ochrogenys (Cazadero, 

 Sonoma Co., Calif.). 



Neohaematopinus antennatus Osborn, var. semifasciatus var. nov. 



From Sciurus douglasi mollipilosus (Cazadero and Freestone, 

 Sonoma Co., Calif.) and Sciurus douglasi albolimbatus (Yosemite 

 National Park, Calif.). In the "Anoplura and Mallophaga of 

 North American Mammals" this form was included with A^. 

 antennatus Osborn, but it should be separated as at least varietally 

 distinct. It differs constantly from N. antennatus in having 

 the anterior division of each abdominal tergite and sternite dis- 

 tinctly chitinized but resembles N. antennatus in all other respects. 

 A^. pacificus K. & F., which also has the anterior division of the 



