No. 569] ECTOPARASITES OF MAMMALS 



275 



The chinchillas and vizcachas (family Chinchillidae, 

 or LagostomidsB) are represented in the host list by two 

 species, to which I can add another (perhaps two others) 

 on the basis of material recently received from Dr. C. H. 

 T. Townsend, of Pern. From Lagidium peruanum Gay 

 long ago described a peculiar Gyropus, and I have speci- 

 mens of a Gyropus which may or may not be different 

 from Gay's species. His description is very meager. In 

 addition I am about to describe, under the name Phllan- 

 dria toivnsendi, another species, representing also a new 

 genus, specimens of which have been sent me by Dr. 

 Townsend from the same host. Also in this Townsend 

 sending are specimens of a small Polyplax species (Ano- 

 pluran) from the same host. 



The Cercolabidaa or Coendidse, American porcupines, 

 are represented in the host lists by five species, three of 

 Central and South America and two of North America. 

 They harbor no Anoplura, but are parasitized by two 

 Mallopliau'uii species, of which one, Trichodectes setosus, 

 occurs on all the host species in the list. The second 

 Mallophagan is a Trichodectes recently described by 

 Stobhe from Cercolabes nova-hispanice of Mexico and 

 Central America. The other South American host porcu- 

 pines are Coendu (Cercolabes) prehensilis (northern 

 South America) and C. villosus (Brazil). The North 

 American hosts are Erethisson epixanthum (California) 

 and E. dorsatum (Nebraska). 



Finally the family Leporida>, hares and rabbits, ap- 

 pears in the host list with six (perhaps only five) repre- 

 sentatives, of which four, namely, Lepus timidus, of cir- 

 cumpolar arctic regions, Lepus cuuiculus, native to 

 Europe and north Africa but introduced over the whole 

 world, Lepus europceus of Europe and Lepus eanipestris 

 "J western Canada and United States, harbor the^ame 



hart's and rabbits. I must note that this species, Hcema- 



