No. 569] ECTOPARASITES OF MAMMALS 273 



Africa, Hesperomys leucopus of North America, Epimys 

 aurifer of the Malay Peninsula, Gerbellus indicus of 

 northern India and Afghanistan, and Holochilus sciureus 

 of Brazil and Peru. The common Old World mouse, Mus 

 minutus, harbors three Anopluran species, while Mus 

 musculus has but two. The Old World water vole, Micro- 

 tias terrestris, has a parasite differing from the two in- 

 festing respectively the two Old World land species of 

 Microtus. 



In connection with this resume of the Murid parasito, 

 I may say that I have now in process of working over 

 some two hundred vials of material collected last summer 

 from California mammals, which is going to add many 

 records to the Murid list of both hosts and parasites. It 

 will also add numerous records for the squirrels and 

 spermophiles (Seiuridae). 



The family Geomyidae, gophers, is represented in the 

 host list by three North American and one Central Amer- 

 ican species. The Mallophagan species Tricliodectes 

 geomydis occurs on all of these hosts. The North Amer- 

 ican hosts are Geomys bursarius (Iowa), Thomomys 

 botta (California), Thomomys bulbivorous (California), 

 and the one Central American host is Mavrotowys hetcro- 

 dus (Costa Rica). T. bulbivorous may be a synonym of 

 T. bottce. In addition, Geomys bursarius has yielded an 

 Anopluran species of genus and species peculiar to it. 



The pocket rats, family Heteromyidae, are represented 

 by a species of Perognathus (Baja California), and 

 Dipodomys merriami (Arizona). From both are re- 

 corded the same Mallophagan species, Tricliodectes 

 calif ornicus. 



The jerboa, Dipus sp., is the sole representative of the 

 family Dipodidae. From it is recorded an Anopluran 

 species taken in Tunis. 



The Octodontida? are represented by three species 

 parasitized by one Anopluran and three different Mallo- 

 Phaga. The three hosts are of three different genera, one 

 with an African range, the other two of South America. 

 The parasite species on each is peculiar to it. A third 



