1912] Swarth: Birds and Mammals from Vancouver Island 95 



which we were camped, and a number were caught in traps, 

 many of them early in the evening, long before dark. 



At Errington they were abundant in the grain fields, and I 

 saw many of their burrows in the walls of the drainage ditches, 

 but I was told that in the winter much of this land was flooded, 

 or so saturated with water that the rats were all driven to higher 

 ground. 



Two specimens were preserved (nos. 12447. 1244S). an adult 

 male and female, collected at the Tahsis Canal, July 27. 



Peromyscus maniculatus austerus (Baird) 

 Puget Sound White-footed Mouse 



Very abundant almost everywhere; in fact, the majority of 

 specimens secured were trapped in self-defense in and about our 

 various camps. During the month spent at Beaver Creek three «-> 

 or four mice were caught every night in the tent where the 

 provisions were kept. Most of those taken at Nootka Sound 

 were trapped in the cabin, and at Central Lake twenty-three 

 were caught in two nights in the cabin we occupied. 



Two hundred and three specimens were preserved (nos. 

 12112-12309. 12597-12601), 198 as skins, and five in alcohol, 

 from Vancouver, Nanaimo. Parksville, Little Qualicum River, 

 French Creek, Errington, Alberni, Golden Eagle Basin, Tahsis 

 Canal, and Friendly Cove. 



The Nootka Sound specimens are appreciably larger than 

 those from the east side of the island. Comparative measure- 

 ments are as follows : average of nine adults from Tahsis Canal 

 and Friendly Cove, length 191.8, tail 103.3, hind foot 22.6; 

 average of nine adults from the vicinity of Parksville : length 

 187.4. tail 84.1, hind foot 20.6. 



Evotomys caurinus Bailey 

 Northwestern Red-backed Mouse 

 An adult female of this species was trapped by Miss Alex- 

 ander on the outskirts of the city of Vancouver, on the mainland 

 of British Columbia, on April 22 (no. 12310). It measures as 

 follows: length 136, tail 34. hind foot 18. 



