226 THE ROYAL SOCIETY OF CANADA 



of cattle horses and dogs and occasionally on man. It has not been 

 recorded previously north of Oregon and Idaho. 



Family IXODIDAE 



Ixodes angustiis Neumann 

 Localities. 



Jeffrey, N. B. (Coll. C. H. McNutt, x-1908 from a mouse) 



Hadwen (1912) gives the following localities: Mount Lehman, 



B.C., Duncans, B.C. 

 Banks (1908) gives: Masset, B.C. (Coll. Keen). 

 Nuttall and Warburton (1911) give: Chilliwack, B.C. (Coll. iii- 

 1900). 

 Hosts. 



Mouse, 



Hadwen {I.e.) records the following hosts: Squirrels, Sciurus 

 douglasii and S.h. Vancouver ensis; rabbit (L. americanus) ; 

 rats and mice. 

 Nuttall and Warburton {I.e.) record a female from Tamias 

 townsendi, (Chilliwack, B.C.). 

 Life-History. 



This species was found by Hadwen to occur in all stages on 

 squirrels at Duncans, B.C. These animals appear to be infested 

 with about the same number of ticks throughout the year. During 

 1910 and 1911 he was able to study its life-history. The male and 

 female ticks were seldom found on the same host and Hadwen believes 

 that copulation takes place almost wholly in the squirrels' nests or 

 on the ground; the restricted movements of the host would not 

 render the latter situation impossible. The following is a summary 

 of Hadwen's observations: 



Gorged female: Average of 



Oviposition began at 16 days 



Larvae hatched at • •• • 73 „ 



Larvae fed on rabbit: 



Average time of feeding 2-5 „ 



Ecdysis, larvae issue as nymphs 61 » 



Nymphs fed on rabbit: 



Average time of feeding 2-5 „ 



Ecdysis, nymphs issue as adults 29 » 



Adults attach and remain for 7 ,, 



Allowance for hardening of skin after ecdysis and 



