F. C. Bishopp and H. P. Wood 
161 
Fig. 1. Map showing the distribution of Dermacentor albipictus and Dermacentor nigro¬ 
lineatus in the United States. 
Black dots indicate the localities in which D. albipictus has been collected during 
this investigation. 
Small circles show records by other investigators of the occurrence of D. albipictus. 
Small points indicate the probable normal distribution of T). albipictus in the 
United States. 
x marks indicate the localities in which specimens of D. nigrolineatus have been 
collected during this investigation. 
+ marks indicate localities where D. nigrolineatus has been collected by other 
investigators. 
Dermacentor albipictus 1 Packard. 
Distribution. 
Banks reports 2 having seen specimens of this species from the 
Adirondack Mountains, New York; Michigan; Nebraska; Montana; 
Bear, Idaho; Nevada and Pullman, Washington. The types are from 
Nova Scotia, Canada. Stiles records 3 specimens from Blue Mountain, 
New Hampshire. If we consider D. salmoni Stiles as belonging to this 
species, his records 4 of a collection in Oklahoma, one from Nashville, 
Tennessee, and one from Montana should be included. We are inclined 
to the belief that the ticks collected in Oklahoma and Nashville, 
Tennessee, were imported on hosts into these localities and are not to 
be found normally in these districts. This is probably true also of the 
record from Nebraska. A good example of how this tick may be 
accidentally introduced into a locality or collected on transient animals 
has recently come to our attention. Specimens were collected on cattle 
at Fort Worth, Texas, by Dr Irwin Owens. These cattle were shipped 
from Marathon, Texas, a distance of over 600 miles. Hall 5 has reported 
two collections of ticks, which are probably this species, taken in eastern 
Colorado. 
During our investigations a fairly accurate knowledge of the dis¬ 
tribution of this tick in the Western States has been obtained. The 
1 The common names of “Moose tick” and “Elk tick” have been applied to this 
species. As these names are but little used, and we believe a more distinctive name 
should be applied, we suggest “Winter tick” as a common name. 
2 “A revision of the Ixodoidea of the United States.” Tech. Ser. Bur. of Ent., 
U.S. Dept. Agr., Bull. 15, p. 44. 1908. 
3 “ The taxonomic value of the microscopic structure of the stigmal plates in the tick 
genus Dermacentor.” U.S. Pub. Health and Mar. Hosp. Service, Hygienic Lab. 1910, 
Bull. 62, p. 63. 
4 Ibid. pp. 57-60. 
8 “ The parasitic fauna of Colorado.” Colorado College Pubs. Sci. Ser. Yol. xir. No. 10, 
p. 366. 
