186 University of California Publications in Zoology [Vol. 24 



mens were taken at various points between that town and the Summit, 

 twelve miles to the northward. Six specimens from Telegraph Creek 

 were submitted to Mr. E. A. Preble, of the United States Biological 

 Survey, for subspecific determination. His conclusion is that these 

 squirrels are ' ' virtually identical with Sciurus h. hudsonicus. In some 

 respects, notably in the color of the back, they show some slight ap- 

 proach to ;S'. h. petulaTis of the coast. They agree, however, with 

 hudsonicus as regards the color of the fringe of the tail. ' ' The Glenora 

 and Doch-da-on Creek specimens are clearly in the same category as 

 the Telegraph Creek specimens; they are all S. h. hudsonicus. The 

 squirrels from Flood Glacier, Great Glacier, and Sergief Island are 

 just as unequivocally S. h. picatus. 



As between hudsonicus and picatus, there are differences of color 

 and of the skull. Bed squirrels from Doch-da-on Creek (three full- 

 grown young) are in both respects typical of hudsonicus and they rep- 

 resent the farthest point down stream at which this subspecies was 

 taken. Our next collecting station was Flood Glacier, some forty miles 

 down the river, and, as noted, there was taken at that point but the 

 one red squirrel, typical of picatus, both as regards color, and skull. 

 Whether there actually is a stretch of country in this intermediate 

 region where red squirrels are as scarce eis our experience seems 

 to indicate, or whether we were merely unlucky in the necessarily 

 limited areas our field work covered at Flood Glacier and Great Glacier, 

 remains still to be determined. It may be, of course, that there is 

 actually a notable scarcity of the animals throughout this intermediate 

 region, that there is some attribute of the country that is unfavorable 

 to the red squirrel, and hence ^rves to keep apart these two subspecies. 

 (For the use of the name Sciurus hudsonicus picatus see Swarth, 

 1921&, p. 92.) 



"We gained but little information regarding the life history of the 

 red squirrel in the region explored. Near the Junction individuals 

 were several times seen to enter holes in the ground, holes that, from 

 their appearance, evidently served as homes. Squirrel nests were- 

 sometimes seen in the trees, but they were not numerous. Females 

 collected May 25 and 26 contained embryos, four and five in number, 

 and about 30 millimeters long. A young male shot at Glenora, July 2, 

 is about two-thirds the length of an adult, and about a quarter the 

 weight. The three young ones from Doch-da-on Creek, taken July 14, 

 17, and 22, respectively, are nearly full-grown, being but slightly 

 below adults in measurements and weight. 



