1922] Swarth: Birds and Mammals of the Stikine Region 165 



A series of white-footed mice collected at and near Telegraph Creek 

 in 1902 has been reported upon by Allen (1903, p. 540) under the 

 name Peromyscus arcticus (Mearns) {^Peromyscus maniculatus 

 iorealis Mearns [1911, p. 102] ) . "What is undoubtedly the same series 

 of specimens is listed by Osgood (1909a,, p. 49) under Peromyscus 

 maniculatus arcticus (Mearns). Therefore, though this museum pos- 

 sesses no examples of Peromyscus maniculatus iorealis other than our 

 series from the Telegraph Creek region, I feel justified, on the grounds 

 above mentioned, in assuming this series to be representative of the 

 subspecies horealis. The chief interest attaching to the Telegraph 

 Creek form in the present connection lies in its relationship to the 

 subspecies" Perom/yscus m. macrorhinvws, from the region adjacent to 

 the mouth of the Stikine River. Of miocrorh/mus this museum pos- 

 sesses an abundant representation from various points in southeastern 

 Alaska. 



Before proceeding with a discussion of the specimens we collected, 

 certain features of the problem should be stated, in the interest of a 

 clear understanding of conditions. Osgood (1909a) in his comments 

 upon arcticus (= iorealis) and macrorhinus makes no direct compari- 

 son between the two ; at that time there were no specimens extant to 

 show that these forms came together at any point. From his "key" 

 and descriptions, however, certain contrasting characters of these sub-_ 

 species may be summarized as follows : 



Perom/yscus m. mMcrorhinus. General size larger ; hind foot, 24 to 

 25 mm. Tail longer than head and body ; usually more than 90, often 

 more than 100 mm. Coloration darker. 



Peromyscus m. iorealis. General size smaller; hind foot, 19 to 21 

 mm. Tail about equal to or shorter than head and body ; usually less 

 than 90 mm. Coloration paler. 



On the Alaskan coast just north of the habitat of macrorhinus is 

 the subspecies hylaeus. Between hylaeus and iorealis, in the region 

 north of Telegraph Creek, is the subspecies algidus, "the interior rep- 

 resentative of the dark coast form hylaeus" (Osgood, 1909a, p. 56). 

 According to Osgood {loc. cit.), algidus and iorealis occur together in 

 places within the general range of the former, and maintain their dis- 

 tinctness. Algidus, compared with iorealis, is a long-tailed form ; it 

 differs from the latter in this respect just as macrorhinus does. Allen 

 (1903, p. 544) records as Peromyscus oreas a single mouse taken in 

 the Cheonnee Mountains (near Telegraph Creek), where iorealis also 

 was secured. This same specimen, presumably, is recorded by Osgood 

 {loc. cit.) as algidus. The Cheonnee Mountains are a short distance 



