1902.] NATURAL SCIENCES OF PHILADELPHIA. 451 



brown. Under parts similar to upper parts, but darker aud more 

 brownish on chest." This description is taken from a lighter indi- 

 vidual Avith more ochraceous cast than the average. Several of the 

 Peel's river specimens have scarcely any ochraceous cast, but rather 

 a drab-brown tinge ; but even in these the grayness and clearness of 

 the brown from the " canary " shade of typical southern ameri- 

 cana is very noticeable. For a fuller discussion of these differences 

 see under 31. americana brumalis above, where the cranial charac- 

 ters of both forms are also discussed at length. Also, see remarks 

 under M. americana tyjncus. 



Measurements. — Avei-age of tight selected old adults, males, 

 measured in flesh : Total length, 671 mm. ; tail vertebrse, 204 mm. ; 

 hind-foot, 109 mm. ; ear height, 40 mm. Skull measurements 

 (average of six adult males) : Basilar length, 80 mm. ; interorbital 

 constriction, 16 mm.; zygomatic expansion, 51 mm. In the type 

 of actuosa the occipito-nasal length is given by Osgood as 85 mm., 

 and tlie zygomatic expansion 55 mm. This is larger than any of 

 the rest of the large series belonging to the U. S. National Museum. 

 Mustela americana abietinoides (Gray). British Columbia Marten. 



I860. [Maries (unericann'\ var. 1, abietinoides Gray, Proc. Zool. Soc, 

 Loudon, p. 106. 



Type Locality. — " Rocky Mountains (Drummond and Lord)," 

 Gray. As Gray's abietinoides thus included two distinct species, 

 one of which was undoubtedly caurina (collected by Lord), I have 

 now restricted it to the Rocky mountain specimens taken by Drum- 

 mond. Drummoud's itinerary, as given by Richardson {Fauna 

 Boreali Americana, Vol. I, p. xvi), shows that he did not collect 

 specimens west of the Selkirk Range, hence not within the range 

 of eaurina. The description of abietinoides by Gray evidently 

 refers to dark specimens characteristic of the humid environment of 

 the Selkirks, into which Drunnnond says he penetrated just before 

 his recall home. The marten of the main arid chain of the 

 Rockies is evidently a lighter colored animal. On these considera- 

 tions I have seen fit to define the restricted type locality of abieti- 

 noides to the edge of the humid western slope of the Rocky moun- 

 tains, somewhere between Kicking Plorse pass and the Columbia 

 river. It is significant that this is also the eastern limit of the 

 "Abies" mertensiana or AVestern hemlock, .after which CJray 

 named his so-called "variety" abietcnoides, pioba])ly on account 



