204 Merriam The Chipmunks of the Genus Eutamias. 



his revision of the group, large series of specimens are now before 

 me from the three localities involved, namely, Nevada City, 

 Michigan Bluff (the type locality of quadrimaeulatns), and Blue 

 Canon (the type locality of macrorhabdotes). The Nevada City 

 specimens alone are sufficient to settle the question. Some of 

 them have just attained the post-breeding or summer pelage; 

 others are in the worn breeding pelage, and others still are im 

 mature. Those in the fresh summer pelage agree with the speci 

 men above described from the same locality, except that the ears 

 and post-auricular spots are decidedly larger. Specimens in 

 worn breeding pelage, however, are quite different, having merely 

 a suspicion of the rich rusty color on the back and shoulders, 

 and the rusty of the hind feet much less pronounced. These 

 specimens, in fact, agree with specimens of macrorhabdotes from 

 Blue Canon in corresponding pelage. Furthermore, to put the 

 matter beyond dispute, a series of specimens was obtained by 

 the expedition from Michigan Bluff, the actual type locality of 

 Gray's quadrimaculatus. They were collected in the latter part 

 of October by Mr. Vernon Bailey, and agree in every particular 

 with October specimens from Blue Canon, the type locality of 

 macrorhabdotes. They agree also with the Nevada City specimens 

 in breeding pelage, except that the colors are a little deeper, the 

 coat being new instead of worn. It is obvious, therefore, that 

 quadrimaadatus Gray and macrorhabdotes Merriam are one and 

 the same animal the former in summer, the latter in fall pelage.* 

 The much greater development of ferruginous on the original 

 Nevada City specimen and on the additional specimens in sum 

 mer pelage more recently obtained from the same locality is 

 purely a seasonal character, pertaining to the short-lived sum 

 mer pelage. The October specimens of 'macrorhabdotes^ then 

 available for comparison were believed by both Doctor Allen and 

 myself to be in the post-breeding or summer pelage, and there 

 fore strictly comparable with the Nevada City specimen the late 

 fall or winter pelage not having been recognized at that time in 

 this or any other species of the genus. 



* Doctor Allen states that he was at first inclined to regard the two as 

 identical, and Mr. Oldfield Thomas, Curator of Mammals in the British 

 Museum, who compared a Blue Canon specimen with Gray's type, wrote 

 on the back of the label : " Certainly identical with the type of T. quadri 

 maculatus Gr., which only differs by more yellowish and less sharply de 

 fined underside and more fulvous tianks and shoulders." Bull. Am. Mus. 

 Nat. Hist., Ill, June, 1890, 82. 



