39 



zant of quite a number of still undescribed forms entitled 

 to recognition in nomenclature. Five admitted by Baird 

 in 1857, but later reduced to synonyms, have been rein- 

 stated as subspecies. The group is divisible into several 

 sections or subgenera, one of which (as already noticed) 

 has already been characterized by Mr. True (see antea, p. 

 31). Neither this nor some of the other leading types of 

 this group were represented in our leading museums by a 

 single specimen prior to 1885. They were thus not over- 

 looked by previous workers, but are genuine discoveries of 

 the present decade. 



The Sciuridae, or the Squirrels, Spermophiles and their 

 allies, present a nearly parallel case with the Muridae, but 

 only the genera Sciurus, Tamias and Spermophilns can be 

 noticed in the present connection. 



Of the genus Sciurus there were recognized in 1884, 13 

 species and 7 subspecies; in 1894, 18 species and 16 sub- 

 species. 1 



1 The additions from the United States are : 



Sciurus hudsonius nwgollonensis Mearns. 



Sciurus hudsonius vancouverensis Allen. 



Sciurus hudsonius calif ornicus Allen. (Perhaps = Sciurus botta Less. , 1832.) 



Sciurus carolinensis hypophceus Merriam. 



Sciurus niger limitis (Baird). Revived by Allen, Bull. Am. Mus Nat. Hist., 

 VI., p. 183, May, 1894. 



Sciurus fossor nigripes Bryant. 



Sciurus aberti concolor True, Proc. U. S. Nat. Mus., XVII., No. 999, 

 (advance sheet), April 26, 1894. Larimer Co., Colorado. 



Mexican and Central American additions are : 



Sciurus niger melanonotus Thomas, P. Z. S., 1890, p. 73, pi. vi. Jalapa, 

 Mexico. 



Sciurus apache Allen, Bull. Am. Mus. Nat Hist., V.. p. 29, March, 1893. 

 Northern Chihuahua. Mexico. 



Sciurus aberti durangi Thomas, Ann. & Mag. Nat. Hist., (6) XL, p. 50, 

 Jan., 1893. Cuidad, Durango, Mexico. 



Sciurus nayaritensis Allen, Bull. Am. Mus. Nat. Hist., III., p. vii., Feb., 

 1890=5. alstoni Allen (nee Anderson), ibid., II., p. 167, Oct., 1889. Zaca- 

 tecas Mexico. 



Sciurus cervicalis Allen, ibid., p. 183. Sierra Nevada de Colima, Jalisco, 

 Mexico. 



