SQUIRRELS OF MEXICO AND CENTRAL AMERICA 25 



and 3Iic)'osciufiis are South American groups with numerous 

 species, and occur as intrusive elements in Central America, 

 where each is represented by one or two species. Otosciurus 

 and Hester oschir lis have few species and belong to the western 

 United States, but cross the border into Mexico. 



The first name available for a subgenus of American Squirrels 

 is Gtterlingiietus Gray, 182 1, of which Macroxush a synonym. 

 Macroxtis, the name which has been commonly used, has been 

 curiously diverted from its original application to include nearly 

 all American squirrels. Lesson was the first to misuse the name, 

 after which Gray went to even greater extremes, in which he was, 

 to a certain extent, followed by Trouessart in 1897. In 1880 the 

 last named author estabhshed several subgenera of American 

 squirrels, several of which were accepted by Merriam and 

 Allen ; yet in 1897 he again lumped several of them in the 

 ancient confusion under Macroxus. The most recently described 

 subgenus is Microscmrus Allen, 1895. 



LIST OF SUBGENERA WITH TYPE SPECIES. 



Echinoscmrus^ type 5. hypopy rr hus W^-glcr (p. 25, 38). 

 Hesperosciurus^ type S. griseus Ord (p. 27, S3). 

 JVeoscitirus^^ type >5. caroUnensis Gmelin (p. 27). 

 Otosciurus^ type S. a^^r// Woodhouse (p. 28, 85). 

 Tatniasciurus^ type S. hudsonicus Erxleben (p. 28, 87). 

 Arccoscmrus^ type 6". oculatus Peters (p. 29, '^'$)). 

 Parasciurus, type S. 7iiger Linnaeus (p. 30, 97). 

 Gzierlinguetus^ type S. gtcei-linguet?is Gv^y (p. 30, 98). 

 Baiosciuriis, type S. deppeil^Qtexs (p. 31, loi). 

 Aficroscitirus, type S. alfar i AWen (p. 32, 105). 



Subgenus ECHINOSCIURUS Trouessart (p1. I, fig. 9). 



Echinosciurus Trouessart, Le Naturaliste, II, No. 37, Oct. 18S0, p. 



292; Cat. Mamm., Rodentia, pp. 80-81, 1880 (part). 

 J/a<:ro.Y«5 Trouessart, Catalogus Mammalium, nov. ed., II, pp. 421- 



429, 1897 (part). . ^^ • 



Type Sciurus hypopyrrhus Wagler, from Mexico. 



^Neosciuyus is included here in order to complete the revision of the sub- 

 genera of North American squirrels. 



