38 NELSON 



SYSTEMATIC DESCRIPTIONS OF SPECIES.' 

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

 SCIURUS AUREOGASTER F. Cuvier. Red-bellied Squirrel. 



Sciurus «/f^r Erxleben, Syst. Regni Anim., pp. 417-418, 1777 (part: the 

 melanistic form — Sciurus 7nexicanus or Quautechallotlthliltic of Hernan- 

 dez, p. 582. Not S. niger Linn., 1758.) 



Sciurus variegatus Desmarest, Nouv. Diet. d'Hist. Nat., x, pp. 103-104, 1817 

 (part); Saussure, Revue et Mag. de Zool., pp. 4, 5, 1861 ; Alston, 

 Proc. Zool. Soc. London, pp. 660-662, 1878 (part) ; Biol. Cent. -Am., 

 Mamm., pp. 127-128, 1880 (part: specimens from Orizaba, Cordova, 

 Mirador, Santuario and Jalapa, Vera Cruz) ; Sumichrast, La Naturaleza, 

 V, p. 324, 1882 (part : specimens from central Vera Cruz) ; Thomas, Proc. 

 Zool. Soc. London, p. 74, 1890, (Not S. variegatus Erxleben 1777.) 



Sciurus aureogaster F. Cuvier, Hist. Nat. Mammiferes, vi, livr. Lix, pi. with 

 text, 1829; Bachman, Proc. Zool. Soc. London, pp. 88-89, 1838; I. 

 Geoffroy, Voyage de la Venus, Zool., Atlas, pi. 11, 1846 ; text, pp. 156- 

 163, 1855 (part : specimens described with rufous lower surface) ; Baird, 

 Mamm. N. Am., p. 282, 1857; Allen, Bull. Am. Mus. Nat. Hist., N. 

 Y., Ill, pp. 181-182, 1890 (part: specimens from Tampico) ; Ibid., iii, 

 p. 222, 1 891 (part : specimens from Valles, San Luis Potosi, and Tampico, 

 Tamaulipas. 



Sciurus rafiventer Lichtenstein, Abhandl. K. Akad. Wiss. Berlin, p. 116 

 (1827), 1830. 



Sciurus leucogaster Y . Cuvier, Suppl. d'Hist. Nat. Buffon, I, pp. 300-301, 



1831. 

 Sciurus mustelinus Audubon and Bachman, Proc. Acad. Nat. Sci. Phila., 



pp. loo-ioi, 1841 (melanistic) ; Journ. Acad. Nat. Sci. Phila., viil, pt. 2, 



p. 312, 1842 ; Quad. N. Am., iii, pp. 258-259, pi. CLii, 1851. '" 



Sciurus ferruginiveiiiris Audubon and Bachman, Proc. Acad. Nat. Sci. 



Phila., p. loi, 1841 ; Journ. Acad. Nat. Sci. Phila., viii, pt. 2, p. 313, 



1842 ; Quad. N. Am., I, pp. 292-293, pi. xxxviii, 185 i. 

 Sciurus ferrugineiventr is Schinz, Synopsis Mamm., 11, p. 14, 1845. 

 Sciurus aurogasiar AvDVBO^ and Bachman, Quad. N. Am., ill, p. 344, 1851. 

 Sciurus hypoxanthus (Lichtenstein MS) I. Geoffroy, Voyage de la Venus, 



Zool. (text), pp. 158-159, 1855 (on labels of squirrels from BerHn Museum). 

 Sciurtis chrysogaster Q\YJe>^\., Saugethiere, p. 650 footnote, 1855. 

 Macroxus aureogaster Gray, Ann. and Mag. Nat. Hist., 3d ser., xx, 423, 



1867 (var. 2 from Mexico). 

 Sciurus aiireigaster KxAJE.^, Mon. N. Am. Rodentia, pp. 75f>-753. ^"^11 (part: 



specimens from Orizaba, Cordova, and Mirador, Vera Cruz); Bull. U. S. 



Geol. Survey Terr., iv, pp. 882-883, 1878. 

 Sciurus hypopyrrhus Allen, Bull. Am. Mus. Nat. Hist., N. Y., iii, pp. 



222-223, 1891. (Melanistic specimens from Tampico, Mexico.) 

 Sciurus leucops Allen, Bull. Am Mus. Nat. Hist., N. Y., ix, p. 198, 1897. 



Type locality. — ' California ' — really eastern Mexico. Specimens 

 from Alta Mira, Tamaulipas are typical. Type in Paris Museum.? 



lAll measurements are in millimeters ; specimens measured in the flesh 

 unless otherwise stated. The basal length of the skull is measured from gna- 

 thion to basion.the palatal length from Henselion (posterior alveolus of incisor) 

 to palatal notch. 



