MAMMALS OF Till'. MEXICAN I'.OT N DA II V. 



309 



Measurements of S3 specimens of the Ammospermophilus harrisii group — Continued. 



Museum Dum- 

 ber. 



69878 



59866 

 59872 

 .v.'*-:;; 

 59877 

 59876 

 59869 

 59879 

 59880 



59878 



59866 

 59872 

 59873 

 59877 

 59876 

 59869 



2977 



2978 

 2979 

 2980 

 2981 

 2982 

 62983 

 2997 

 2998 



Locality. 



AmmosjH rmophilus harrisii sax- 

 icola — Continued. 



Tinajas Altas, Yuma County, 



Arizona. 



do 



do 



do 



....do 



....do 



....do 



....do 



....do 



Date. 



1894. 

 Feb 16 



...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 ...do... 

 Feb. 19 

 ...do... 



_ X 



— — 



« B9 



mm. 

 1.7 



5 

 5 

 4.9 



a Mammas, five pairs. 

 '•Type. 



cContained six large fetuses; preserved in alcohol. No. 61527, D.S.N.M., body with six fetuses; 

 preserved in alcohol. 



Genus CALLOSPERMOPHILUS Merriam (1897). 



Callosptrmophilus Merriam, Proc. Biol. Sue. Washington, XI, p. 189, July 1, 

 1S97, footnote ("and lateralis is the type of a very distinct subgenus of Spt r- 

 mophUus, which I here name Callospermophilus ,, )\ XIV, p. 126, July 19, 

 1901; Proc. Washington Acad. Sci., Ill, p. 563, Nov. 29, 1901.— Miller and 

 Rehx, Proc. Bost. Soc. Nat, Hist., XXX, No. 1, Dec. 27, 1901, p. 46, foot- 

 note (Syst. Results Study N. Am. Mam. to close of 1900); XXXI, Aug. 27, 

 1903, p. 75 (Syst. Results Study N. Am. Mam. during the years 1901 and 

 1902).— Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 82. fig. 17 (skull of 

 type); IV, 1904, p. 147 (Mam. Mid. Am.). 



Characters. — Body with three longitudinal stripes (one whitish and 

 two black) on each side; a golden mantle over head and shoulders; 

 mamma*. 5 pairs (in one specimen of C lateralis^ 4 pairs); tail cylin- 

 drical, hairy; external ears developed to a degree intermediate between 

 those of Ammospermophilus and Eutamias; skull very similar to that 

 of Citelluscitettus(Limn8e>\is), much broader than in Ammospermophilus 

 or Eutamias, with relatively shorter rostrum, broader nasals, longer 

 interpterygoid fossa, and broader basioccipital; skull highest opposite 

 tips of postorbital processes; first premolar smaller than in C. citellus, 

 hut relatively larger than in Ammospermophilus or Eutamias. 



CALLOSPERMOPHILUS LATERALIS (Say). 

 SAY GROUND-SQUIRREL. 



Sciurus hit, mils Say, Long's Bxpedition to the Rocky Mountains, II. 1823, p. 46. 



i i >ri<_ r iiial description |. 

 Arctomys {Spermophilus) lateralis, Richardson, Zool. Journ., III. April, l^- N . 



p. 519; Fauna Boreali-Americana, I. 1829, p. 174, pi. kiii. 



