210 Field Columbian Museum — Zoology, Vol. III. 



came before 9:30 A. M. or later than 2:30 P. M., most coming down 

 between 12:00 M. and 1:00 P.M. This habit has probably been 

 established to avoid lions, which are seldom about during the hottest 

 part of the day. A few ewes were seen with two lambs, but the 

 greater number had only one. Most of the young appeared about 

 two months old. Their usual gait was a short gallop, seldom a 

 walk or trot." 



ORDER RODENTIA. 



FAM. SCIURID/E. 



SCIURUS. 



Sciurus douglasi mearnsi. 



Sciurus douglasi mearnsi. Towns. Proc. Biol. Soc, Wash., 1897, 

 p. 146. 



6 Specimens: 4 Vallecitos; 2 La Grulla, San Pedro Martir Mts., 

 9,000 feet elevation. 



TAMIAS. 

 Tamias obscurus. 



Tamias obscurus. Allen. Bull. Am. Mus. Nat. Hist., 1890, p. 70. 



38 Examples: 1 Aguaji de las Fresas; 11 La Grulla; 13 St. Eula- 

 lia; 7 Vallecitos; 2 Rosarito; 1 Santa Rosa; San Pedro Martir Moun- 

 tains; 3 Hanson Lagoon, Hanson Laguna Mountains. 



Most of these specimens are in post-breeding pelage, and have a 

 very different appearance from the type described by Dr. Allen, 

 which is in winter pelage and resembles the three examples from 

 Hanson Lagoon. The post-breeding pelage is very bright, the five 

 dark dorsal streaks being very conspicuous, and of a bright chestnut 

 color, the central one being black on lower half. The four gray 

 dorsal streaks are also strongly accentuated and the flanks are tawny 

 ochraceous or ochraceous rufus. Altogether it is a very different 

 looking animal in the August and September dress from that in 

 which it is clothed in May and November. This species is a dweller 

 of high elevations, its lower limit being about the level of the "east- 

 ern edge of the Alamo plain." 



CITELLUS. 

 Citellus leucurus. 



Tamias leucurus. Merr. N. Am. Faun., No. 2, 1889, p. 20. 

 Spermophilus leucurus. Elliot, Syn. N. Am. Mamm., 1901, p. 86. 



13 Specimens: 4 San Matias Spring; 2 Parral; 1 Trinidad, San 

 Pedro Martir Mountains; 6 San Felipe, Gulf of California. 



