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University of California Publications in Zoology  {|Vou.17 
Myotis californicus californicus, Grinnell and Swarth (1913, p. 381). 
Occurrence in the San Jacinto Mountains. 
Myotis californicus quercinus H. W. Grinnell (1914, pp. 317-318). Orig- 
inal description; type locality, Seven Oaks, San Bernardino County. 
Diagnosis—Similar to Myotis californicus californicus (Audubon 
and Bachman) and Myotis californicus pallidus Stephens, but inter- 
mediate in color between these two forms. Prevailing tone of color 
on back, cinnamon. 
Description.—Kars, feet and fur as in M. ce. californicus. Mem- 
branes and bases of hairs everywhere as in californicus. Terminal 
portions of fur on back, glossy cmnamon, this color extending down 
onto sides. Terminal portions of hairs on lower surface of body hght 
buff, rather than buffy-brown as in californicus, or pale cartridge- 
buff as in pallidus. 
Measurements.—A series of ten examples of M. c. quercinus from 
southern California averages in millimeters as follows: Total length, 
81.6 (extremes, 77.0-83.0); tail vertebrae, 36.8 (31.0-41.0) ; tibia, 
14.1 (12.5-15.0); foot, 6.0 (4.0-8.0); forearm, 31.9 (31.0-33.2) ; 
greatest length of cranium, 13.1 (12.9-13.8) ; zygomatic breadth, 7.7 
(7.4-8.0) ; breadth of brain-case, 6.8 (6.6—7.0) ; interorbital constric- 
tion, 3.0 (2.9-3.3). 
Synonymy and History—This form was always included under 
the name M. c. califormicus, until described by the present writer 
(1914; p. 317). 
Distribution—tThe range of M. c. quercinus, as so far worked 
out, occupies portions of the San Diegan faunal division of southern 
California, and the Santa Barbara Islands. The life-zone is high 
Upper Sonoran and low Transition. (See map, text-fig. M.) 
Specimens Examined—The writer has examined 41 specimens 
of Myotis californicus quercinus from the following loealities in Cali- 
fornia: San Diego County: Cuyamaeca, 2; Julian, 5; Witch Creek, 2 
(San Diego Soe. Nat. Hist.) ; Dulzura, 3 (Amer. Mus. Nat. Hist.) ; 
Santa Cruz Island: Friar’s Harbor, 3; San Clemente Island, 4; Santa 
Catalina Island, 1 (coll. F. W. Koch) ; San Bernardino County : Seven 
Oaks, 2; Bear Lake, 1; South Fork Santa Ana River, 2; San Jacinto 
Mountains, Riverside County: Kenworthy, 1; Schain’s Ranch, 1; Los 
Angeles County: Los Angeles, 1 (Amer. Mus. Nat. Hist.) ; Pasadena, 
1; Ventura County: Matilija, 1; Mount Pinos, 2; Tulare County: 
Trout Creek, 2; Kern County: San Emigdio, 7. 
Remarks.—The specimens listed from Santa Cruz, San Clemente, 
and Santa Catalina islands, while slightly darker than typical quer- 
cinus, are still nearer to this form than to M. c. californicus. 
Natural History —tIn the San Bernardino Mountains, J. Grinnell 
(1908, p. 158) found these bats in the Transition Zone, where they 
were flitting close about the foliage of oaks and pines at late twilight. 
