318 University of California Publications in Zoology [Vol. 12 



Description. — Ears, feet and fur as in M. c. californicus. Mem- 

 branes and bases of hairs everywhere as in californicus. On the back 

 the terminal portions of the fur are glossy cinnamon, and this color 

 extends down onto the sides. The terminal portions of the hairs be- 

 low are light buff in color, 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 (77.0-S3.0) ; 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 brainease. 6.8 (6.6-7.0) ; interorbital constriction. 3.0 

 (2.9-3.3). 



Sjiicimcns examined. — The writer has examined twenty-two speci- 

 mens of Myotis californicus quercinus from the following localities 

 in California: San Diego County — Cuyamaca, 2, Julian, 5; Santa Cruz 

 Island — Friar's Harbor, 3; San Bernardino Mountains, San Bernar- 

 dino County — Seven Oaks. 2, Bear Lake, 1, South Fork Santa Ana 

 River, 2; San Jacinto Mountains. Riverside County — Kenworthy. 1. 

 Schain 's Ranch. 1 ; Tulare County — Trout Creek. 2 ; Ventura County — 

 Matilija, 1, Mount Pinos, 2. 



Remarks. — The three specimens listed from Santa Cruz Island, 

 while slightly darker than typical quercinus, are still nearer to this 

 form than to M. c. californicus. 



Distribution. — The range of M. c. quercinus, as so far worked out. 

 occupies portions of the San Diegan fauna] division of southern Cali- 

 fornia, and the Santa Barbara Islands. The life-zone is high Upper 

 Sonoran and low Transition. The bats appear at late twilight and 

 are usually observed flitting close about the foliage of scrub, golden, 

 and black oaks. 



Myotis yumanensis sociabilis, new subspecies 

 Tejon Bat 



Type. — Female, adult; no. 5158, Mus. Vert. Zool.; Old Fort Tejon, 

 3200 feet altitude. Kern County. California; July 23. 1904; collected 

 by J. Grinnell ; original no. 715. 



Diagnosis. — Similar in general characters to Myotis yumam nsis 

 yumanensis (H. Allen) and Myotis yumanensis saturatus Miller, but 

 intermediate in color between these two forms. 



