1918] Grinnell: A Synopsis of the Bats of California 345 
Corynorhinus megalotis pallescens, G. M. Allen (1916, pp. 341-344), part. 
Description; localities of record. 
Corynorhinus megalotis townsendii, G. M. Allen (1916, pp. 344-347), part. 
Description; localities of record. 
Diagnosis—Similar in general characters to Corynorhinus rafi- 
nesquiu pallescens Miller and Corynorhinus rafinesqui townsendit 
(Cooper), but intermediate in color between these two forms; darker 
colored and larger than pallescens. 
Description—aAs compared with pallescens, intermedius is some- 
what larger in general size; ten examples of the latter form from 
Auburn, Placer County, average 102 millimeters in total length, while 
ten specimens of pallescens from the San Jacinto region average but 
97.2 in the same dimension. In color intermedius is natal brown 
above; below, wood brown; membranes bone brown. 
Measurements——A series of ten specimens from west-central Cali- 
fornia shows averages and extremes in millimeters as follows: Total 
length, 102 (extremes, 97.0-108.0) ; tail vertebrae, 48.6 (45.0—-55.5) ; 
tibia, 19.7 (18.7-21.0); foot, 9.8 (9.0-12.5); forearm, 42.0 (40.2— 
43.6); greatest length of skull, 16.2 (15.4-17.1). 
Distribution —tThe evidence at hand indicates that this bat oceu- 
ples a geographic position intermediate between that of pallescens 
and that of townsendii, namely the semi-arid and semi-humid portions 
of the Upper Sonoran zone in California west of the desert divides. 
(See map, text-fig. T.) 
Specimens Examined.—Total number, 44, from the following 
loealities in California: Tulare: County: Eclipse Mine, White River, 
12 (Stanford Univ.) ; Placer County: Auburn, 23; Pioneer Cave, 3; 
Santa Catalina Island: Johnson Harbor, 1; Napa or Sonoma County : 
Mount Veeder, 1 (U.S. Biol. Surv.) ; Siskiyou County: Happy Camp, 
1 (U. S. Biol. Surv.) ; San Benito County; Bear Valley, 2 (U. S. 
Biol. Surv.) ; Hernandez, 1 (Calif. Acad. Sci.). 
Natural History —tThere are in the Museum of Vertebrate Zoology 
three females of intermedius taken in Pioneer Cave, Placer County, 
May 12, 1870, by J. G. Cooper; and five females and one male taken 
at Auburn, Placer County, July 31, 1909, by Dr. J. C. Hawver. On 
August 6, 1913, Dr. Hawver secured fifteen females and two males 
in the belfry of the grammar school at Auburn. Dr. Hawver stated 
in a letter that these bats oceur at Auburn the year around, showing 
no signs of being migratory. 
Remarks—An example of intermedius from Mount Veeder, on 
the border between Napa and Sonoma counties, varies strongly in the 
direction of townsendii. While Mount Veeder is not exactly within 
the humid coast belt, yet it lies in a region where there is a strong 
