56 NOHTH AMERICAN FAUNA 60, FISH AND WILDLIFE SERVICE 



PROCVON LOTOR PSORA Gray 

 C'ami'oh.xia I{ AC coon 



Procj/on psora (Iray, Ann. MaR. Xut. Hisl. 10 : 261, Dec. 1842. 



Proci/on lotor califorriiru.s Mearns, Biol. Soc. Washiiiii;ton Proc. 27: 66, Mar. 20, 

 1914. Type from ocean beach near last Mexican Boundary Moinnnent 

 (No. 258), San Diego County, Calif., No. 60675, female suhadult, U. S. Natl. 

 Mus.; collected by Frank Xavier llolzncr, July 16, 1894. 



Type locality. — Sacramento, Sacramento County, Calif. 



Type. — Perhaps in British Museum; collected by Captain Belcher. 



Disfrjbntion. — California, except extreme northwest coastal strip, 

 the nortlieastern corner and southeastern desert region, ranging south 

 through northwestern Baja California to San Quintin; extreme west- 

 central Nevada (Wilson Canyon, east slope of Sierra Nevada). 

 Lower Austral, Upper Austral, and Transition Zones. 



General characters. — A large, moderately dark form with a broad, 

 rather flat skull. Very similar to P. I. pacificus of Washington, but 

 averaging paler; skull usually more elongated and differing in detail. 

 Decidedly darker, less ashy gray than P. I. pallidus of the Colorado 

 River Valley, and cranial characters distinctive. Similar in general 

 to P. I. excehus of the Snake River Valley, but much smaller and 

 usually darker; skull relatively narrower. 



Color. — Similar in general to that of P. I. lotor, but upper parts 

 grayer, less suffused with buff under the overlying black-tipped hairs; 

 light rings on tail less bufify; rusty nuchal patch usually absent or less 

 prominent; black mask continuous across face, as in western forms in 

 general, instead of more or less distinctly interrupted on either side of 

 median line as in lotor. 



Cranial characters. — Skull closely resembles that of P. I. pacificus but 

 usually more elongated, the brain case less fully expanded, especially 

 anteroexternally ; interorbital region narrower; upper profile rather 

 flat and post orbital processes of frontals well developed as in 

 pacificus. Similar to that of P. I. excelsus, but smaller, relatively 

 narrower. Compared with that of P. I. pallidus, the skull is of similar 

 size, but relatively broader, with flatter frontal region. 



Measurement. — Adult male from Tehama, Calif.: Total length, 880 mm.; tail 

 vertebrae, 277; hind foot, 138. Adult female from Wheatland, Calif.: 870; 300; 

 120. Adult male and female from Nicasio, Calif., respectively: 901, 820; 348, 

 312; 132, 121. Skull: Adult male from Tehama and adult female from Wheat- 

 land, Calif.: Greatest length, 124.8, 120.4; condylobasal length, 120, 113; zygo- 

 matic breadth, 82.6, 79.2; interorbital breadth, 26.3, 26.8; least width of palatal 

 shelf, 17.6, 16.2; maxillary tooth row (alveoli), 44.2, 43.9; upper carnassial, 

 crown length, 8, 8.6, crown width, 9.3, 9.6. Adult male and female from Nicasio, 

 Calif.: Greatest length, 124.5, 118.7; condylobasal length, 116.6, 114.2; zygomatic 

 breadth, 82, 78.4; interorbital breadth, 24.2, 25.8: least width of palatal shelf, 

 16.4, 16.1; maxillary tooth row, 43.2, 41.8; upper carnassial, crown length, 8.8, 

 8.6, crown width, 9.7, 9.3. 



