RACCOONS OF NORTH AND MIDDLE AMERICA 57 



Remarks. — P. I. psora has commonly been treated by authors as 

 specifically distinct from P. I. lotor of the eastern United States. 

 This is not so surprising as direct comparison of the skulls of these 

 widely separated subspecies reveals rather striking differences, especi- 

 ally the much larger general size, and broader, flatter frontal region 

 with much more prominent postorbital processes of psora. These 

 differences, however, are completely bridged by the intervening forms. 

 P. I. psora passes gradually into P. I. pacificus in northern California 

 and southwestern Oregon, and some specimens from those regions 

 might with similar propriety be referred to either form. Some 

 specimens from near the type locality of P. I. californicus suggest 

 gradation toward P. I. pallidus, but general comjiarisons indicate that 

 californicus cannot satisfactorily be separated from psora. 



Specimens examined. — Total number, 198, as follows: 



Baja California: Laguna Hansen, 1;" San Quintin, 1; San Ramon (mouth of 



Santo Domingo River), 2; -^ San Telmo, 1 (slvin only) ; -' Valle de las Palmas, 



I (skin only). 2^ 

 California: Areata, 2; ^^ Baird, 1; Bakersfield, 1; -" Banta, 1 (skull only) ; Berkeley, 



4;-" Bodfish, 1; Bradley, 3 (1 skull without skin, 2 skins without skulls); 



Camp Meeker, 1; Carbondale, 1;-" Carlotta, 1;-^ Cassel, 4 (skulls only); 



Cazadero, 1 (skull only); -' Chico, 4; Colusa, 2 (1 skull without skin); Covelo, 



1 (skull only) ; Cuddeback, Humboldt County, 2 (skulls only) ; ^7 Cuyamaca 

 Mountains, 1;-^ Cypress Point, Monterey County, 1;^" Dyerville (5 miles 

 south), 1; Eel River (southwest of South Yollo Bolly Mountain), 2; EI 

 Portal, 2; " Eureka, 1; ■'' Fort Tejon, 2 (1 skull only); Gazelle (5 miles east), 



2 (skulls only); Glen Ellen, 1; Grass Valley, 3; ^'' Grizzly Island, 1; " Gualala, 

 1; ■' Hay Fork, Trinity County, 1; " Helena, 3; 2? Hoopa Valley, 1; Hum- 

 boldt Bay (Carson's Camp, Mad River), 1; Inverness, 1 (skull only); Isa- 

 bella, 1; " Jolon, 3; Julian, 2; " Kern River (25 miles above Kernville), 1; 

 Klamath River, Siskiyou County, 1 (skull only) ; Knight's Landing (near 

 type locality), 1; La Jolla, 1; -^ Lake Merced, 1; -^ Lassen Creek, 1; Layton- 

 ville, 2; Lierly's Ranch, Mendocino County, 1; Little Browns Creek, Trinity 

 County, 2 (skulls only); Little Shasta, 3; Lockwood, 2; Marysville Buttes, 

 2; " McCloud River (near Baird), 3 (2 skulls without skins); 2' Mendota, 1; 

 Menlo Park, 1;" Mission, Santa Inez, 1; Mohave River, 1 (skull only); 

 Monterey, 2; Mount Diablo, 1; ^^ Mount Saint Helena, 2; Mount Sanhedrin, 

 2 (1 skull without skin); ^7 National City, 2; Nelson, 1 (skull only); Nicasio, 

 10 (5 skulls without skins) ; Orland, 1 (skin only) ; Ornbaun Spring, Hum- 

 boldt County, 1 (skull only) ; -' Pacific Ocean beach, near Monument 258, 

 Mexican Boundary, 1 (type of californicus); Paine Creek (Dale's Ranch), 

 Tehama County, 4 (2 skins without skulls); -' Pescadero, 5; -" Pine City, 2 

 (skulls only) ; Pitt River, Shasta County, 1 (skull only) : Placerville, 2 (skulls 

 only) ; " Pleyto, 2 (skulls only) ; Point Pinois, 1 ; Point Reyes, 4 (2 skulls 

 without skins); Portola, 2; -^ Portola Lake, San Mateo County, 1; -" Posts, 

 1; Red Bluff, 1 (skin only); Rio Dell, 1 (skull only); Rockport, 1 (skull only); 

 Round Mountain, 3 (skull only); Rumsey, 1; '^' Saint John, Glenn County, 2; 

 San Emigdio, 3; San Francisco, 1 (skin only) ; San Luis Obispo, 3; SausalitO; 1 

 (skull only) ; -'' Shasta County, 1 ; Shasta Valley (6 miles east of Edgewood) , 



27 Mus. Vert. Zool. 



876119°— 50- 



