FIELD BOOK OF MAMMALS 



Chiricahua Harvest Mouse. — Reithrodontomys megalotis art- 



zonensis (Allen). 

 Resembling typical megalotis in size, but tail longer, pelage 

 darker and more ochraceous. Closely similar to longicaudus, 

 but redder on head, blacker on ears, and grayer on tail. 

 Upperparts ochraceous buff thickly sprinkled with black, 

 face buff y ; underparts white, with ochraceous pectoral area ; 

 tail above, mouse-gray, below, grayish white. Total length, 

 5.8-6.1 inches; tail vertebrEe, 3-3.2 inches; hind foot, .65 

 inch. Known only from the type locality, Rock Creek, 

 Chiricahua Mountains, Arizona, about 8000 feet altitude. 



Cata!i..a Harvest Mouse. — Reithrodcntoniys catalincB Elliot, 

 Larger and paler than megalotis longicaudus. Upperparts 

 (spring pelage), light ochraceous buff mixed with blackish 

 brown, darkest dorsally but lacking a definite stripe; tail 

 bicolor, brown and white; underparts white, with buffy 

 pectoral spot. Total length, 6.6-7 inches; tail vertebras, 

 3.6-4 inches; hind foot, .75 inch. Found only on Santa 

 Catalina Island, California. 



Red-bellied Harvest Mouse. — Reithrodontomys raviventris 

 raviventris Bixon. 

 Resembling megalotis longicaudus, but reddish below and 

 upperparts darker. Upperparts, pinkish cinnamon mixed 

 with black, most darkened on dorsal area ; underparts pink- 

 ish cinnamon, occasionally with a small white chin spot; 

 hind feet and tail fuscous to sepia, tail not sharply bicolor 

 only slightly lighter on underside; toes whitish; front feet 

 sepia, sometimes washed with buffy white. Total length, 

 4.8-5.8 inches; tail vertebras, 2.2-3 inches; hind foot, .65 

 inch. Found in "Salt marshes of San Francisco Bay, Cal." 

 (Howell) 



Petaluma Marsh Harvest Mouse. — Reithrodontomys raviven- 

 tris halicoetes (Dixon), 

 Larger than typical raviventris and underparts white instead 

 of cinnamon. Larger and darker than megalotis lo7igicatidus 

 and with large white patch on throat, Upperparts, ochrace- 

 ous buff with hea\y mixture of black along back ; underparts 

 white, occasionally with irregular blotches of ochraceous 

 buff; feet white or buffy; tail fuscous above, grayish below; 

 a white patch on throat and sides of mouth, the hairs white 

 to their bases. Total length, 6-6.6 inches; tail vertebrse, 

 3-3.4 inches; hind foot, .7-.75 inch. Found in "Salt 

 marshes of San Pablo Bay, Suisun Bay, and the lower San 

 Joaquin and Sacramento Rivers." (Howell) 



Fulvescens Group 



RiD Grande Harvest Mouse.- — Reithrodontomys fulvescens in- 

 termedins (Allen). 

 Upperparts, light ochraceous-buff, with heav}^ mixture of 

 blackish brown along back; sides brighter; feet white; 



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