214 Field Columbian Museum — Zoology, Vol. III. 



and throughout the San Pedro Martir Mountains up to at least six 

 thousand feet elevation, and thence to the east coast, as the speci- 

 mens were taken, as will be noticed, at San Felipe bordering the Gulf 

 of California. The four specimens from San Quentin have been 

 referred to P. thurberi, but with some hesitation. 



Peromyscus hemionotis. 



Peromyscus hemionotis. Elliot, Pub. Field Columb. Mus., 1903, 

 iii, p. 157, Zoology. 



2 Specimens from the Rosarito Divide, San Pedro Martir Mts. 



Peromyscus gaurus. 



Peromyscus gaurus. Elliot, Pub. Field Columb. Mus., 1903, iii, 

 p. 157, Zoology. 



6 Examples from San Antonio, San Pedro Martir Mts. 



Mr. Heller says this mouse was common about the borders of the 

 stream, but only six were secured. 



Peromyscus homochroia. 



Peromyscus homochroia. Elliot, Pub. Field Columb. Mus., 1903, 

 iii, p. 158, Zoology. 



21 Specimens from San Quentin. 



Mr. Heller, referring to this species, as I believe, says it was com- 

 mon about the San Simon Canon. 



Peromyscus oresterus. 



Peromyscus oresterus. Elliot, Pub. Field Columb. Mus., 1903, 

 iii, p. 159, Zoology. 



15 Examples Hanson Lagoon, Hanson Laguna Mountains. 



Peromyscus fraterculus. 



Peromyscus fraterculus. Miller, Am. Nat., 1892, p. 261. Elliot, 

 Syn. N. Am. Mamm., 1901, p. 136. 



34 Specimens: 5 Ensenada, 2 Las Eucinas, 8 Trinidad, 5 head of 

 San Antonio River, 7 San Antonio, 3 Rosarito, 4 San Quentin. 



This species was quite abundant wherever met with. 



Peromyscus martirensis. 



Peromyscus martirensis. Allen, Bull. Am. Mus. Nat. Hist., 1893, 

 p. 187. 



73 Examples: 2 San Matias Spring, 2 Pinon, 9 Aguaje de las 

 Fresas, 8 Vallecitos, 7 La Grulla, 7 Santa Rosa, 9 Santa Eulalia, 

 San Pedro Martir Mountains; 1 Calobozo, 6 Palomar, 4 Agua 

 Escondido, 18 Hanson Lagoon, Hanson Laguna Mountains. 



