416 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



easl of the San Joaquin Valley. It therefore represents a pale in- 

 terior form of the species. Doctor Allen's Perormscus robustus came 

 from t he mountainous region near the coast, and represents a somewhat 

 darker form of Peromyscus boylii, which it may prove desirable to 

 [•(•cognize, subspeeiheallv, as a northern coast form. 



Mr. Rhoads's Peromyscus major, from San Bernardino, California, 

 is not recognizably distinct from P. boylii. The specimens of this 

 species, collected by us on the east slope of the Coast Range, next to 

 the Colorado Desert, agree with Baird's type of P. boylii and also 

 with specimens from San Bernardino, California, the type locality of 

 Rhoads's P. major. But from the west slope of the Coast Range we 

 obtained a series of specimens that are somewhat darker in color, but 

 not sufficiently different from typical boylii to merit separation as a 

 race, being, in fact, much paler than Doctor Allen's type of P. robustus, 

 which I have compared. 



Measurements <>/ 15 specimens of Peromyscus boylii. 



Locality. 



Mountain Spring, San Diego County, 

 California, near Monument No. 230. 



Eastern base of Coast Range Moun- 

 tains, San Diego County, Califor- 

 nia. 



Jacumba 1 1 < > t Springs, San Diego 

 Count v, California, near Monu- 

 ment No. 233. 



.1.) 



Nachoguero Valley, Lower Califor- 

 nia. 



...do 



....do 



....<!(. 



Campbell's Ranch at Laguna, San 

 Diego County, California. 



..1... 



.do. 

 .do. 

 .do. 



1894. 

 May 13 



May S 



May 28 



May 30 



.June 1 



June 8 

 June 15 



June 18 

 June 12 

 ....do ... 



.June 15 

 June 16 

 June 2o 



m m . 

 23.6 



22. 5 

 22.5 



23.0 



22. 5 



22.11 



23 



22. 5 

 22. 2 

 22. 

 21.0 



22. 5 

 22.0 



mm. 

 16.5 



15.0 



11.:-! 



15.5 

 16.0 



13.0 

 16 



16.0 

 14.7 



15.11 

 16.0 



14.0 

 15.11 



PEROMYSCUS BOYLII PINALIS (Miller). 

 APACHE BRUSH-MOUSE. 



Sitomys rowleyi pinalis Miller, Hull. Am. Mus. Nat. Hist., V, Art. Will. Dec- 16, 



1893, p. 331 (original description). 

 Peromyscus rowleyi pinalis, Allen, Bull. Am. Mus. Nat. Hist., VII, Art. VI, June 29, 



1895, p. 227. 



