IT," PEROMYSCUS. 



black; ear inside orange at base, rest black, outside pale brown on 

 basal half, rest blackish with white edge. 



Measurements. Total length, 220; tail vertebrae, 116; hind foot, 

 23; ear, 19. Skull: occipito-nasal length, 25.5; Hensel, 19; zygo- 

 matic width, 12; interorbital constriction, 4; palatal length, 9.5; 

 width of braincase, 11.5; length of nasals, 9.5; width of rostrum, 3; 

 length of upper tooth row. 3; length of mandible, 11.5; height at 

 condyle, 4.5. 



297. Peromyscus mearnsi (Allen) 



\'esperinins inearnsii Allen, Bull. Am. Mus. Nat. Hist. X. V., 



1891, p. 300. 

 Pennnysais inearnsi Flliot, Syn. X. Am. Mamm., F. C. M. Pub., II, 



1901, p. 132. Zool. Ser. 

 MEARXS' FIELD MOUSE. 



Type locality. Brownsville, Cameron County, Texas. 

 Geogr. Distr. Texas to Arizona. 



298. Peromyscus canus Mearns. 



Peromyscns canns Mearns, Proc. U. S. Nat. Mus., 1896, p. 445. 



Elliot, Syn. N. Am. Mamm., F. C. M. Pub., ir, 1901. p. 132. 



Zool. Ser. 

 HOARY FIELD MOUSE. 



Type locality. Fort Clark, Kinney County, Texas. 

 Geogr. Distr. Texas to Oklahoma Territory. 



299. Peromyscus boylii (Baird). 



Hesperomys boylii Baird, Proc. Acad. Nat. Scien. Phil., 1855, p. 335. 

 Sitomysgilherti Allen, Bull. Am. Mus. Nat. Hist. X. Y.. 1893, p. 188. 

 Peromyscus boylii Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 



i go i, p. 132. Zool. Ser. /./. Mamm. Middle Amor. \- \V. 



Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 195. Zool. Ser. 

 BOYLE'S FIELD MOUSE. 



Type locality. American River, Eldorado County, California. 

 Geogr. Distr. Central and eastern California. 



rt. /'mini i/xr/i s li/njlii /in/ / ri /////// s Mearns. 



/'1,'ni ivsi n.s hoylii /><;// illiilits Mearns, Proc. U. S. \at. Mus., 

 1896, ]>. 130. Klliot, Syn. X. Am. Mamm.. F. C. M. Pub., II, 

 IMOI, ]). 133. Zool. Ser. /(/. Mamm. Middle Amer. cV \\'. 

 Indies. I ; . C. M. Pub., iv. Pt. i, iijcq, ]>. [96. Zo.,1. Ser. 



l'i w n i.D FIELD MOUSE . 



Type l<>< <ility. iMidthills of I'ranklm Mountains, near Fl Paso, 

 Fl Paso County, Texas. 



l Distl \orth\\esteni Texas. 



