Osgood — Thirty ]\'ew Mice of the Genus Peromyfcns. 59 



Rtinarks. — P. t. rastaiicus is nearly the same color as P. roznmchi', which 

 is closely related. P. cozmnel.r differs chiefly in laro;er size and heavier 

 teeth. No s|>ecimens from the humid tropical rea;ion l)etween Orizaha 

 and Yohaltun are at hand, but canlaneiis is not sufficient!}' different from 

 mcfoinelai^ to warrant full specific rank. P. affltiix is a related form of the 

 adjacent arid tropics, and much paler than either caxtdncus or mesoynelitx. 



Peromyscus melanotis zamelas subsp. nov. 



'l)/}>(' from Colonia Garcia, Chihuahua, Mexico (altitude (5700 feet). 

 Adult female. No. 98,197, U. S. National ^Museum, Biological Survey 

 Collection, July 23, 1899, E. W. Nelson and K. A. Goldman. 



Clioraders. — Similar in general to P. mel<inolis but coloration more 

 sooty ; size small ; tail short; skull not peculiar. 



Color. — Sides dark cinnamon rufous, densely clouded with sooty ; broad 

 stripe from top of head to base of tail intense black ; orbital ring and base 

 of whiskers black ; sides of face suffused with sooty ; a cinnamon rufous 

 patch below eye continuous with a narrow lateral line of the same color; 

 feet white; tail sharply bicolor, black above, white below; under parts 

 white subdued by plumbeous untier-color. 



Shdl. — Practically as in melanotis; size quite small; molar teeth [)ar- 

 ticularly small. 



Medtntremenls. — Type: Total length, 160; tail vertebrae, 63 ; hind foot, 

 20. Skull of type : Greatest length, 25.9 ; basilar length of Hensel, 19.3 ; 

 zygomatic width, 13; interorbital constriction, 4; interparietal, 8 x 2.2 ; 

 nasals, 11 ; bony palate, 3.8; palatine slits, 5.3 x 2.1 ; diastema, 7; post- 

 palatal length, 8.5; upper molar series, 3.3. 



Peromyscus attwateri pectoralis subsp. nov. 



Type from Jalpan, Queietaro, Mexico. Adult male, No. 81,236, U. S. 

 National ^Museum, Biological Survey Collection, August 30, 1896, E. W. 

 Nelson and E. A. Goldman. 



Characters. — Similar to P. attwateri, but richer colored and, having a 

 jtrominent Imny pectoral spot; tail longer; size medium (hind foot 21- 

 23); superficially similar to P. crauicus ; color darker and more vinaceous ; 

 pelage slightly less silky ; tail longer and more hairy ; soles of hind feet 

 naked or with slight hairiness on heel; ankles usually white; skull rather 

 heavy ; molar teeth with small accessory tubercles of subgenus Pero- 

 )ni'/t!ruK. 



Color.— Type, m fresh fall pelage: Ground color of upper parts pale 

 ochraceous buff with a tliick sprinkling of dusky, producing an effect 

 nearly the shade of wood brown ; sides of head behind eyes grayish ; a 

 narrow blackish orbital ring; a distinct huffy ochraceous pectoral sjwt 

 usually present ; feet, and in most cases ankles, white ; under parts white ; 

 tail duskv above, white below. 



