MAMMALS OF THE MEXTOAN ROT'NDARY. l7l 



tail ralluT loiii;-; iioofs I'allu'i- ('l(»ii<j,al('. Skiill Avith tlu' xuiiu'f (!i\i(l- 

 ing the posterior iiares into two distinct chambers. Lachrymal 

 A'acnity very hirge, and hichrymal fossa small. Auditory hulhe 

 slightly inflated. Dentition.— T ""11; C ^'^J; Pm g; M ■Ji:]=;5--\ Ver- 

 tebra-: C 7, D i;]. L (;, S 4. Ca (about) lo. Tail lono- or short. Color 

 uniform in adnlt. 



KEY TO THK MKXICAN I!()l'M)ARY KORMS OK ODOCOn.KlS. 



a. Size lar,ij;e; lachryinnl fossa deep, foniiiii.i; a ])it; Iku-iis dichotonious ; nieta 



tarsal gland elongate; tail conii)ose<l of about short vertei)ru>, naked at 



base below. 



h. Tail short, compressed at l>ase and ex[)anded intn a heavy terminal brush. 



naked below for more than half its length; metatars.-il gland gi-e:itly 



elongated. 



c. Upper side of tail with a median l)lack strijie; color dark and very red in 



summer Odocoilcns hriiiioiiiiK cfilif()riiicii.'< (p. 211). 



CO. Tipper side of tail all white at middle; color pale and less red in sunnner. 

 (1. Size large; color pale; beam of horn long and stout, and horns very 



divergent Odocoilriis hctiiioniis crciiiiciis (p. 208). 



(/(/. Smaller; color darker ; horns less stout, more erect, and branched, 



and with a shorter beam OdocoUetiK Jioiiioinif: cnniiK (p. 101). 



hh. Tail longer, flattened and tapering throughout, black above, white below, 

 naked only at extreme base; metatarsal gland much shoi'ter. 



Odocoilciifi crool-'t (p. lSr»). 

 aa. Size smaller; lachrymal fossa shallow, not forming a pit; horns not dicho- 

 tonious; metatarsal gland extremely short; tail of about 11 elongated ver- 

 tebne, hairy to base below. 



e. Larger, adult male measuring 1,.585 mm. in total length; color mod- 

 erately pale; ears shorter, measuring 1(^>0 mm. from crown, with 

 black edges and tips: dentition heavy_Orfoco//e»,s te.rani(S (p. 171). 

 ec. Smaller; total length averaging 1,454 mm. in five adult males; 

 color extremely pale; ears longer, averaging 102 mm. from crown, 

 without black edges and tips; dentition weaker. 



Odocoilriis coiir.si (|). 17.1). 



ODOCOILEUS TEXANUS (Mearns)." 

 TEXAS WHITE-TAILED DEER. 



Dorcehi pints tcxainis Meakns, Proc. Biol. Sof. Wash.. XII, 180S. p. 2:'.. 

 January 27, 1808 (original description). ^ 



OdocoUcun tcraiiux, Thompson, Forest and Stn>am. LI. 1S'.)8, j>. 28(i, Octo- 

 ber 8. 1808. 



Odocoilriis Ic.rriisis. Mu.i.ek and Kehn. I'roc. Bost. Soc. Nat. Hist.. XXX. 

 No. 1. 1001. p. 17 (Syst. Ilesults Study N. Am. Mam. to close of 1000). 



\Odoroilriis (Ducricdiiiis] texoisis. Ei.uot, Field Col. Mus., Zool. Ser.. II, 

 1001. p. 40 (Synop. Mam. N. Am.). 



[Odocoilciis (iiiicriciiiiiis] ir.rciisis, Fr.i.ioT. Field f'ol. Mus.. Zool. Ser.. IV. 

 I't. 1. 10(14. p. 70, i>ls. xxxix, XXX ( Mivm. .Mill. .\m.). 



"An illustration (fig. 0), showing a skull and audital region of Odoroilcns 

 aiiirricainis, is introduced for purpost^s of (•()mi)arison. 



