MET/CHIRUS. D1DELPHYS. 13 



ALLEN'S OPOSSUM. Tlacuazin in Guatemala. 



Type locality. Unknown. 



Geogr. Distr. Southern Mexico to Costa Rica. 



Genl. Char. Size medium; tail longer than head and body; ears 

 large. 



Color. Above blackish washed with gray; top of head and 

 median line black; flanks gray; under parts yellowish white; a band 

 above and a broader one below ears, and spots above eyes, yellowish 

 white ; outer surface of limbs paler than sides of body ; inner surface 

 yellowish white ; tail dark brown at base, grading into light brown or 

 flesh color at tip, heavily furred at base, remainder naked; feet 

 brownish, naked; ears flesh color broadly edged with dark brown. 



Measurements. Total length, 534; tail, 283; hind foot and claws, 

 39. Skull: basal length, 62; nasals, 32; canine to posterior edge of 

 last molar, 25.5; palatal length, 38; zygomatic breadth, 32; mastoid 

 breadth, 19; interorbital constriction, 8.5. (Type.) 



a. }>ulti(lus (Metachirus), Allen, Bull. Am. Mus. Nat. Hist., 1901, 



p. 215. 

 ORIZABA OPOSSUM. 



Type locality. Orizaba, State of Vera Cruz, Mexico. 



Geogr. Distr. States of Vera Cruz, Puebla, and Tabasco, south- 

 eastern Mexico. 



Genl. Char. Similar to M. fuscogriseus, but lighter; orbital spots 

 larger. 



Color. Head black above with two large spots above eyes, and a 

 brownish white stripe on each side of nose ; rest of upper parts black- 

 ish gray, darkest on dorsal line; side of body gray, paler than back; 

 side of head, throat, hands, feet, and entire under parts yellowish 

 white ; tail at base furred like the back ; naked portion black for two- 

 thirds the length, spotted with flesh color, remaining part all flesh 

 color. 



Measurements. Total length, 475-627; tail, 240-315; tarsus, 

 38-47. Skull: total length, 77; basal length, 69; length of nasals, 37; 

 zygomatic width, 39; across postorbital processes, 14.3; interorbital 

 constriction, 9; mastoid width, 25; palatal length, 42; length of upper 

 molar series, 15. (ex Type.) 



5. Didt'lphys. 



T 55. p Ir2 . P 2i^ . \f tl4 ro 

 L '4-4' U I-I F M-3' M '4-4 - 5' 



J. A. Allen. .4 Preliminary study of the North American Opos- 

 sums of the genus Didd phis!, Bull. Am. Mus. Nat. Hist., 1901, p. 149. 



