340 DIBELPHTIB^. 



Naked part of tail grey proximally, yellow terminally, coarsely 

 mottled with the two colours at their junction. 



Skull and teeth apparently identical in every respect with those 

 of D. philander. 



Dimensions. 



3. 2- 



e (sMn). i (skin). 



Adult. Adult, 



millim. millim. 



Head and body 310 270 



Tail 380 390 



Hind foot (c.)40 (c.)38 



Ear — — 



Muzzle to eye 28 26 



SkuU, see next page. 

 Hah. Neotropical region, from South-eastern Mexico to Paraguay 

 (Guiana, Colombia, Ecuador, Peru, Mato Grrosso). 

 Type not in existence. 



JAd. sk. 1 ii.-4^/DQ Teapa, Tabasco, S.E. Messrs. Salvin & 



"• 1 SkulL I ^ ™ */"''• Mexico {H. H. Smith). Godman [P.]. 



h. Yg. sk. Chepo, Isthmus of Pan- Salvin Coll. 

 ama (_E. AreS). 



I Ad. St. I J, Colombia. Purchased. 

 "• 1 Skull, f o- 



d. Ad. sk. Medellin, Colombia. J. K. Salmon, Esq . 



[C.]. 



e. Ad. sk., cJ . Sarayacu, Ecuador. Mr. 0. Buckley, 



[C.]. 



f J Ad. sks. I , ri Balzar Mountains, Ecua- Mr. Ulinarworth, 



J' 3- I Skull of/. ( <^^- dor. [CJ. 



h. Ad. sk. Ecuador. Mr. L. Eraser [0.]. 



i. Ad. sk., g , QjQI&I. Ohamicuros, Peruvian Mr. E. Bartlett 



Amazons. [C.]. 



_;. Ad. St., ? . Purchased. 



IV. Subgenus MICOUEETJS. 



^ Type. 



Micoureus, Less. N. Tabl. R. A., Mamm. p. 186 (1842). . D. cinerea. 

 Asagis & Notagogus, <?%«•, Handb. Naturg. i. p. 82 (1842) D. murina. 



Thylamys, Qray, List Mamm. B. M. p. 101 (1843) D. elegans. 



GrymsBomys, Burm. Thiere Bras. i. p. 135 (1854) D. murina. 



Size small. Form slender ; tail long, generally much longer 

 than the head and body. Proportions of hind toes as in Philander, 

 but the fifth in some species not exceeding the second. Pouch 

 absent. Pur straight, rarely slightly woolly. 



Skull with a large broad brain-case. Supraorbital ledges present 

 or absent. Palate generally more or less incomplete. Eamas of 

 lower jaw simply rounded as usual. 



Teeth large and strong, canines of ordinary length. P.' generally 

 about one-quarter the size of p.', never minute. Upper p." and p.* 

 generally about equal in size. Molars increasing in size backwards, 

 as usual. 



