On some new Species of Napeogenes. 155 



This is so evidently a local form of the Guianan Red-sided 

 Opossum that, much as it differs in colour, ifc seems best for 

 the present to regard it merely as a subspecies of that 

 animal. 



Peramys ricbidus, sp. n. 



Size, proportions, and cranial characters about as in 

 P. brevicaudalus, though the muzzle is slightly more slender. 

 Colour uniformly chestnut-rufous all over above and on the 

 sides, the head rather brighter rufous, and the posterior buck, 

 rather darker. Belly dull buffy grey, the hairs greyish 

 brown basally, dull buffy terminally. Outer side of limbs 

 and upper surface of hands and feet dull rufous. Tail also 

 rufous throughout. 



Dimensions of the type (an adult male, measured in 

 skin) : — 



Head and body (evidently stretched) 160 millim. ; tail 64; 



nd foot s. u. (wet) 18; ear (wet) 13. 



Skull: greatest breadth 19'i ; nasals 18 x 57; interorbital 

 breadth 66 ; palate, length from gnathion 20, breadth 116 ; 

 combined length of ms. l ~ 3 5'9. Lower jaw : back of condyle 

 to tip of first incisor 28. 



Hob. Bahia. 



Type B.M. no. 55. 11. 26. 9. 



This species is founded on the skin from Bahia referred to 

 P. brevicaudalus in the ' Catalogue of Marsupials,' colour- 

 characters being at that date thought of less importance than 

 they have since proved to be. 



XXII. — Descriptions of some new Species of Napeogenes. 

 By F. D. Godman, F.ll.S. 



Napeogenes aster, sp. n. 



N. stellar, Hew., similis, sed alis anticis costa ad basin nigra, alia 

 ambabus obscurioribus et punctis siibmarginalibiu minutioribus. 



Hob. Ecuador (0. T. Baron). 



T have three specimens of this insect, which is very 

 closely allied to N. stella, as stated above. It differs in 

 having the outer half of both wings darker, which clearly 

 distinguishes it. 



11* 



