Dr. A. Wagner on some new Brazilian Mammalia, 43 



Phyllostoma excisum, Wagn. P. ferrugineo-brunneum, subtus bru- 



nescens, prosthemate lanceolato, auriculis elongatis, emarginatis ; 



Cauda patagioque anali nuUis. — Altitude a vertice ad auum 2", 



antibrachium \" 6'". 



Ypanema. Mus. Monac. 

 Lutra solitaria, Natt. L. supra castaneo-fusca, subtus sordide albida, 



rhinario nudo ; cauda conica sensira attenuata, utrinque pauluium 



fimbriata; vellere laxo. — Corpus 2' 5", cauda 1' 3". 



Ypanema. 

 Didelphys pcecilotus, Natt. D. pilis laneis albidis, sericeis partim 



basi albis, apice nigris, partim [at rarissime] totis albis, capite albo 



anguste tristriato, auriculis albido-carneis, nigro-maculatis. — Mag- 



iiitudo fere D. cancrivorse. 



Angaba. 

 Didelphys dichura, Natt.* D. cano-rufescens, subtus albido-lutescens ; 



cauda longitudine corporis, albido-carnea, supra fusco-maculata, 



subtus apiceque immaculata. — Corpus 8^", cauda 9". 



Ypanema. 

 Didelphys qffinis, Natt. D. supra rufescens, subtus albido-lutescens ; 



cauda corpore paulum longiore, supra subtusque usque ad finem 



albido-maculata ; mastotheca nulla. — Corpus 9", cauda 10". 



Matto grosso. 

 Didelphys ochropus, Natt. D. lanigercB similis, at minor, magis ru- 

 fescens, capitis, colli truncique lateribus canescentibus ; cauda fere 



dimidia nuda. 



Barra. 

 Didelphys macrotarsus, Natt.f D.murirKB similis; auriculis multo 



majoribus ; cauda tota nuda, saturate rubello-cinerea ; pedibus pos- 



terioribus elongatis robustis. 



Didelphys microtarsus, Natt. D. murines similis ; auriculis multo 

 longioribus ; cauda saturate rubello-cinerea, subtus tenuissime 

 pilosa ; pedibus posterioribus abbreviatis gracilibus. 



Didelphys domestica, Natt. D. luteo-grisea, subtus pallide lutescens, 

 auriculis majusculis, capite baud striate ; cauda abbreviata, cras- 

 siuscula, pilis albis brevissimis paucissimis vestita ; mastotheca 

 nulla.— Corpus 1", cauda 2" 4'". 

 Cuyaba. 



Didelphys glirina, Natt. D. cinerascens, subtus pallide cano-lutes- 



* Both D. dichura and D. affinls are liable to be confounded with D. Phi- 

 lander. The diagnosis for D. Philander might be as follows : Didelphys 

 supra rufescens aut canescens, subtus albido-lutescens ; cauda corpore mul- 

 tum longiore, parte nuda fusca, dein alba, supra subtusque fusco-maculata, 

 apice longo immaculata albido-carnea j mastotheca ventrali. — Corpus 11" 2"', 

 cauda 15", pars pilosa 2" 9'". 



-f" Didelphys macrotarsus and microtarsus may have been confounded 

 with D. murina, Neuw., which may be avoided by adopting the following 

 diagnosis for D. murina : D. auriculis minoribus, pedibus posterioribus gra- 

 cilibus, cauda nuda clare rubello-albida. 



