43 



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



nescens, prosthemate lanceolato, auriculis elongatis, emarginatis ; 



Cauda patagioque anali nullis. — Altitude a vertice ad anum 2'', 



antibrachium 1'' 6"'. 



Ypanema. Mus. Monac. 

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



rhinario nudo ; cauda conica sensim attenuata, utrinque paululum 



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



Ypanema. 

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



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



anguste tristi'iato, 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 affinis, 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. lunixjcrte similis, at minor, magis ru- 

 fescens, capitis, colli trunciquc lateribus canescentibus ; cauda fere 



dimidia nuda. 



Barra. 

 Didelphys macrotarsus, Natt.f D.mm'incB similis; auriculis multo 



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



terioribus elongatis robustis. 



Didelphys microtarsus, Natt. D. murincE 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 striato ; cauda abbreviata, cras- 

 siuscula, pilis albis brevissimis paucissimis vestita ; mastotheca 

 nulla. — Corpus 7'', cauda 2" 4'". 

 Cuyaba. 



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



* Both D. dichura and D. affinis 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; mastotheca ventrali. — Corpus 11" 2"', 

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



t Didelphys macrotarsus and microtarsus may have been confounded 

 with D. 7nurina, Neuw., which may he avoided by adopting the following 

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

 cilibus, cauda nuda clare rubello-albida. 



