NO. 5 MAMMALS OF PANAMA — GOLDMAN 113 



Additional specimens taken by J. H. Batty at the type locality of 

 this species are recorded by Allen (1904, p. 70). 



Specimens examined : Boquete, 24 1 (including type). 



MACROGEOMYS PANSA Bangs 



Bugaba Pocket Gopher 



Macrogeomys pansa Bangs, Bull. Mus. Comp. Zool., Vol. 39, No. 2, p. 44, 

 April, 1002, text fig. 26. Type from Bugaba, Chiriqui, Panama (altitude 

 600 feet). 



Eight specimens collected by W. W. Brown, Jr., at Bugaba are 

 the basis of this foothill form which is evidently closely allied to 

 M. cavator, the animal occurring at higher levels on the Volcan de 

 Chiriqui. The close agreement of the two forms in the more 

 essential characters suggests their probable intergradation on the 

 lower slopes of the mountain. 



The following forms part of the original description: 



" Much smaller than the alpine, M. cavator; hind foot propor- 

 tionally much larger (actually nearly the same size) ; colors duller 

 and browner, more grayish white on belly ; pelage short, close, very 

 sparse on under parts, nose and sides of head and neck where the 

 skin shows through. Skull much smaller and weaker throughout, 

 with less spread to zygoma; nasals, shorter; interorbital width 

 greater; molar-form teeth much smaller. 



" Upper parts dull, dusky, chocolate-brown ; under parts grizzled, 

 the belly whitish : whiskers mostly colorless ; feet, hands, and tail 

 naked (in dried skin) yellowish brown, the tip of the tail dusky. 



" In July, when Mr. Brown was at Bugaba, birds were moulting 

 and mostly unfit for specimens ; consequently he spent consider- 

 able time searching for suitable places for future work, trapping 

 mammals, and collecting a few examples of some of the rarer birds. 

 On one of his long rides he came upon a single isolated colony of 

 pocket gophers. It was in the foot-hills, about 600 feet altitude, 

 and was the only colony he found in the whole region. The members 

 of this colony were rather hard to trap, as pocket gophers some- 

 times are, and unfortunately the only old <$ secured was caught in 

 the trap by the head and the skull crushed. The species is very 

 different from the large, black species found so abundantly on the 

 higher slopes of the Volcan de Chiriqui." 



1 Twenty-two in collection Mus. Comp. Zool. ; two in Amer. Mus. Nat. Hist. 



