56 Bulletin American Museum of Natural History. [Vol. XX, 



report (Bull. Mus. Comp. Zoology, XXXIX, No. 2, April, 

 1902, pp. 17-51) on Mr. Brown's collection shows that Mr. 

 Brown secured a number of species that were not obtained by 

 Mr. Batty, but they came from altitudes far above the latter's 

 field of work, who did not collect above 5000 feet, while Mr. 

 Brown explored the Volcan de Chiriqui to above 10,000 feet. 

 Mr. Batty 's collection numbers 52 species, all but four of 

 which are from Chiriqui, the others being from Coiba Island. 



1. Marmosa murina mexicana Merriam. Two specimens, 

 Boqueron, Oct. 6 and 31. 



2. Caluromys laniger pallidus (Thomas). Six specimens, 

 all adult: Boqueron, 3, Oct. 25 and Dec. 5; La Parida Island, 

 3, Nov. 19 and 27. 



In coloration these specimens strongly approach C. I. 

 derbianus, and are very different from Mr. Thomas's descrip- 

 tion of his C. I. pallidus, of which he says : " General color pale 

 grey throughout, extreme examples being almost white all 

 over, but in other specimens the shoulders, sides of neck, and 

 the middle dorsal region are pale rufous, with an indistinct 

 trace of the grey stripe of Ph. I. derbianus." No two of the 

 Chiriqui specimens are alike in coloration; all but one dis- 

 tinctly show the pale gray median stripe over the shoulders 

 seen in derbianus, but with varying distinctness, from very 

 clear and strong to subobsolete, while the sides of the neck 

 and shoulders and the middle dorsal region are rufous, varying 

 in different specimens from light, clear rufous to dark, almost 

 chestnut rufous. The other specimen (one of the Parida 

 Island series) has the whole upper parts bright, nearly uni- 

 form rufous, even to the proximal half of the fore legs and the 

 entire hind legs, with no trace of the gray stripe on the 

 shoulders. A Costa Rica specimen, from the Irazu Range, is 

 gray with a tinge of rufous on sides of neck, shoulders, and 

 mid-dorsal region, and with a gray stripe over the shoulders. 

 A San Jose" specimen is similar except in lacking the gray 

 shoulder-stripe. A third Costa Rica specimen, from Boruca, 

 has the greater part of the dorsal region light rufous, and 

 merely a trace of the gray shoulder-stripe. None of these 



