1904.] Allen, Mammals from Tropical America. 55 



One of the females has elongated brownish hairs on the 

 frontal region (Cebus imitator Thomas), while in other cases 

 the males and females are alike in having the hairs of this 

 region of the same length and color in both sexes. 



23. Saimiri oerstedii (Reinhardt). Five specimens, Pozo 

 Azul, Ferris Province, May 31 and July 3, adult and young. 

 In the young the cap is gray washed with black, the middle 

 dorsal region is dull yellowish with a wash of dusky gray, and 

 the feet are yellowish gray. In the young adults the middle 

 of the back is more or less strongly varied with black, and the 

 cap is blackish instead of deep black as in the adults. 



III. CHIRIQUI, REPUBLIC OF PANAMA. 



This collection was made by Mr. J. H. Batty, during the 

 years 1900 and 1901, mainly at or near Boqueron and Boquete, 

 in the Province of Chiriqui, but it also includes specimens from 

 Coiba and other islands off the coast. The collection original- 

 ly included over one thousand specimens, and contained very 

 large series of all the more common species, such as the Mon- 

 keys (three species), Sloths, Anteaters, the large Opossum 

 (Didelphis), Spiny Rat, Agoutis, Squirrels, etc., all of which 

 I had an opportunity carefully to examine. Owing to the 

 small amount of funds available for the purchase of such 

 material, care was taken to select from the larger series such 

 specimens as would best show the range of seasonal and in- 

 dividual variation. 



It so happened that Mr. Outram Bangs's collector, Mr. W. 

 W. Brown, and Mr. Batty were working in Chiriqui at the 

 same time, and both collected in part at the same localities, 

 but Mr. Brown covered a wider field and did some collecting 

 at much higher altitudes than were visited by Mr. Batty. Mr. 

 Batty, however, had not completed his work, and on leaving 

 for a short visit to New York, the disturbed state of the 

 country prevented his returning to resume it, so that he had 

 to abandon a large number of specimens collected by his 

 native assistants after he left. 



A comparison of the present list with Mr. Bangs's excellent 



