1904.] Allen, Mammals from Santa ^[a>ta, Colombia. 



letters y., m., and o. indicate, respectively, young-adult, 

 middle-aged, and old.) The females average smaller than the 

 males, but some of the old males in the Santa Marta series are 

 smaller than some of the females. That this exceptional 

 condition is real and not due to mistakes on the part of the 

 collector in sexing is shown by the skins, in which the sex is 

 unmistakably evident. 



EXTERNAL MEASUREMENTS. 

 A. Alouatta semculus rubicunda. 



23373 $ Total length, 1308; head and body, 622; tail vertebrae, 686. 



2337 1 <$ " 1308; 



23374 $ 1219; 571; 648. 



23376 $ i38; 59; 7 l8 - 



23385 <* IJ 33; 415; 718. 



25754 $ 1410; ; 



14655 $ 1346; 597'' 749- 



14653 ? I2 7; 559; 7"- 



14654 ? 1245; 534; 7"- 



14656 ? " " 1219; " 559; 660. 



23377 $ 1320; 57 1 ; 749- 

 23757 ? 1270; 540; 73- 



23360 ? 1270; ; 



23361 ? 1295; 



B. Alouatta seniculus caucensis. 



14162 $ Total length, 1243; h. and b. 603; t. vert, 640; h. foot, 135; car, 35. 



14163 $ " " 1185; " " "574; ' 6n; ' 135; ' 33- 

 14168 $ " " 1045; "495; ' 55; ' I 3; 



14170 $ " " 1014; " "483; ' 53 1 ; ' I2 s; 



14167 S " " 1050; " " "494; " " 556; ' 126; ' 3 2 - 



