﻿NOTES ON SPECIMENS OF THE MONKEY-EATING EAGLE 



(P1THECOPHAGA JEFFERYI GRANT) FROM 



MINDANAO AND LUZON. 



By Richard C. McGregor. 



Through the courtesy of Chaplain Joseph Clemens and Lieutenant 

 Farrel of the Fifteenth Infantry, United States Army, I have been 

 able to examine a specimen of PithecopJiaga jefferyi, taken near Camp 

 Keithley, Lake Lanao, Mindanao. The specimen was purchased from 

 a Moro by Lieutenant Farrel and was sent by him to the Bureau of 

 Science. Unfortunately, several of the primaries on each wing have 

 been clipped and the cere has apparently been eaten hy ants, but other- 

 wise the specimen is in good condition. Its sex was not determined. 

 Compared with the one in the Bureau of Science collection, which was 

 taken in Luzon, the present specimen is found to differ' in being slightly 

 larger and the feathers of the chin, the side of the jaw, and of the malar 

 region have distinct, blackish shaft stripes. 



The following measurements may be added: Wing (primaries clip- 

 ped), 23.75 inches; tail, 18.25; chord of culmen without cere, about 

 2.35; depth of upper mandible at nostril, 1.54; width of upper mandible 

 where cere meets tomium, 0.84; tarsus, 5; middle toe with claw, 4.60; 

 hind toe with claw, 3.54; width of middle tail feather, 3.30. 



Later, a second more perfect specimen was received from Chaplain 

 Clemens. This specimen, a male, was taken near Camp Keithley, Sep- 

 tember 27, 1906, and yields the following measurements: Wing, 24.80; 

 tail, 18.75; chord of culmen without cere, 2.57; depth of upper mandible 

 at nostril, 1.66; width of upper mandible where cere meets tomium, 0.80; 

 tarsus, 4.63; middle toe with claw, 3.78; hind toe with claw, 3.22; width 

 of middle tail feather, 3.30. 



On May 11, 1907, Mr. H. M. Ickis, geologist in the Bureau of Science, 

 killed a specimen of the monkey-eating eagle on the Agus River, in 

 eastern Rizal Province, Island of Luzon. This is, I believe, the first 

 specimen positively known to have been taken in Luzon. The head, a 

 wing, and a foot were brought to Manila. In this specimen the feathers 

 of the chin and the side of the face have the black shaft stripes noted in 

 the specimens from Mindanao. Measurements were taken from the 

 fragments as follows: Wing, 23.25; chord of culmen without cere, 2.45; 

 depth of upper mandible at nostril, 1.57; width of upper mandible where 

 cere meets tomium, 0.73; tarsus, 4.5; middle toe. with claw, 3.83; bind 

 toe with claw, 3.25. 



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