572 



PATAGONIAN EXPEDITIONS : ZOOLOGY. 



General description : 



Size. — Adult male. P. U. O. C. 8304. Arroyo Eke, Patagonia, 24 

 April, 1898, A. E. Colburn, collector. Or. No. 348. 



Total length, 20.75 inches. 



Wing, 15.25 inches. 



Culmen (from cere to tip), 1.25 inches. 



Tail, 8.85 inches. 



Tarsus, 2.90 inches. 



Females average, when adult, a little larger than the males and there is 

 a notable variation individually without regard to sex. 



Fig. 286. 



Ibycter albogidaris. P. U. O. C. 8304. Natural size. 



Color. — Adult male. P. U. O. C. 7955. Arroyo Eke, Patagonia, 26 

 April, 1898, A. E. Colburn, collector. Or. No. 350. 



Head : Forehead white, narrowest in the center and widening into a 

 more or less definite spot on the sides. Crown and sides of face and 

 head glossy black. Bare region in front and below eye, as well as on lower 

 mandible, with black hairs. The feathers of the crown and occiput lance- 

 olate, but not much elongated and only slightly recurved. 



