47 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



Pterocyanea fratensis, Eyton, Syn. Anat. p. 65 (1869). 



GENERAL DESCRIPTION. 



Size. Adult male, 7976, P. U. O. C. Arroyo Eke, Patagonia, 9th 

 April, 1898, A. E. Colburn. Total length, 16.4 inches. 



Wing, 7.5. 



Culmen, 1.7. 



Tail, 3.5. 



Tarsus, 1.2. 



Color. (Male cited.) General color: Brown in varying shades, becom- 

 ing black and white in sharply contrasted barring of black and white on 

 the posterior half both above and below. 



FIG. 236. FIG. 237. 



Querquedula versicolor. Male. The same: bill from above. 



P. U. O. C. 7976. Profile of head. Reduced. Reduced. 



Head : With a seal-brown cap or hood extending from the forehead to 

 well down on the nape and reaching below the eyes ; sides of the face 

 and head buffy dirty white ; the two color areas of the head are in abrupt 

 contrast and do not blend. 



Neck : Buffy isabeline white, sometimes immaculate on the chin and 

 upper throat, but generally each feather is bordered with a very narrow 

 band of seal-brown, giving a barred or flecked, or in places a vermiculated 

 appearance ; these markings are best defined on the lower neck both 

 above and below. 



Back : Mantle dappled ; the feathers are black or dusky seal-brown, 

 each being tipped with buffy and crossed with two distinct bars of the 

 same color. Lower back, rump and upper tail-coverts barred black and 

 white ; the white bars are well defined but very narrow on the lower back, 

 the black bars or areas being five or six times as wide ; on the rump 



