Nov. 1907. BIRDS FROM GUATEMALA DEARBORN. 83 



43. Spizaetus ornatus Daudin. 



The only specimen seen was taken near Patulul by Mr. Barber. 

 This is in immature plumage, yet strikingly handsome with its white 

 head adorned by three long occipital plumes of dusky brown, white 

 under parts set off by heavy pectoral and axillary bars, and its 

 long legs, feathered to the toes and barred black and white. We 

 were told that this hawk occasionally visited the chicken yard. It 

 was shot from the top of a high tree in the woods, where it was sit- 

 ting apparently on the watch for prey. The irides of this bird were 

 straw-color; and they exhibited a graded depth of color from 

 lighter, next the supra-orbital process, to darker at the lower, un- 

 shaded portion. This feature has also been noticed in the eyes of 

 other large hawks. The increased pigmentation of the lower half 

 of the iris appears to offset the shading of the upper half by the 

 projecting supra-orbital process, and thereby to render the illumina- 

 tion of the retina more nearly uniform than would otherwise be 

 the case. 



44. Ictinia plumbea (Gmeliri). 



Several were seen at Los Amates, but only one was secured. 

 None were seen elsewhere. Iris maroon. 



45. Falco albigularis Daudin. 



One specimen was taken near Patulul and a pair at Mazatenango. 

 At the latter place one or two others were heard in the forest. None 

 were found away from heavy timber. They were in pairs and noisy 

 the third week in March, and were usually found sitting on the highest 

 dead-topped trees available. Iris dark brown. 



46. Falco sparverius Linnaeus. 



Two typical males, were taken in the highlands near Tecpam. 



47. Falco sparverius phaloena Lesson. 



Desert sparrow hawks were rather common at every station, where 

 there was much cleared land, below 2,000 feet. Only two specimens 

 were taken, one at Los Amates and one at Gualan. Both were 

 easily referable to this subspecies. 



48. Micrastur melanoleucus (Vieillof). 



A single example of this hawk was taken at San Jose. It does 

 not appear to be a common species. Iris brown; base of bill, ocular 

 area and feet vellow. 



