580 ORNITHOLOGY, 



489, 9 cul.; Carson, Nevada, April 4, ISCS. 11—24— Si—Ci. Cere (eutird.v sur- 

 rounding base of the bill), bare orbital region, and tarsi and toes, intense reddish- 

 orange, or orange-chrome. 



4!)G, $ ad.; Carson, April 18, 1808. l(ii— 23-5— Ti^— C^j. ^'""^ remarks. 



810, egg (1) ; Fort Churchill, Carson River, June 24, 1808. Egg, with four downy 

 young, deposited in a hollow snag of a cotton-wood tree, about 15 feet from the ground. 



Circus hudsonius. 



Marsh Ilairk. 



Falco hudsonius, LiNN., Syst. Nat., I, 1700, 128. 



Circus hudsonius, Vieill., Ois. Am. Sept., I, 1807, 30, pi. ix. — Cassin, Baird's 



Birds N. Am., 1858, 38.— Baird, Cat. N. Am. Birds, 1859, No. 38.— Cooper, 



Orn. Cal., I, 489. 

 Circus cyancus hudsonius, Sculeg., Mus. Pays-Bas, Circi, 1802, 2. 

 Circus cyancus var. hudsonius, Allen, Bull. Mus. Coinp. Zool., Ill, 1872, 181. — 



COUES, Key, 1872, 210, tig. 159; Check List, 1873, No, 333; Birds N,W., 1874, 



327.— B. B. & R,, Hist. N, Am. Birds, III, 1874, 214.— Deksiiaw, 1875, 416. 



Xo marsh of any extent was visited, either in winter or summer, where 



tliis Hawk could not be seen at iUmost any time during- the day skimming 



over the tales in search of its prey. The latter consists of small birds of all 



kinds, tlie young- of water-fc)-\\l, lizanls, and probably small mammals, 



although the latter were not found in the crop of any of the specimens 



examined. The stomachs and crops of those killed at Pyramid Lake 



•were filled to their utmost capacity with the remains of small lizards, and 



nothing else ; at the same locality, however, they were often observed to 



chase small birds, particularly Brewer's and the Black-throated Sparrows, 



the most numerous species, of which this Hawk appears to be a most 



dreaded enemy, since its apjjearance creates perfect consternation among 



all the Sparrows in its })atli, who utter distressed cries, and make confused 



and desijerate efforts to escape by plunging precipitately into the thickest 



bushes. 



List of specimens. 



129, 9 juv.; eastern shore of Pyramid Lake, August 15, 1807, 19J— 431— 13|— 

 11^ — 4 — -^i — ^i — 6, Bill, deep black, more bluish basally; cere and rictus, greenish- 

 gamboge, mo.st yellowish on top; iris, yellowish gray ; tarsi and toes, rich orange- 

 jellow; claws, jet-black, 



131, Sjuv.; Big Bend of the Truckee (Camp 12), August 1 7, 1S07. Is;*- fj— 13— 

 11 — ?^?2 — -« — ■' — ^'h- "^inne remarks. 



307, 9 juv.; Truckee Reservation, near Pyramid Lake, December 21, 1807. 20i — 

 44 — 15 — 12i. Iris, dull fulvous. 



