580 ORNIXnOLOGY. 



4.Sn, 9 ad.; Ciirson, Ncva.lii, April 4, l.SGS. 11—24— Si—CJ. Cere (entirely snr- 

 rouniliiiK '"ase of the bill), bare orbital region, and tarsi au<I toes, intense reildisb- 

 orange, or orange-cbronie. 



4!)G, i ad; Carson, April 18, 18GS. l^—2^—7\l—^. Same remarks. 



810, egg ( 1 ) ; Fort Cliurebill, Carson Uiver, Jnne 24, I8(i8. Egg, with fonr downy 

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



Circus nunsoxius. 



Itlai'Nii II:i%vk. 



Falco hudsonius, LiNN., Syst. Nat., I, 17GG, 128. 



Circus hitdsonim, Vikill., Ois. Am. Sept., I, 1807, 30, pi. IX. — Cassin, Baird'a 



Birds N. Am., 1858, 38.— lUiRD, Cat. N. Am. Birds, 1859, No. 38.— Coopkr, 



Orn. Cai., I, 489. 

 Circus cyanaui hudsonius, Schleg., Mas. PaysBas, Circi, 18G2, 2. 

 Circus cj/aneus var. hudaonius, ALLEN, Bull. Mus. Comp. Zool.. Ill, 1872, 181. — 

 • COUKS, Key, 1872, 210, fig. l.V.t; Cbeek List, 187.!, No. :V.V.i; Birds N.W., 1874, 



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



No marsh of any e.xtent was visited, either in winter or summer, Avhere 



this Hawk could not be seen at almost any time during the day skimming 



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



kinds, the young of water-fowl, lizards, and probal)ly small mammals, 



although the latter Avere 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 wliiili tliis Hawk appears to be a most 



dreaded enemy, since its appearance creates perfect consternation among 



all tlie Sparrows in its path, wlio utter distressed cries, and make confused 



and desperate efforts to escape by plunging precipitately into the thickest 



bushes. 



List of specimens. 



V20,9 jitv.; eastern shore of Pyramid Lake, August 15, 18G7. 19.J— 43.^— 13g— 

 Hi— 'J— -S — 9J — 6. Bill, deep black, more bluish ba.sally; cere and rictus, greeni.sli- 

 ganiboge, most yellowi.sb on top; iris, yellowish gray ; tarsi and toe.s, rich orange- 

 j ellow ; claws, jet-black. 



131, Sjuc; Big Bend of the Truckee (Camp 12), August 17, 1SG7. 18^— 12—1.;— 

 11— 24— 2J— 9— GJ. Same remarks. 



3G7, 9 juv.; Truckee Reservation, near Pyramid Lake, December 21, 18G7. 20^ — 

 44 — 15 — 12J. Iris, dull fulvous. 



