328 CIKCUS CYANEUS VAR. HUDSONIUS, MAHSH HAWK. 



Cirmis hudsonius, A^ieill., Ois. Am. Sept. i, 1807, 36, pi. 9.— Cass., 111.1,1854,108.— 



Brew., N. A. 061. 1857, 42.— Cass., B. N. A. 1858, 38.— Newb., P. K. R. Kep. vi, 



1857, 74.— Kenx., ibid, x, 1859, pt. iv, 19.— Heerm., ihid. pt. vi, 33.— Coop. >i; 



SUCB., ibid, xii, 1859, 150.— Hayd., Rep. 1862, 153.- CouES, Pr. Pbila. Acad. 



1866, 49.— EiDGW., Pr. Phila. Acad. 1870, 141.— Sti;v.. U. S. Geol. Surv. Tei . 



1870,462.— Meer., ibid. 1672, 6?:^.— Sxow, B. Kaus. 1873, 2 ; and of most authors. 

 Ch-cus {Sirigiceps) hudsonius, Gray, Hand-list, i, 1869, 37, No. 365. 

 Strigiceps hudsonius, Bp., Consp. Av. i, 1850, 35. 

 Falco uliginosxis, G-M., Syst. Nat. i, 1768, 278.— Lath., lud. Oru. i, 1790, 40.— DAUD.,Tr. 



Orn. ii, 1800, '173.— S.VB., App. Prauk. Jouru. 671.— WiLS., Am. OrD. vi, 1612, 



67, pi. 51, f. 2 {Jilarsh Mau'l; Edw., pi. 291 ; Arct. Zool. ii. No. 105 ; Gen. Syn. i, 90). 

 Circus uliginosus, Vieill., Ois. Atu. Sept. 1, 1607, 37.— DeK.vy, N. Y. Zool. ii, 20, pi. 3, f. 6,7. 

 Circus (Sirif/iceps) uliginosus, Kaup, Mus. Seuck. 1845, 258. 

 Strigiceps uiiginosus, Bp., List, 1838, 5. — Kaup, Men. Falc. Cont. Orn. 1650, 58. 

 Falco variegatus, Gm., Syst. Nat. i, 1768, 276. 

 Circus variegatus, Vieill., Ois. Am. Sept. i, 1607, 37. 

 Falco albidus, Gm., Syst. Nat. i, 1766, 276. 



Falco Imffonii, Gm., Syst. Nat. i, 1766, 277.— Daud., Tr. Orn. ii, 172. 

 Falco ct/aneua, vars. S et y. Lath., Ind. Orn. i, 1790, 40. 

 Falco glaucus, sub-coeruleus, et ranivorus, Bartr., Trav. 1791, 290. 

 Falco europogistus, Bosc. — Daud., Tr. Oru. ii, 1800, 110. 

 Circus europogistus,YrErL\.., Ois. Am. Sept. i, 1607, 36, pi. 8. 

 Falco hgemalis var., Lath., Ind. Orn. Suppl. 8 (SIricliland). 

 Falco a'ruginosus var., Shaw, Gen. Zool. vii, 117 (Strickland). 

 Falco picaius, Siiaw, Gen. Zool. vii, 167 {Strickland). 

 Falco ccesius, Ord, Guthrie's Gsog. 2d Am. ed. 315, 

 Falco cyancus, Bp., Am. Orn. ii, 30, pi. 12 ; Syn. 1828, 3;i, sp. No. 22 : Isis, 1832, 1038.— 



NUTT., Man. i, 16:;;!, 109.— AuD., Om. Biog. iv, 1638, 396, pi. 356.— Peab., Rep. 



Orn. Mass. 1639, 62. 

 Circus cyaneus, AuD., Syn. 1839, 19.— AuD., B. Am. i, 1840, 105, pi. 26.— Gm., B. L. L 



1844, 21.— WOODII., Sitgr. Rep. 1653, 61. 

 Buteo (Circus) cyaneus? var. .' americanus, Sw. & Rich., F. B. A. ii, 1831, 55, pi. 29. 

 Circus cyaneus hudsovius, Schl., M. P.-B. 1862, Circi, p. 2. 

 Circus cyaneus var. hudsonius, Allen, Bull. M. C. Z. iii, 1672, 181. — CouES, Key, 1872,210, 



fig. 159.— B. B. & E., N. A. B. iii, 1874, 214. 



c. cinereus. 



Circus cinereus, Vieill., Nouv. Diet. d'Hist. Nat. iv, 1616, 454; Enc. Meth. iii, 1213.— 



Darw., Vov. Bcag. iii, .30. — D'Okbig., Syn. Av. Mag. Zool. 1837; Voy. Am. 



Merid. 110.— Bridge.'^, P. Z. S. is, 109; Ann. Nat. Hist, xiii, 500.— Gray, Gen. 



of B. ; List B. Br. Mus. cO.— Stuickl., Orn. Syn. 1655, 254. 

 Circus cyaneus var, cinrreus, Eidgw. — B. B. & E., N. A. B. iii, 1674, 214. 

 Circus compestris, Vieill., Enc. Metb. iii, 1213. 

 Circus histrionicus, QuoY, Zool. Journ. ii, 271.— KisG, iftW. 425; Isis, 1830, 1182 ; Voy. 



Beag. i, 532.— Less., Tr. Orn. 85. 

 Falco histrionicus, QuoY, Voy. Uranie, 93, pi. 15, 16. ' 



Strigiceps histrionicus, Bp., Consp. Av. i, 1850, 35. 

 Spiziacircus histrionicus, KxL'P, Mon. Falc. Cont. Orn. 1850, 59. 



Sab. — Enrope, Asia. Var. hudsonicus throughout North America. Var. cinereus in 

 South America. 



List of specimens. 



19121- 

 19122 



160 



161 



E.F'k. Tongue E. 



Sept. 15, .1659 



G. H. Trook. 

 do 



18.00 

 22.00 



41,00 

 43.50 



14.00 

 15.50 



Lieutenant Warren's Expedition. — 5160, Cedar Island; 5101, Fort Eandall, Dakota; 

 5162, Eunning Water. 



Later Expeditions. — 59811, Colorado ; 60339-41, Wyoming; 60625, Uintah Mountains; 

 60626-7, North Platte Eiver ; 62237, Idaho. 



With this species I begin an account of our diurnal Beptores that 

 might be indefinitely prolonged were I disposed to enlarge upon " natu 

 ral aftinities" at the reader's expense. Mr. William Swainson, an ingen- 

 ious and not entirely unimaginative writer, who entertained iieculiar 

 ideas and was not fastidious in choosing the means to uphold thera, 

 found the Marsh Hawk a more attractive, if not a more profitable, sub-" 



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