CIRCUS CYANEUS VAE. HUDSONIUS, MAESH HAWK. 327 



bending forward till the breast almost touches the ground, to propound 

 the argument with more telling effect. Then they face about to address 

 the rear, that all may alike feel the force of their logic; they draw them- 

 selves up to their fullest height, outwardly calm and self-contaiued, 

 pausing in the discourse to note its effect upon the audience, and collect 

 their wits for the next rhetorical flourish. And no distant likeness be- 

 tween these frothy orators and others is found in the celerity with 

 which they subside ^nd seek their holes on the slightest intimation of 

 danger. 



[Note. — The foregoing pages include all the species of Strigidw at present known to 

 inh.abit North Aiperica, north of Mexico.] 



Family FALCONID^ : Diurnal Birds of Prey. 



CIEOUS OYANBUS var. HUDSONIUS, (Linn.) Schl 

 Marsh Hawk; Harrier. 



a. cyaneus. 



Falco cj/aveus, Linn., Syst. Nat. i, 1766, 126 (Accipiter mn-ulcus, Edw., v, 33, pi. 225).— 

 Eetz, Fn. Suec. 64.— Gm., Syst. Nat. i, 1788, 276.— Lath., Ind. Orn. i, 1790, 39.— 

 Daud., Tr. Orn. ii, 1800, 174.— Shaw, Gen. Zool. vii, 163.— Temm., Man. Orn. 

 1815, 26 ; and of earlier authors generally. 

 Circus cyantiis, BoiE, Isis, 1822, 549: 1828, 306.— Less., Man. i, 105.— Feem., Br. An. 

 53.— Macgil., Rap. Br. B. 298 ; Hist. Br. B. iii, 366.- Keys &. Blas., Wirb. Eur. 

 1840, 31.— Schl., Rev. Grit. 1844, 6.— Gray, Gpu. of B. i, 32, pi. 11, f. 1.— Gould, 

 B. Eur. pi. 33.— Breioi, V. D. 93 ; Isis, 1832, 839 ; and of late authors generally. 

 Circus (Strigiceps) cijaneys; Kaup, Mus. St-uck. 1845, 258.— Geay, List Br. B. 1863, 17. 

 JBiiieo cyancns, .Jenyns, Man. Brit. Vert. An. 89. 

 SMglccps cyaneus, Bp., Cousp. Av. i, 1850, 35. 



Falco pygargus, Linn., Syst. Nat. i, 1766, 126 (Pygargus Antiq. ; Ace. falco torquatus, 

 Briss., i, 345).— Eetz., Fn. Suec. 65.— Gm., Syst. Nat. i, 1788, 227.— Lath., Ind. 

 Orn. i, 1790, 39.— Nauji., V. D. i, 1822, 391, pi. 38, 39 ; and of many authors. . 

 Circus pygargus, Cuv., E. A. i, 1817, 324.— Steph., Shaw's G. Z. xiii, pt. ii, 41.— Eyt., 



Oat. Br. B. 5.— Sw., Olassif B. ii, 1837, 212. 

 Strigiceps pygargzis, Bp., List, 1838, 5. 



Falco macro'urus, Gm., Syst. Nat. i, 1788, 269.— Lath., Ind. Orn. i, 1790, 29 (based on 

 Accipiter macrourus, S. G. Gsi., It. i, 48 ; N. C. Petrop. sv, 439, pi. 8 ; Lepech., 

 It. i, 59).— Daud., Tr. Orn. ii, 1800, SO.— SriAW, G. Z. vii, 160 (Striclcland). 

 Falco griseus, Gil., Syst. Nat. i, 1788, 275.— Lath., Ind. Orn. i, 1790, 37.— Daud., Tr. Orn. 



ii, 1800, 114. 

 Falco albicans, Gji., Syst. Nat. i, 1788, 276.— Lath., Ind. Orn. i, 1790, 38 (based on Ace. 



laniarius albicans, Briss., i, 367). 

 Falco montanus /3, Gii., Syst. Nat. i, 1788, 278.— Lath., Ind. Orn. i, 1790, 48 (based on 



Aec. falco vwntanus cinereus, Beiss., i, 355). 

 Falco boliemicus, G.M., Syst. Nat. i, 1788, 279.— Lath., Ind. Orn. i, 1790, 43. 

 Falco eine)-eus, PosEG., It. 29. 

 Falco rubiginosus, PosEG., It. 29.— Lath., Ind. Orn. i, 1790, 27.— Daud., Tr. Orn. ii, 1800 



167.— Shaw, G. Z. vii, 170. 

 Falco ranivorm, Lath., Ind. Orn. Snppl. ii, 7 {Striclcland). 

 Falco strigiceps, NiLSS., Orn. Suec. i, 21. 

 Circus gallinarius. Save, Descr. Egyp. i, 91.— Less., Tr. Orn. 84.— Vieill., Nouv. Diet 



d'Hist. Nat. iv, 459; Fn. Franf. 26, pi. ii, f. 1,2. 

 Circus variegatus, Vieill., Nouv. Diet. d'Hist. Nat. iv, 466 ; Enc. Meth. iii, 1216. 

 Circus agithus, Leach, Cat. 1816, 9. 

 Circus cinereus, Brehm, V. D. 94 ; Isis, 1832, 843. 

 Accipiter variabilis, Pall., Zoog. E. A. i, 364. 

 Pygargus dispar, Koch., Syst. Baier. Zool. 128. 



b. hudsonius. 



Falco hudsonius, Linn., Syst. Nat. i, 1766, 128 (Pygargus canadensis, Edw., 107 ; Accipiter 

 freti-hndsonis, Briss., vi, App. 18).^Gm., i, 1788, 277.— D.iUD., Tr. Orn. ii, 173.— 

 Shaw, Gen. -Zool. vii, 165 



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