CIRCUS CYANEUS VAR. HUDSONIUS, MARSH HAWK. 327 



bentling forward till tbe breast almost touches the ground, to propound 

 the argument with more telling efitect. 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-contained, 

 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 and seek their holes on the slightest intimation of 

 danger. 



[Note. — Tbe foregoiug pages iuclude all the species of Sirigidw at present kuowu to 

 iuLabit North America, north of Mexico.] 



Family FALOONID^ : Diurnal Birds of Prey. 



CIRCUS CYANEUS var. HUDSONIUS, (Linn.) Schl 

 Marsh Hawk; Harrier. 



a. cyaneus. 



I<'a?co C2/ane?f.5, Linn., Syst. Nat. 1, 1766, 126 (Acciinfer cwriilcKfi, Edw., v, 33, pi. 225).-^ 



Rktz, Fn. Snec. 64.— Gm., Svst. Nat. i, 1788, 276.— Lath., lud. Oru. i, 1790, 39.— 



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



1815, 26 ; and of earlier authors generally. 

 Cirms ajaueiis, BoiE, Isis, 1822, 549: 1828, 306.— Less., Man. i. 105.— Flem., Br. An. 



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



1840, 31.— Schl., Rev. Crit. 1844, 6.— Gray, Gen. of B. i, 32, pi. 11, f. 1.— Goued, 



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

 Circus (Striijicepii) cyaneus, Kaup, Mus. Seuck. 1845, 258. — Gray, List Br. B. 1863, 17. 

 Bitieo cyaneus, Jenyns, Mau. Brit. Vert. An. 89. 

 Strifjiccjis cyaneus, Bp., Consp. Av. i, 1850. 35. 



Falco pyoarfius, Lks"X., Syst. Nat. i, 1766, 126 (Pyc/argus AxTiQ. ; Ace. falco torquafus, 

 ' i3Ri.ss., i, 345).— Retz., Fu. Snec. 65. — GM.,'Svst. Nat. i, 1788, 227. — Lath., Ind. 



Orn. i, 1790, 39.— Naum., V. D. i, 1822, 391, p'l. 38, 39; and of niauy authors. 

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



Cat. Br. B. 5.— Sw., Classif. B. ii, 1837, 212. 

 Strigiccps py<jur(fus, Bp., List, 1838, 5. 

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



Aceipiter maerourus, S. G. Gm., It. i, 48 ; N. C. Petrop. xv, 439, pi. 8 ; Lepech., 



It. i, .59).— Daud.. Tr. Orn. ii, 1800, 90.— Shaw, G. Z. vii, 160 {Strickland). 

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



ii, 1800, 114' 

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



laniarius albicans, Briss., i, 367). 

 Falco monlanus (3, Gm., Syst. Nat. i, 1788, 278. — Lath., Ind. Orn. i, 1790, 48 (based on 



Aec. falco viontanus cinercus, Buiss., i, 3.55). 

 Falco hohemicus, Gm., Syst. Nat. I, 1788, 279.— Lath., Ind. Orn. i, 1790, 43. 

 Falco cinercus, I'osEG., It. 29. 

 Falco ruhiqinosus, Po.seo., It. 29.— Lath., Ind. Orn. i, 1790, 27. — D.VUD., Tr. Orn. ii, 1800, 



167.— Shaw, G. Z. vii, 170. 

 Falco ranivorus, Lath., Ind. Orn. Snppl. ii, 7 (Strickland). 

 Falco sirifficeps, NiLSS., Orn. Snec. i, 21. 

 Circus yairniarius, Savi., Doscr. Egyp. i, 91.— Less., Tr. Orn. 84. — Vieill., Nouv. Diet. 



' d'llist. Nat. iv, 459; Fn. Franc. 26, pi. ii, f. 1,2. 

 Circus vurii flatus, Viehj.., Nouv. Diet, d'llist. Nat. iv, 466 ; Enc. Mcth. iii, 1216. 

 Circus (iiiilliits, Leach, Oat. 1816, 9. 

 Circus cinereus, Bp.kiim, V. D. 94 ; Isis. 1S32, 843. 

 Aceipiter rarialnlis, I'aee., Zoog. R. A. i, 364. 

 Pijgaryus dispar, KocH., Syst. Baier. Zool. 128. 



b. hudsoniuH. 



Falco hudsonius, Lixx.. Syst. Nat. i, 176<>, 128 {Py(jaryus canadensis, Enw., 107 ; Aceipiter 

 freli-iiudsonis, BiHSS., vi, App. 18). — Gm., i, 1788,277. — Dau1>., Tr. Oru. ii, 173. — 

 Shaw, Gen. Zool. vii, 165 



