214 NORTH AMERICAN BIRDS. 



Tail and secondaries with a sublerminal band of dusky ; lower parts 

 with rufous markings. 



Wing, 12.90 - 16.00 ; tail, 9.00-10.50 ; culmen, .65-. 75; tarsus, 

 2.90-3.25; middle toe, 1.20-1.55. Lower parts with scattered 

 irregular specks, or small cordate spots, of reddish-rufous. Hah. 



North and Middle America vox. hudsonius. 



Wing, 12.40 - 14.50 ; tail, 8..50- 10:50; culmen, .62 - .81 ; tarsus, 

 2.42-3.00; middle toe, 1.20-1.50. Lower parts with numerous 

 regular transverse bars of veddish-rufous. Hab. South America. 



var. ciner eus} 



Circus cyaneus, var. hudsonius (Lix>f.). 



MARSH HAWK ; AMEKICAN HAREIER. 



Falco hudsonius, LiNX. Sj-st. 'SaX. p. 12S, 17tiO. — G.mel. yyst. Nat. p. 277, 1789. — Lath. 

 Syn. I, 91, sp. 76, 17S1 ; Gen. Hist. I, p. 97, sp. C. 1S21. — Daud. Tr. Orn. II, 173, 

 1800. — Shaw, Zool. VII, 165, 1809. Circus hudsonius, Vieill. Ois. Am. Sept. jjl. 

 ix, 1807. —Cass. B. Gal. & Te.\. p. 108, 1834 ; Birds N. Am. 1S.')8, p. 38. — Heeum. 

 P. R. R. Rep't, 11, 33, 1855. — Kennerly, P. R. R. Rep't, 111, 19, 1856. — Newb. 

 P. R. R. Rep't, VI, 74, 1857. — Coop. & Suck. P. R. R. Rep't, Xll, ii, 150, I860.— 

 Stkickl. Om. Syn. I, 150, 1855. — CouES, Prod. B. Aiiz. 13, 1866. — Blakist. Ibis, 

 1861, 319. — Lord, Pr. R. A. I. \Y, 1864, 110 (Brit. Coll.). Circus ojancus hudsonius, 

 ScHLEO. Mus. Pays-Bas, Circi, 2, 1862. Circus cyaneus, var. hudsonius, (Ridgway) 

 CouES, Key, 1872, 210. — Gray, Hand List, I, 37, 1869. Strigiceps hudsonius, Bonap. 

 Consp. Av. p. 35, 1850. FaJco spadicens, Gmel. Syst. Nat. j). 273, 1789. — Forst. 

 Phil. Trans. LXII, 383, 1772. Falco buffoni, Gmel. Syst. Nat. p. 277, 1789. — L.\th. 

 Gen. Hist. I, 98, D, 1821. Falco ulicjinosjis, Gmbl. Syst. Nat. p. 278, 1789. — Lath. 

 lud. Orn. p. 40, 179 ; Syn. I, 90, 1781 ; Gen. Hist. I, 271, 1821. — Daud. Tr. Orn. 

 II, 173, 1800. — WiLs. Am. Orn. pi. li, f. 2, 1808. —Sab. App. Frankl. E.-cp. p. 671. 

 Circus uliginos^is, Vieill. Ois. Am. Sept. I, 37, 1807. — DeKay, Zool. N. Y. II, 20, 

 pi. iii, figs. 5, 6, 1844. —James. (Wils.) Am. Orn. I, 88, 1831. —Max. Cab. .Toum. 

 VI, 1858, 20. Strigiceps uliginoszis, Boxap. Eur. & N. Am. B. p. 5, 1838. — Kaup, 

 Monog. Falc. Cont. Orn. 1850, p. 58. Falco cyaneus & ;3. Lath. Ind. Orn. p. 40, 1790 ; 

 Syn. I, 91, 7sp. 6 A. — Shaw, Zool. VII, 164, 1809. Falco cyaneus, AuD. B. Am. pi. 

 ccclvi, 1831. —James. (Wils.) Am. Orn. IV, 21, 1831. — Boxap. Am. Orn. pi. 12 ; 

 Ann. Lye. N. Y. II, 33 ; Isis, 1832, p. 1538. — Peab. B. Mass. p. 82, 1841. Circjis 

 cyaneus, Boxap. .\nn. Lye. N. Y. p. 33. — Jard. (Wils.) Am. Orn. II, 391. — Rich. 



Measurements.— $. AVing, 12.50-13.25 ; tail, 9.00-9.30; cubnen, .60-. 70 ; tarsus, 2.75- 

 2.90; middle toe, 1.10-1.25. Specimens, S. 9. Wing, 13.50-15.00; tail, 9.50-10.70 ; cul- 

 men, .75 ; tarsus, 2.70-2.85 ; middle toe, 1.25-1.35. Specimens, 4. 



Observations. — The adult female of cyaneus is distinguishable from that of hudsonius by lighter 

 colors and less distinct ochraceous blotches on the shoulders. 



1 Circus cyaneus, var. cinereus (Vieill.). Circus cincrcus, Vieill. Nouv. Diet. H. N. IV, 

 1816, 454. — Darwin, Zool. Beag. pt. iii, 30. — D'Orb. Synop. Av. Mag. Zool. 1837. — Strickl. 

 Om. Svn. I, 156. — Gr.^y, Hand List, I, 37, No. 368. Circus campcstri':, Vieill. Enc. Mcth. 

 Ill, 1823, 1213. Circus frenatus, Licet. Verz. Doubl. 1823, p. 62. Circus histrionicus, QuoY, 

 Zool. Journ. Ill, 1826, 271. 



Specimens examined. — Nation.al Museum, 7 ; riiiladiliihia Academy, 5 ; Boston Society, 3 ; 

 Museum Cambridge, 1 ; Cab. G. N. Lawrence, 1. Total, 17. 



Measurements. — g. Wing, 12.40-13.25 ; tail, 8.50-9.00 ; culmen, .62-. 63 ; tarsus, 2.42- 

 2.60; middle toe, 1.20-1.25. Specimens, 11. 9. Wing, 13.75-14.50; tail, 9.30-10.50; 

 culmen, .75-. 80 ; tarsus, 2.80-3.00 ; middle toe, 1.40-1.50. Specimens, 5. 



