FALCONID.E — THE FALCONS. 229 



barred than in the other race?. Young with narrower bueaks 

 beneath. Wing, 1 1.1.5 - 12.G0 ; tail, G.U - 8.00 ; cuhuen, .81 - 

 .90; tarsus, l.GO-2.05; middle toe, 1.75-2.1.5. Hah. Aus- 

 tralia var. melanogenys} 



b. Young unvariegated brownish-black above. Beneath brownish- 

 black, fointly streaked with white, or nearly unvariogated. Inner webs 

 of tail-feathers without transverse bar.s. 



Wing, 14.90-15.09; tail, 8.50: culmen, .95-1.00; tarsus, 



2.10; middle toe, 2.15-2.21. Hab. Northwest coast of 



North America, from Oregon to Sitka . . . var. pea lei. 



B. Second quill longest; first with inner web emarginated, the second with 



inner web not sinuated. Young without longitudinal stripes on lower parts. 



Adult and young stages hardly appreciably diflerent. 



Above plumbeous or black; beneath black from the jugidiun to the tibise, 

 with transverse bars of white, ochraceous, or rufous ; throat and jugulum 

 white, white and rufous, or wholly ochraceous, with a semicircular outline 

 posteriorly; tibise, anal region, and crissum uniform deep rufous, or spotted 

 with black on an ochraceous or a white and rufous ground. Adult. Plum- 

 beous above, the feathers darker centrally, and with obscure darker bars 

 posteriorly ; jugulum immaculate. Young. Black above, the feathers 

 bordered terminally with rusty, or else dark plumbeous without transverse 

 bars; jugulum with longitudinal streaks. 



2. F atirantius.^ Wing, 9.50 - 12.00 ; tail, 5.40 - G.25 ; culmen, .9G ; 



1 Falco conimunii, var. mdanogenijs (Gould). Falco communis, L.vth. New S. Wales Dr. 

 II, No. i. Falco pere(jnmis, Via. Linn. Trans. XV, p. 183. —1b. Isis, 1S30, 260. — Bo.x.'VP. 

 Consp. 23, No. 2. Falco mclanogenys, Goui.D, P. Z. S. pt. 5, 1837, 139. — Ib. Synop. B. Austr. 

 pt. 3, pi. xl, fig. 2; Birds of Austr. I, pi. 8 ; Intr. B. Austr. 19. — Gray, Gen. B. fol. sp. 6. — 

 Ib. List. B. Brit. Mus. 51. — Bonap. Rev. Zobl. 1850, 484. — Kaup, Monog. Falc. in Jardiue's 

 Contr. Orn. 1850, 56. — Sturt, E.xp. Austr. App. 14. — Stp.ickl. Orn. Syn. I, 1855, 84.— 

 Gp.ay, Hand List, 1, 1S69, 19, No. 167. Falco macropus. Swains. An. Menag. 1838, 341. 

 Eight speciiueus examined, including the types of Gould's figiu-es and descriptions in the Birds 

 of Australia. 



^ Falco aurantius, Gmel. (Rufous-bellied Falcon). Falco auranfius, Gmel. Syst. Nat. p. 

 283, 1789. — Lath. hid. Om. p. 48, 1790, Gen. Hist. 1, 289. — Daud. Tr. Orn. II, 130.— 

 Shaw, Zoiil. VII, 194. — Steph. Zobh XIII, ii, 40. — Cuv. Reg. An. (ed. 2), 1, 322. —Less. 

 Tr. Orn. p. 91. Bo.n'ap. Consp. Av. p. 25. — Stkickl. Orn. Syn. 1, 89, 1855. Hypolriorchis 

 aurantius, Kaup, Ueb. Falk. Mus. Seiick. p. 257, 1845. Bidens aurantius, Spix, Av. Bras. I, 

 17, 1824. Falco dcirolcucus, Tem.m. PI. Col. 348, 1836. — Less. Man. Orn. I, 79. — Gi:ay, 

 List B. Brit. Mus. 1844, p. 25; Gen. B. fol. sp. 12. — BoNAP. Rev. Zool. 1S50, 486. Falco 

 rufiijularis (not of Daudin !) Gray, List B. Brit. Mus. p. 54, 1844. 



Sp. Char. Adult {$, Costa Rica ; Coll. G. N. Lawrence). Above bluish-plumbeous, the 

 feathers darker centrally ; anteriorly the black increases in extent, first leaving the plumbeous 

 only as a border to the feathers, and then dropping it altogether, the head and nape being plain 

 black ; posteriorly the plumbeous predominates, and shows a tendency to form transverse bare. 

 On the head and neck tlie black occupies the whole upper and lateral portions, reaching down to 

 tlie throat, involving th(! whole of the cheeks and maxilla;, which it covers in an angidar patch. 

 Primaries and tail deep black ; the former immaculate on their outer surface ; the latter crossed 

 by six (the last terminal) incomplete very narrow bands of pure wdiite, formed by transverse bars, 

 which touch neither the shaft nor edges of the feathers ; upper tail-coverts crossed by about two 

 bars of pure white. Immaculate area of the throat and jugulum deep rufous j)ostcriorly and 

 laterally, pure white anteriorly and centrally ; from the jugulum to the tibice, and including the 

 entire lining of the wing, continuous black, with tran.sverse bars of white ; tibi;e plain rufous; 

 crissum niLxed rufous and white, — the former predominating, — and thickly marked with large 



VOL. III. 17 



