107 



5 S.OO; culmen, 0.52; tarsus, 2.45; middle 



Wing, 



rufous on the tibiae; crissum immaculate, but all other parts marked 

 with brown, the bieast, side, and abdomen having lanceolate streaks of 

 clear dark brow^i, and the tibiiie having large transverse spots of lighter 

 brown, mixed with rufous ; throat with a medial series of narrow dusky- 

 streaks. Wing, 8.30; tai" 

 toe, 1.40. 



Adult female (No. 32,974, 'Nut. Mus.) : — Exactly like the male. 

 9.S5; tail 8.80; culmen, 0.00 ; tarsus, 2.80; middle toe, 1.70. 



The sexes differ in measurements as follows : — 



Males: Wing, 8.25-8.30; tail, 7.G5-S.00; culmen, 0.50-0.53; tarsus, 

 2.25-2.45; middle toe, 1.40. 



Females: Wing, 8.00-9.85; tail, :.50-8.80; culmen, 0.00-0.02; tarsus, 

 2.05-2.80 ; middle toe, 1.70. 



List of specimens in United States National Museum. 



:f29 



3-2978 



4C827 



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r3 



a 



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O 



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Q 









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i(i 



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Locality. 



When col- 

 lected. 



Chile 



...ilo 



Chile, Valdivia June — , 1864 



From whom received. 



Verreau.'c 



...do 



3Srat.Mus. Chile. 



NISUS BICOLOR. 



Span-las hicoJor Vieili.. N. D. s. 1817, 325 ; Euc. Meth. iii, 1S23, 12G5.— Puciier. R. 

 Z. 1850, 9>^. 

 Coopcrastiir Mcolor Bonap. Rev. ct Mag. Zool. 1854, 538. 



Jcxiijnter Mcolor Stkickl. Orn. S.yn. i, 1855, 110.— Scl. & S.vlv. P. Z. S. 1869, 252 

 (Maniria, Venezuela); E.k. Oru. ix, 18B9, 137, pi. Ixix; ib. xi, 170; P. Z. S. 

 1870, 838 (coast of Houduras); P. Z. S. 1870, 787 (Venezuela); Norn. Neotr. 

 1873, 120.-GRAY, Hand List, i, 1809, 33.— Salyix, P. Z, S. 1870, p. — (Veragua). 

 — Shakpe, Cat. Ace. B. M. 1874, 154. 

 Nisus Mcolor Giebel, Thes. Orn. 1872, 2(53. 



JVisiis pileafns var. Mcolor Ridgw. Pr. Boston Soc. N. H. May, 1873, 89. 

 Kisus variatus Less. Tr. 1831, 01.- Pucher. R. Z. 1850, 6, 210. 

 Jccipiter sexfasciatus Swains. Au. Menag. 1837, 282. 



Nisus sexfascialns Cabax. Scboml). Reis. Gulan. iii, 1848, 736. 

 Astur sexfasciatits Light. Nonienel. Av. 1854, 4. 

 Micraxtur dynastes Verreau.x, in Bonap. Notes Orn. 1854, 4.1 



liliijnchomegiis dynastes Bonai*. Notes Orn. 1854, 4. 

 Accijyiler erythrocncmis Scl. P. Z. S. 1800, 96 (not of Gray, 1848). 



Accipiter pUeatiis Salyin, Ibis, 1861, 354 (S. Mexico and Guatemala) ; ib. 1869, p. — 

 (Costa Rica). — Lawrence, Auu. N. Y. Lye. 1868, 134 (Costa Rica). 

 • 

 Eah. — Central District of Tropical America, from Southern Mexico to 

 Ecuador and Guiana. Nicaragua, Costa Rica, and Surinam (Phila. 

 Acad); Costa Kica, Veragua, and Panama (Nat. Mus.); Cayenne 

 (Boston Soc). 



Wing, 8.00-10.00 ; tail, 7.20-8.80 ; culmen, 0.55-0.75 ; tarsus, 2.25-2.70 ; 

 middle toe, 1.45-1.80. Fourth and fifth quills longest; first shortest; 

 outer five with inner webs emarginated. Tail slightly rounded. 



Adult: — Pileum, plumbeous-black. Tibiic bright cinnamon-rufous; 

 lining of the wing white, usually mixed with grayish, or with darker 

 shaft-streaks, and sometimes tinged with rufous along the outer border of 

 the wing. Crissum white, sometimes tinged with grayish or rufous. 

 Tail black, crossed by three to four narrow bands of dull plumbeous or 

 slate, these indistinct on the upper surface, whitisU underneath. Inner 



