166 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Bull. Mus. Comp. Zool., Ixxxviii, 1941, 112 (Lower Amazonia; Santar^m; 

 spec). — Traylor, Publ. Field Mus. Nat. Hist., zool. ser., xxiv, 1941, 202 

 (Chichen Itzd, Yucatdn; spec). — Gyldenstolpe, Kungl. Svenska Vet. 

 Akad. Handl., xxii, No. 3, 1945, 26 (Rio Jurud, w. Brazil; spec. crit.). 



Nisus pilealus b. var. hicolor Ridgwat, Proc. Boston Soc Nat. Hist., xvi, 1873, 

 59 (Cayenne). 



Nisus hicolor Ridgway, Bull. U. S. Geol. and Geogr. Surv. Terr., ii, No. 2, 1876, 

 107, part (Panama Railway and Chiriqui, Panama; Turrialba, Sipurio, and 

 San Jose, Costa Rica; Guiana; Cayenne; monogr.). — Ihehing and Ihering, 

 Aves Brazil, 1907, 88, part (Amazonia). 



Nisus pileatus Tschudi, Unters. Fauna Peru, Orn., 1846, 100, part (wooded 

 areas of Peru). — Schlegel, Mus. Pays-Bas, Astures, 1862, 35, part (Caracas, 

 Venezuela) . 



Accipiter pilealus (not Falco pileatus Temminck) Sclater, Proc. Zool. Soc. London, 

 1860, 72, 298 (Ecuador). — Lawrence, Ann. Lye Nat. Hist. New York, 

 vii, 1861, 289 (Panama; crit.); ix, 1868, 134 (San Jose, Dota, and Turrialba, 

 Costa Rica). — Salvin, Ibis, 1861, 355, part (Vera Paz, Guatemala). — 

 Franizius, Journ. fiir Orn., 1869, 309 (Costa Rica). — Gray, Hand-list, i, 

 1869, 33, No. 315, part. — Taczanowski, Proc. Zool. Soc. London, 1882, 

 47 (Huambo, Peru); Orn. Perou, i, 1884, 166 (Peru). — Berlepsch and 

 Stolzmann, Proc. Zool. Soc. London, 1902, 42 (La Merced, Peru). — Lonn- 

 berg and Rendahl, Ark. Zool., xiv. No. 25, 1922 (near Gualen, Ecuador). — 

 Chapman, Bull. Amer. Mus. Nat. Hist., Iv, 1926, 225 (Ecuador). 



Nisus variatus Lesson, Trait6 d'Orn., 1830, 61 (Cayenne). — Pucheran, Rev. 

 Mag. Zool., ii, 1850, 6, 210 (crit. on type). 



Accipiter sexfasciatus Swainson, Auim. in Menag., 1838, 282 (Guiana). — Cabanis, 

 Journ. fur Orn., 1869, 208, part (Costa Rica). 



Nisus sexfasciatus Cabanis, in Schomburgk's Reis. Brit. Guiana, iii, 1848, 736. 



Astur sexfasciatus Lichtenstein, Nom. Av. Mus. Berolinensis, 1854, 4. 



Micrastur dynastes Verreaux, in Bonaparte's Notes Orn., 1854, 4. 



Rhynchomegus dynastes Bonaparte, Notes Orn., 1854, 4; Rev. Mag. Zool., vi, 

 1854, 537. 



Accipiter erythrocnemis (not A. erythronemia Gray) Scl.-iter, Proc. Zool. Soc. 

 London, 1860, 96. 



Accipiter hicolor schistochlamys Hellmayr, Bull. Brit. Orn. Club, xvi, 1906, 82 

 (spec, from Cachabi, nw. Ecuador, Chiriqui and Panama); Nov. Zool., 

 xiii, 1906, 382, part (Chiriqui; Panama).— Bangs, Auk, xxiv, 1907, 290 

 (Boruca and Pozo del Rio Grande, Costa Rica). — Carriker, Ann. Carnegie 

 Mus., vi, 1910, 455 (Santa Maria de Dota, Pozo Azul de Pirris, El Hogar, 

 Boruca, and Buenos Aires, Costa Rica; habits). — Peters, Auk, xxx, 1913, 

 370 (Xcopen, Quintana Roo, Mexico); Check-List Birds of the World, i, 

 1931, 217 (w. Ecuador). — Lonnberg and Rendahl, Ark. Zool., xiv. No. 25, 

 1922, 36 (Alonguinche, s. of Mojando, Ecuador, 9,000 feet; near Gualea, 

 5,000 feet; crit.).— Swank, Monogr. Birds of Prey, i, 1926, 333 (monogr.). 



ACCIPITER BICOLOE FIDENS Bangs and Noble 



Mexican Bicolored Hawk 



Adult male. — Larger and darker than that of ^. b. hicolor. Upper- 

 parts blackish slate to slate color. Underparts dark gull gray to 

 slate-gray. 



Adult Jemale . — Similar to the male, but larger. 



