BIRDS OF NORTH AND MIDDLE AMERICA 109 



Centr.-Amer., Aves, iii, 1901, 102, part (from Guatemala s. to Bolivia and 

 upper Amazon). — Berlepsch and Stolzmann, Proc. Zool. Soc. London, 

 1902, 43 (Garita del Sol, Peru). 



Regerhinus uncinatus megarhynchus Swann, Synopt. List Accip., pt. 3, 1920, 100 

 (e. Peru). 



Cyinindus megarhynchus Gray, Hand-list, i, 1869, 28, No. 254. — Sclater and 

 Salvin, Nom. Av. Neotr., 1873, 122 (upper Amazon). 



Cymindis megarhynchus Taczanowski, Proc. Zool. Soc. London, 1879, 242 

 (Guajango, Peru; crit.; descr.). 



Leptodon megarhynchus Sharpe, Cat. Birds Brit. Mus., i, 1874, 332 (Peru; Bo- 

 livia). — Sharpe, Hand-list, i, 1899, 269 (Peru). — Lillo, Rev. Letras y Cienc. 

 Soc, iii, 1905, 62 (forests of Tafi Viejo, Tucumiln, Argentina).— Dabbene, 

 Orn. Argent., 1910, 248 (Tucuman) ; Bol. Soc. Physis Buenos Aires, i, 1913, 

 303 (Tucumdn). — Brabourne and Chubb, Birds South Amer., i, 1912, 71 

 (e. Peru). 



Chondrohierax uncinatus megarhynchus Bangs and Noble, Auk, xxxv, 1918, 445 

 (Bellavista, Peru; crit.). 



Chondrohierax megarhynchus Swann, Synop. Accip., pt. 3, 1922, 157 (Bolivia, e. 

 Peru, and Andes of Venezuela). — Dabbene, El Hornero, iii, 1926, 391 

 (Tucumdn, Argentina).— Peters, Check-list Birds of World, i, 1931, 200.— 

 Anonymous, El Hornero, vi, 1935, 184 (Central and South America). — 

 Steullet and Deautier, Obra del Cincuentenario Mus. La Plata, i, 1936, 

 395 (syn.; Argentine records; distr.). 



Cymindis pucherani Leotaud, Ois. Trinidad, 1866, 40 (Trinidad; =blackish 

 phase).— Sclater, Ibis, 1867, 107 (crit.).— Gray, Hand-list, i, 1869, 28, 

 No. 256.— FiNSCH, Proc. Zool. Soc. London, 1870, 557 (Trinidad; crit.). 



Cymindis boliviensis Burmeister, Proc. Zool. Soc. London, 1868 (publ., April 1, 

 1869), 633 (Santa Cruz de la Sierra, Bolivia).— Gray, Hand-list, i, 1869, 28, 

 No. 257. 



CHONDROHIERAX UNCINATUS AQUILONIS Friedmann 



Mexican Hook-billed Kite 



Adult male. — Similar to the gray phase of C. u. uncinatus, but 

 darker, especially on the underparts, which are blackish plumbeous 

 instead of deep plumbeous, and with the white ventral bars broader 

 (about 4-6 mm. wide as against 1.5-3 mm. in uncinatus). Melanistic 

 phase not distinguishable from that of the nominate race. 



Adult female . — Similar to the darker, russet or amber-brown barred 

 individuals of the brown phase of C. u. uncinatus. 



Juvenal.- — Similar to that of C. u. uncinatus. 



Natal down. — Not known. 



Adult male.—SMng 279-301 (290.9); tail 186-210 (199); culmen 

 from cere 29-42 (35.9) ; tarsus 32-36 (35) ; middle toe without claw 

 28-34.5 (31 mm.) \Jo specimens). 



Adidt female.— l^^'mg 275-307 (292.7); tail 191-214 (204.5); culmen 

 from cere 30.5-43.5 (35.9); tarsus 31-36 (33.2); middle toe without 

 claw 28-34 (30 mm.) (6 specimens). 



Range. — Resident in most of Mexico from Tamaulipas to Jalapa, 

 Guanajuato, Jalisco, Oaxaca, Yucatdu, and Chiapas (Finca Jalapa). 



