340 Field Museum of Natural History — ZoOlogy, Vol. XIIL 



Piaya rutila gracilis Chapman, Bull. Am. Mus. Nat. Hist., XXXVI, 1917, p. 322 

 (Cali; Rio Frio; Malena, Colombia). 



Range: Western Ecuador and western Colombia. 

 Coccycua rutila panamensis {Todd). Panama Little Cuckoo. 



Piaya rutila panamensis Todd, Ann. Carnegie, Mus. VIII, 1912, p. 212 (Lion 



Hill, Panama). 

 Coccycua rutila panamensis Ridgway, Bull. U. S. Nat. Mus., No. 50, VII, 1916, 



p. 43 (cut, pi. Ill); Stone, Proc. Acad. Nat. Sci. Phila., 1918, p. 257 



(Gatun, Panama Canal Zone) . 



Range: Eastern Panama (Colon, Lion Hill, Canal Zone, Darien, 

 etc.). 



Coccycua rutila chaparensis" (Cherrie). Bolivian Little Cuckoo. 



Ptaya rutila chaparensis Cherrie, Bull. Am. Mus. Nat. Hist., XXXV, 1916, 

 p. 392 (Todos Santos, Rio Chapare, Bolivia). 



Range: Bolivia. 



Genus PIAYA'' Lesson. 

 Piaya Lesson, Traite d'Om., 1831, p. 139 (Type Cuculus cayanus Linnaeus). 



*Piaya cayana cayana (LinncBus). Squirrel Cuckoo. 



Cuculus cayanus LiNNiEUS, Syst. Nat., ed. 12, I, 1776, p. 170 (Cayenne). 

 Piaya cayana Lesson, Traite d'Orn., 1831, p. 140; Shelley, Cat. Bds. Brit. 



Mus., XIX, 1891, p. 373, part; Chubb, Bds. Brit. Guiana, I, 1916, p. 439. 

 Pyrrhococcyx guianensis Cabanis and Heine, Mus. Hein., IV, 1862, p. 85. 

 Piaya cayana guianensis Berlepsch, Nov. Zool., IX, 1902, p. 97 (Orinoco 



Region). 

 Piaya cayana cayana Stone, Proc. Acad. Nat. Sci. Phila., 1908, p. 497; Cory, 



Field Mus. Nat. Hist., Orn. Ser., I, 1915, p. 309; Ridgway, Bull. U. S. Nat. 



Mus., No. 50, VII, 1916, p. 47, in key; Bangs and Penard, Bull. Mus. Comp. 



Zool., LXII, No. 2, 1918, p. 49 (Paramaribo, Lelydorp and Altonaweg, 



Surinam). 



Range: Guiana, eastern Venezuela and adjacent part of extreme 

 northern Brazil (Rio Branco region, etc.). 



10: British Guiana (Georgetown) 3; Brazil (Boa Vista, Rio Branco 

 3; Base of Serra da Lua, near Boa Vista 4). 



» Coccycua rutila chaparensis (Cherrie): "Similar to P. r. panamensis Todd, 

 but darker above (nearly a liver brown) and below. The hazel or rufous brown color 

 (as in panamensis) confined to the chin and throat not extending over the breast" 

 (Cherrie, /. c). 



^ For revision of the genus, keys to species, etc., see Allen, Bull. Am. Mus. 

 Nat. Hist., 1893, p. 136; Hellmavr, Nov. Zool., 1906, p. 44; Id., 1907, p. 35; von 

 Ihering, Fauna Bras. Aves, 1907, p. 160; Stone, Proc. Acad. Nat. Sci. Phila., 1908, 

 p. 492; Dabbene, Orn. Argentine, Mus. Nat. Buenos Ayres, 1910, p. 425; Cory, 

 Field Mus. Nat. Hist. Orn., Ser., I, 1915, p. 307; Ridgway, Bull. U. S. Nat. Mus., 

 No. 50, VII, 1916, p. 45. 



