344 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. XIII. 



(?) Piaya circe BONAPARTE, Consp. Av., I, 1850, p. no ("Colombia"; loc. errore 



= Paraguay)." 



Range: Paraguay, southern Brazil (at least north to Minas Geraes) 

 and northern Argentina. 



2: Brazil b (Lagoa Santa, Minas Geraes i); Argentina" i. 



*Piaya cayana thermophila (Sdater). CENTRAL AMERICAN SQUIRREL 

 CUCKOO. 



Piaya ihermophila SCLATER, Proc. Zool. Soc. Lond., 1859, p. 368 (Jalapa, Vera 

 Cruz, Mexico). 



Piaya cayana thermophila RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VII, 1916, 

 p. 51; STONE, Proc. Acad. Nat. Sci. Phila., 1918, p. 257 (Toro Point, Pana- 

 ma Canal Zone) . 



Piaya cayana mehleri NUTTING, Proc. U. S. Nat. Mus., V, 1882, p. 401; STONE, 

 Proc. Acad. Nat. Sci. Phila., 1908, p. 499; CARRIKER, Ann. Carnegie Mus. 

 VI, 1910, p. 565 (Costa Rica). 



Range: Panama to southeastern Mexico. 



tso: Mexico and Central America (Yucatan 2; British Honduras i; 

 Tolbox Island i; Mugeres Island i; Tampico 2; San Luis Potosi i; 

 Costa Rica 1 2 ; Nicaragua 6 ; Guatemala 6) . 



*Piaya mexicana (SwainsonY . MEXICAN SQUIRREL CUCKOO. 



Cuculus mexicana SWAINSON, Philos. Mag. N. H., I, 1827, p. 440 (Temascaltepec, 



Mexico). 

 Piaya mexicana SCLATER, Proc. Zool. Soc. Lond., 1859, p. 388 (Oaxaca), crit; 



SALVIN and GODMAN, Biol. Centr.-Am., Aves, II, 1896, p. 531; RIDGWAY, 



Bull. U. S. Nat. Mus., No. 50, VII, 1916, p. 51. 

 Piaya cayana mexicana STONE, Proc. Acad. Nat. Sci. Phila., 1908, p. 498. 



Range : Southwestern and western Mexico. 

 7: Mexico (Jalisco and Colima). 



*Piaya melanogaster melanogaster ( Vieill.}. BLACK-BELLIED CUCKOO. 

 Cuculus melanogaster VIEILLOT, Nouv. Diet. d'Hist. Nat.. VIII. 1817, p. 236 

 (Java, errore ! = Cayenne ). 



Cf. Cabanis and Heine, Mus. Hein., IV, 1862, p. 87. 



b Specimens from Paraguay, northern Argentina, and extreme southern Brazil, 

 are apparently larger and have a longer tail than birds from farther north. Two 

 specimens from Paraguay measure: wing 170, tail 364; and wing 166, tail 335 mm. 

 An adult male from Lagoa Santa, Minas Geraes measures: wing, 148, tail 292 mm. 

 The coloration, however, is apparently the same, and the differences may be in- 

 dividual. 



The single specimen from Argentina is brighter above and has the under 

 surface of the rectrices decidedly tinged with rusty. These difference may be in- 

 dividual or may represent regional characters of subspecific value. 



d Ridgway considers this form to be worthy of specific rank (/. c., footnote, p. 

 46). 



Cayenne, substituted by Hellmayr (Abh. K. Bayer. Akad. Wiss., Munchen, 

 XXII, 1906, p. 600). 



