BIRDS OF NORTH AND MIDDLE AMERICA. 47 



6. Flanks and anal region pale gray, the under tail-coverts deeper gray; pileum 

 deep brown. (Guianas, Venezuela, etc.). 



Piaya cayana cayana (extraUmital)." 



66. Flanks and anal region blackish slate to black; pileiini light brown or vinaceous- 



brown. 



c. Posterior under parts black, in abrupt contrast with gray of more anterior 



portion, the black involving whole of flanks and lower abdomen; pileum 



darker, nearly concolor with back. (Western Colombia to western Peru.) 



Piaya cayana caucae (extralimital).& 

 cc. Posterior under parts blackish slate, gradually fading into gray of abdomen, 

 etc. ; color of pileum lighter, more \anaceous, brown, quite different from 

 chestnut or bay of back. (Panama to southeastern Mexico.) 



Piaya cayana thermophila (p. 47). 

 aa. Under surface of rectrices (except white tips and sharplj- defined subterminal 

 black band or space) cinnamon-rufous or rufous- tawny; upper parts cinnamon- 

 rufous to chestnut-rufous; under parts of body much paler gray. 

 6. Larger and lighter colored, the under surface of rectrices clear rufous-tawny, in 

 abrupt contrast with black subterminal areas; back, etc., much lighter (clear 

 rufous- tawny). (Southwestern and western Mexico.) 



Piaya mexicana (p. 51). 

 66. Smaller and darker, the under surface of rectrices dull cinnamon-rufous or hazel, 

 in less abrupt contrast with black subterminal areas; back, etc., chestnut- 

 rufous. (Eastern Colombia to Venezuela.).. Piaya columbiana (extralimital).c 



PIAYA CAYANA THERMOPHILA (Sclater). 



CENTRAL AMERICAN SQUIRREL-CTJCKOO. 



Similar to P. c. cayana ^ but white tips to rectrices broader, color 

 of upper parts (especially the pileum) lighter, and color of under 

 parts decidedly darker, the under tail-coverts blackish slate instead 



O' [Cuculus\ cayanus Linnaeus, Syst. Nat., ed. 12, i, 1766, 170 (Cayenne; based on 

 Cuculus cayennensis Brisson, Orn., iv, 122). — [Coccyzus] cayanus Temminck, Tabl. 

 M6th., in PL Col., 1839, 53.— Piat/a cayana Lesson, Traill d'Orn., 1831, 140; Shelley, 

 Cat. Birds Brit. Mus., xix, 1891, 373, part. — Pyrrhococcyx cayanus Cabanis, Joum. 

 fiir Orn., 1862, 169 (crit.). — P[yrrhococcyx] cayanus Cabanis, Mus. Hein., iv. Heft 1, 

 1862, 86, footnote (crit.). — Cuculus cayanensis Swainson, Classif. Birds, ii, 1837, 323. — 

 Cuculus caijanus Temminck, Cat. Syst., 1807, 57. — Piaya cayana (typica) Allen, Bull. 

 Am. Mus. N. H., v, July, 1893, 139 (geog. range). — Piaya cayana cayana Hellmayr, 

 Novit. Zool., xiii, Feb., 1906, 43 (crit.). — Coccyzus macrocercus Vieillot, Nouv. Diet. 

 d'Hist. Nat., viii, 1817, 275 (Guiana; cites Cuculus cayanus Latham and Pl.Enl., 211). 



& Piaya cayana caucx Stone, Proc. Ac. Nat. Sci. Phila., 1908, 499 (Rio Cauca, w. 

 Colombia; coll. Am. Mus. N. H.). 



This form is closely related to P. c. nigricrissa (Piaya nigricrissa Sclater, Proc. Zool. 

 Soc. Lend., 1860, 285, 297 Babahoyo, w. Ecuador, coll. P. L. Sclater; Piaya cayana 

 nigricrissa Hellmayr, Novit. Zool., xiii, Feb., 1906, 44; Stone, Proc. Ac. Nat. Sci. 

 Phila., 1908, 500); but apparently differs in the characters pointed out by Dr. Stone. 



c Pyrrhococcyx columbianus Cabanis, Journ. fur Orn., 1862, 170 (Cartagena, Colombia; 

 coll. Berlin Mus.). — P[yrrhococcyx] columbianus Cabanis, Mus. Hein., iv. Heft 1, 1862, 

 82, footnote (Cartagena; crit.). — Piaya cayana columbiana Hellmayr, Novit. Zool., 

 xiii, 1906, 44 (descr.; range); Stone, Proc. Ac. Nat. Sci. Phila., 1908, 498; Dabbene, 

 Orn. Argent., 1910, 425, 426 (synonymy; range). — Piaya cayana mehleri (not Piaya 

 mehleri Bonaparte) Bangs, Proc. New Engl. Zool. Club, i, 1899, 76 (San Sebastian, 

 Santa Marta, Colombia). — [Piaya] colombianus Sharpe, Hand-list, ii, 1900, 170. 



^ See above, in key and footnote a. 



