188 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



yellow (or both) — never with red or orange; sexes different, females 

 being without any blue. 



Range.— Western Mexico; Colombia to Peru, Bolivia, Brazil, and 

 Guiana; apparently wanting in whole of area from southern Mexico 

 to Panama. (About twelve species.) 



KEY TO THE SPECIES AND SUBSPECIES OF PSITTACULA. 



a. Wings with more or less of blue. {Adult males.) 

 b. Rump blue, 

 c. Forehead, cheeks, and throat clear yellow. (Eastern Peru.) 



Fsittacula xanthops (extralimital)." 

 cc. Forehead, cheeks, and throat, green. 

 d. Orbital or postocular region blue. 

 e. Forehead and cheeks light yellowish green (apple green); postocular 

 region light azure blue; under parts light pea green; back, scapulars, 

 and proximal secondaries light grayish olive-green. (Psittaeula ccelestis.) 

 f. Back, etc., grayer; under parts more grayish green; blue of rump darker 

 (deep hyacinth blue). (Western Peru and Ecuador.) 



Fsittacula coelestis coelestis, adult male (extralimital.)* 

 ff. Back, etc., more brownish, more strongly contrasted with color of 

 hindneck; under parts more yellowish green, becoming olive-buff on 

 flanks; blue of rump lightsr (smalt blue). (Colombia.) 



Psittaeula coelestis lucida, adult male (extralimital).e 



ee. Forehead and checks deep emerald green; orbital region cobalt blue; 



under parts light bluish green (nearly malachite green) ; back, scapulars, 



and proximal secondaries light parrot green. (Colombia and eastern 



Ecuador.) Psittaeula conspicillata, adult male (extralimital). d 



dd. Sides of head wholly green. 

 e. Smaller under wing-coverts wholly uniform blue (except carpo-metacarpal 

 edge); proximal primaries blue. 



a Psittacula xanthops Salvin, Novit. Zool., ii, no. 1, Feb. 1, 1895, ,19, pi. 2, fig. 2 

 (Viiia, Huamachuco, e. Peru; coll. Tring Mus.?); Baron, Novit. Zool., iv, 1897, 6 

 (Vina, Maranon); Salvadori, Ibis, 1906, 462 (reprint orig. descr.; crit.). 



bAgapornis ccelestis Lesson, Compl. CEuvr. de Buffon (LeVSque), xx, April, 1847, 

 198 (near Guayaquil, w. Ecuador; quotes Echo du Monde Savant, 1844, pi. 2). — 

 Psittaeula ccelestis Lafresnaye, Rev. Zool., 1848, 172; Finsch, Die Papag., ii, pt. 2, 

 1868, 666; Ridgway, Proc. U. S. Nat. Mus., x, 1887, 537 (monogr.); Salvadori, Cat. 

 Birds Brit. Mus., xx, 1891, 241. — Psittaeulus ccelestis Schlegel, Mus. Pays-Bas, Psittaci, 

 1864, 32. 



c P[sittacula] ccelestis lucida Ridgway, Proc. U. S. Nat. Mus., x, sig. 34, Aug. 6, 

 1888, 532, 538 (Colombia; coll. Bost. Soc. Nat. Hist.); Salvadori, Cat. Birds Brit. 

 Mus., xx, 1891, 242, footnote. 



<* Psittaeula conspicillata Lafresnaye, Rev. et Mag. de Zool., xi, 1848, 172 (Colombia 

 or Mexico; coll. Lafresnaye, now in coll. Bost. Soc. Nat. Hist.); Finsch, Die Papag., 

 ii, pt. 2, 1868, 663, part; Ridgway, Proc. U. S. Nat. Mus., x, 1887, 536 (monogr.); 

 Salvadori, Cat. Birds Brit. Mus., xx, 1891, 243.— Psittaeulus conspicillatus Schlegel, 

 Mus. Pays-Bas, Psittaci, 1864, 32.— [Psittaeula] cyanopis Lichtenstein, Norn. Mus. 

 Berol., 1854, 71 (Colombia; nomen nudum!).— "Psittaeula orbitula, Reichb., in 

 Schaufuss Catal. 1862" (Finsch, Die Papag., ii, 1868, 663). 



