BIRDS OP NORTH AND MIDDLE AMERICA. 189 



/. Maxilla dusky or dark horn color. (Eastern Peru and Ecuador to 



British Guiana.) Psittaoula modesta, adult male (extralimital).a 



ff. Maxilla whitish, like mandible. 



g. Width of maxilla at base 8.85 or more, depth of bill at base 14 or more, 

 wing not more than 77 mm. (Eastern Peru.) 



Psittaoula crassirostris, adult male (extralimital). & 

 gg. Width of maxilla at base less than 8.85, depth of bill at base less than 

 14, •wing 87.6 or more. 

 h. Rump and under wing-coverts not lighter than cobalt blue. 

 (Psittaoula vivida.) 

 i. Green color deeper and less yellowish; blue of rump and under 

 wing-coverts darker (smalt blue). (Southern Brazil, south of 

 Cape St. Roque, southward to Paraguay and northern Argen- 

 tina.) Psittaoula vivida vivida (extralimital). c 



ii. Green color lighter and more yellowish; blue of rump and under 

 wing-coverts lighter (cobalt blue). (Middle Brazil, between 

 Cape St. Roque and Rio Amazon, and westward to Bolivia.) 

 Psittaoula vivida flavesoens (extralimital). <* 

 hh. Rump and under wing-coverts not darker than light cerulean blue. 

 i. Under parts of body apple green, in slight (if any) contrast with* 

 color of cheeks; rump and under wing-coverts bright turquoise 

 blue. (Psittaoula cyanopygia.) 

 j. Green color deeper and more yellowish, especially the under 

 parts; blue of rump slightly deeper. (Western Mexico, in 

 States of Sinaloa, Colima, Jalisco, Durango, and Zacatecas 

 and Territory of Tepic.) 



Psittaoula cyanopygia cyanopygia, adult male (p. 191). 

 jj. Green color lighter and less yellowish, especially the under 

 parts; blue of rump slightly lighter. (Northwestern Mexico, 

 in State of Sonora.) 



Psittaoula cyanopygia pallida, adult male (p. 193). 



a Psittacula modesta Cabanis, in Schomburgk's Reis. Brit. Guiana, iii, 1848, 727 (Brit- 

 ish Guiana); Ridgway, Proc. U. S. Nat. Mus., x, 1887, 547 (monogr.). — Psittaoula sclateri 

 Gray, List Birds Brit. Mus., Psittacidse, 1859, 86 (Rio Javarri, e. Peru; coll. Brit. 

 Mus.); Finsch, Die Papag., ii, pt. 2, 1868, 660; Ridgway, Proc. U. S. Nat. Mus., x, 

 1887, 535 (monogr.); Salvadori, Cat. Birds Brit. Mus., xx, 1891, 244, pi. 6.—Psittaculus 

 sclateri Schlegel, Mus. Pays-Bas, Psittaci, 1864, 32. 



& Psittaoula crassirostris Taczanowski, Proc. Zool. Soc. Lond., 1883, 72 (Yurimaguas, 

 e. Peru; coll. — ?); Orn. du Perou, iii, 1886, 100 (tabl.), 215; Ridgway, Proc. IT. s! 

 Nat. Mus., x, 1887, 534 (monogr.); Salvadori, Cat. Birds Brit. Mus., xx, 1891, 247. 



"Psittaoula passerina (not Psittacus passerinus Linnaeus) of Authors generally, 

 part. — Psittaoula passerina vivida Ridgway, Proc. U. S. Nat. Mus., x, sig. 34, Aug. 6, 1888, 

 539 (Bahia, Brazil; coll. U. S. Nat. Mus.); Ibis, 1889, 128; Hartlaub, Journ. fur Orn., 

 1889, 113; Hellmayr, Abh. K. B. Ak. Wiss., ii Kl., xxii Bd., iii Abt., 1905, 587 

 (crit.). — Psittaoula vivida Boucard and Berlepsch, Humming Bird, ii, 1892, 42 (Porto 

 Real, Brazil); Berlepsch, Novit. Zool. xv, 1908, 276, footnote (crit.); Chubb, Ibis, 

 1910, 264 (Sapucay, Paraguay; synonymy).— Psittaoula passerina subsp. vivida 

 Dabbene, Orn. Argent., 1910, 259 (Misiones, Argentina). 



d Psittaoula passerina (not Psittacus passerinus Linnasus) of Authors generally, 

 part; Ridgway, Proc. U. S. Nat. Mus., x, 1887, 538 (monogr.).— Psittaoula flavesoens 

 Salvadori, Cat. Birds Brit. Mus.,xx, 1891, 248 (Bolivia; coll. Brit. Mus.). — Psittaoula 

 cyanopygia (not of Souanc6) Gray, List Birds Brit. Mus., Psittacidse, 1859, 86 (Bolivia). 

 Ps[ittacula] vivida flavesoens Berlepsch, Novit. Zool., xv, Nov., 1908, 285, footnote, 

 in text. 



