PLONUS. 595 
species of Pionus distinguish them from Chrysotis. In general size, too, they are 
smaller, except in the cases of C. albifrons and C. xantholora, and the colours of the 
plumage less uniformly green. 
Ten species of Pionus are recognized by Count Salvadori, of which two occur within 
our limits, viz. C. senilis, which is not found elsewhere, and C. menstruus, which has a 
wide range in South America and is found throughout the State of Panama, but not 
beyond. 
1. Pionus menstruus. 
Blue-headed Parrot, Edw. Glean. Nat. Hist. vii. p. 226, t. 314°. 
Psittacus menstruus, Linn. Syst. Nat. i. p. 148 ?. 
Pionus menstruus, Wagl. Mon. Psitt. p. 602°; Scl. & Salv. P. Z. S. 1864, p. 368‘; 1879, p. 538°; 
Salv. P. Z. S. 1867, p. 158°; 1870, p. 2147; Ibis, 1871, p. 95°; Scl. in Rowley’s Orn. 
Mise. iii. p. 6°; Salvad. Cat. Birds Brit. Mus. xx. p. 822”. 
Pionius menstruus, Lawr. Ann. Lye. N. Y. vii. p. 299”. 
Viridis, alis extus oleagineo tinctis, capite toto, cervice et corpore subtus usque ad pectus imum ceruleis, regione 
auriculari nigra, pectoris plumis medialiter plus minusve rosaceo tinctis, subcaudalibus et rectricibus 
lateralibus ad basin coccineis, illis viridi limbatis ; remigibus viridibus, rhachidibus et pogonio interno 
juxta iis nigris ; rostro nigro, maxille lateribus ad basin rubris; pedibus fuscis. Long. tota circa 10-0, 
ale 6-9, caude 3:3, rostri culminis 1:2, tarsi 0-6. (Descr. maris ex Santa Fé, Panama. Mus, nostr.) 
© mari similis. 
Juv. capite et pectore viridescentioribus. 
Hab. Panama, Bugaba’, Mina de Chorcha’, Veraguas®, Santa Fé*, Calobre? (Arcé), 
Lion Hill (M‘Leannan* "), Chepo (Arcé’).—Sourn America, from Colombia to 
Guiana, the Amazons Valley, Peru, and Bolivia 2°. 
A long-known Parrot of South America, over which continent it has a very wide 
range. In Central America it is found throughout the State of Panama, and we have 
specimens from many points extending from Chiriqui and the frontier of Costa Rica to 
beyond the Line of the Panama Railway. Mr. Zeledon includes it in his list of Costa 
Rica birds, but does not refer to any specimens in the Museum at San José, and as yet 
we have not seen any from that country, where P. senilis is not uncommon. 
P. menstruus may readily be distinguished from P. senilis by its blue head and the 
colour of the primaries and their coverts, which are green, and not blue as in the 
allied form. 
2. Pionus senilis. 
Psittacus senilis, Spix, Av. Bras, i. p. 42, t. 81. f. 1%. 
Pionus senilis, Wagl., Scl. P. Z. S. 1856, p. 306°; in Rowley’s Orn. Mise. iil. p. 6°; Scl. & Salv. 
Ibis, 1859, p. 188‘; P. Z.S. 1870, p. 837°; Cab. J. f. Orn. 1862, p. 335°; Frantz. J. f. 
Orn. 1869, p. 3667; Salv. Ibis, 1871, p. 95°; Boucard, P. Z. S. 1878, p. 46°; Sumichrast, 
La Nat. v. p. 288"; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 124"; Salvad. Cat. 
Birds Brit. Mus. xx. p. 331°?; Richmond, Pr. U.S. Nat. Mus. xxi. p. 331”. 
Pionius senilis, Lawr. Ann. Lyc. N. Y. viii. p. 184"*; ix. p.131”. 
Psittacus leucorhynchus, Sw. Phil. Mag. new ser. i. p. 438 "°. 
=I 
Or 
* 
