PIONUS. 595 



species of Pionus distinguish them from Chrysotis. In general size, too, they are 

 smaller, except in the cases of C. alUfrons 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. ^ senilis, which is not found elsewhere, and -^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. 214'; Ibis, 1871, p. 95«; ScJ. in Rowley's Orn. 



Misc. iii. p. 6'; Salvad. Cat. Birds Brit. Mus. xx. p. 322". 

 Pionius menstruus, Lawr. Ann. Lye. N. Y. vii. p. 299 '\ 



Viridis, alis extiis oleagineo tioctis, capite toto, cervice et corpore subfcus usque ad pectus imum caeruleis, regiono 

 auriculari nigra, pectoris plumis medialiter plus minusve rosaceo tinctis, subcaudalibus et rectrieibus 

 lateralibus ad basin coccineis, iUis viridi limbatis ; remigibus viridibus, rbachidibus et pogonio interno 

 juxta iis nigris ; rostro nigro, maxillae lateribus ad basin rubris ; pedibus fuscis. Long, tota circa 10-0, 

 alae 6-9, caudae 3-3, rostri oulminis 1-2, tarsi 0-6. (Descr. maris ex Santa Fe, Panama. Mus. nostr.) 



5 mari similis. 



Juv. capite et pectore viridescentioribus. 



Hab. Panama, Bugaba'^, Mina de Chorcha^, Veraguas^ Santa Fe^ Calobre '^ (Arce), 

 Lion Hill (M'^Leannan * ^^), Chepo (Arce ^). — South America, from Colombia to 

 Guiana, the Amazons Valley, Peru, and Bolivia ^^. 



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 Eailway. Mr. Zeledon includes it in his list of Costa 

 Rica birds, but does not refer to any specimens in the Museum at San Jose, 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. 31. f. 1 ^ 



Pionus senilis, Wagl., Sel. P. Z. S. 1856, p. 306 ' ; in Rowley's Orn. Mi§c. iii. p. 6 ' ; Scl. & Salv. 



Ibis, 1859, p. 138*; P. Z. S. 1870, p. 837 = ; Cab. J. f. Orn. 1862, p. 335'; Frantz. J. f. 



Orn. 1869, p. 366 "" ; Salv. Ibis, 1871, p. 95 ' ; Boucard, P. Z. S. 1878, p. 46 ' ; Sumichrast, 



La Nat. v. p. 238 " ; 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. Lye. N. Y. viii. p. 184"; ix. p. 131 ". 

 Psittacus leucorhynchus, Sw. Phil. Mag. new ser. i. p. 438 ". 



75* 



