CHAMiEPETES. — OETALIS. 279 



Palma ^ * {v. Frantzius), Rancho Eedondo {v. Frantzius ^ Zeledon ^ '') ; Panama, 

 Veraguai, Calovevora 2 «, Cordillera de Tole ^ (Arce). 



The Black-breasted Sickle-winged Guan, locally known as the " Gallina volcanica," 

 is very common on the slopes of the Volcan de Irazu. According to Dr. A. von 

 Frantzius, the bird is most frequently shot towards the end of the rainy season, when 

 it leaves the thick forests on the hill-sides and visits the lower-lying and less densely 

 wooded parts. Nothing else concerning its habits appears to have been recorded. 



ORTALIS. 



Ortalis, Merremj Av. Icones et Descr. ii. p. 40 (1786) ; Wharton, Ibis, 1879, p. 450; Grant, Cat. 



Birds Brit. Mus. xxii. p. 504. 

 Ortalida, Wagl. et auctt. 



The sexes in Ortalis are alike in plumage, and the species are further distinguished 

 from those of the foregoing genera by having a narrow band of feathers down the 

 middle of the throat, which is otherwise bare ; no wattle is present. 



Eighteen species are recognized, of which one only extends its range into the 

 southern United States; five are found in Central and the remainder in South 

 America. 



1. Ortalis wagleri. (Tab. LXXII.) 



Ortalida wagleri, G. R. Gray, List GaUinae Brit. Mus. p. 12 ' ; Scl. & Salv. P. Z. S. 1870, p. 534 %• 



Lawr. Mem. Bost. Soc. N. H. ii. p. 306 '. 

 Ortalis wagleri, Grant, Cat. Birds Brit. Mus. xxii. p. 507 * ; Handb. Game-Birds, ii. p. 237, t. 39 '. 



Supra grisescenti-olivacea ; pileo brunnesoenti-nigro, nncham versus graduatim saturate cinereo ; capitis 

 lateribus, supercHio et gula mediana pallide cinereis ; praepectore grisescenti-olivaceo ; peetore et corpora 

 reliquo subtus castaneis ; rectricibus quatuor externis saturate cserulescenti-viridibus, saturate- castaneo 

 late terminatis : rostro fusco, area periophthalmica rubra, cyaneo variegata ; gutture lateraH nudo, rubro ; 

 pedibus griseis. Long, tota circa 25'0, alae 9-6, caudse 10-5, tarsi 3-0. (Descr. maris adulti ex Presidio 

 de Mazatlan. Mus. nostr.) 



P mari similis. Ala 9-5. (Descr. feminae adultae ex Sinaloa. Mus. nostr.) 



Hob. Westeen Mexico \ Mazatlan {Grayson ^% Presidio de Mazatlan {Forrer% 

 San Bias and Santiago de Tepic, Jalisco {Richardson *). 



This species can be easily recognized from all the other members of the genus 

 Ortalis by its chestnut abdomen. It is a native of Western Mexico, occurring from 

 Mazatlan to Jalisco. 



Nothing has been recorded of its habits. 



2. Ortalis poliocephala. 



Penelope poliocephala, Wagl. Isis, 1830, p. 1112'. 



Ortalida poliocephala, Wagl. Isis, 1832, p. 1227 ^ Scl. & Salv. P.Z.S. 1869, p. 364=; 1870, 



p. 537*; Lawr. Mem. Bost. Soc. N. H. ii. p. 306' ; Bull. U. S. Nat. Mus. no. 4, p. 45'; 



Sumichr. La Nat. v. p. 229 '. 



