882 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



which generic rank is given in the present work, the generic characters 

 arc apparent (only to a less degree) in the females as well as in the 

 males; but such is not the case (so far as I am able to discover, at 

 least) in the present genus, the females of which are not only closely 

 similar in coloration but in external structural details also. 



KEY TO THE SPECIES OF PROCNIAS.o 



a. General color white, or chestnut-rufous with white head and neck; an elongated 

 fleshy frontal appendage or else whole throat naked. (Adult males.) 

 h. Head and neck white; wings white or chestnut-rufous; no vermiform appendages 

 on throat. 

 c. Throat feathered; an elongated fleshy frontal appendage. 



d. ^\^lole plumage white; frontal appendage sparsely feathered; no rictal 

 appendages. (Guiana, Surinam, and Cayenne.) 



Procnias nivea (extralimital)6 



(Id. Only the head and neck white, the rest of plumage uniform chestnut-rufous ; 



frontal appendage entirely naked; a long, vermiform rictal appendage. 



(Nicaragua to Panama.) Procnias tricarunculata (p. 883) 



cc. Throat (together with loral, orbital, and malar regions) naked; no frontal (nor 

 rictal) api^endages; whole plumage white. (Southeastern Brazil.) 



Procnias nudicoUis (extralimital)c 

 bh. Head (except throat) brown; wings black; throat with numerous vermiform 

 appendages. (Guiana, Venezuela, and Trinidad) 



Procnias variegata (extralimital)'^ 

 aa. General color plain olive-green above, the under parts striped with olive-green and 

 yellowish. (Adult females and young males, c) 



«A11 the known species are given in the key in order to show the remarkably distinct 

 characters of the adult males. 



bAvipelis nivea Boddaert, Tabl. PI. Enl., 1783, 49 (based on Cotinga blanc de Cayenne 

 Daubenton, PI. Enl., 793, 794).— P[rocmas] mum Gray, Gen. Birds, i,^1846, 280.— C[7ias- 

 morynchus] niveus Cabanis and Heine, Mus. Hein. , ii, 1859, 108; Sclater, Cat. Birds Brit. 

 Mus., xiv, 1888, 403. — [Ainjjelis] carunculata Gmelin, Syst. Nat., i, pt. ii, 1788, 841 

 (based on Cotinga alba Brisson, Orn., ii, 356; Cotinga blanc ou Guirapanga Buffon, Hist. 

 Nat. Ois., iv, 454, etc.). — Procnias carunculata "Hofm[ansegJ "' Kuhl, Buffon et Dauben- 

 toni Fig. Av. Col. Nom. Syst., 1820, 14. — Casmarhynchus carunculatus Temminck, 

 Tabl. Meth., 1839, 21. — [Chasmorhynchns] carunculata Bonaparte, Consp. Av., i, 1850, 

 178. — Chasmorhynchus albus (not Cotinga aZ6a Thunberg) Sclater, Ibis, 1866, 407. 



cAmpelis nudicoUis Vieillot, Nouv. Diet. d'Hist. Nat., viii, 1817, 164 (Brazil). — 

 Casviarhynchos nudicoUis Temminck, PL Col., livr., 62, 1825, text to pis. 368, 382. — 

 Procnias nudicoUis Maximilian, Reise. Bras., i, 1823, 52; ii, 158. — Chasmorhynchus 

 nudicoUis Sclater, Gat. Birds Brit. Mus., xiv, 1888, 404. — Cotinga alba Thunberg, 

 Mem. Soc. Moscow, vi, 1823, 177.— P[rocmas] alba Gray, Gen. Birds, i, 1846, 280.— 

 [C/iosmor/jync/iM,'?] a^6o Bonaparte, Consp. Av., i, 1850, 178. — Casmarhynchus ecaruncu- 

 Za^us Spix, A V. Bras., ii, 1825, 3, pi. 4 (Rio de Janeiro, Brazil). — Procnias ventralis 

 (not of Temminck) Hahn, Vogel aus Asien, etc.. Lief, vii, 1820, [63], pi. 2. 



(^[Ampclisi variegata Gmelin, Syst. Nat., i, pt. ii, 1788, 841 (based on Cotinga nsevia 

 Brisson, Orn., ii, 354; Guira-punga Ray, Aves, 166; Averano Buffon, Hist. Nat. Ois., iv, 

 457; Variegated Chatterer Latham, Synop. Birds, ii, pt. i, 99). — Casmarhynchos variegatus 

 Temminck, PI. Col., livr. 9, 1821, text to pi. 51. — Chasmorhynchus variegatus Sclater, 

 Cat. Birds Brit. Mus., xiv, 1888, 405. — Procnias variegata Leotaud, Ois. Trinidad, 

 1866, 259. — Ampelis carnobarba Cuvier, Rfegne Anim., iv, 1817, 172, pi. 4, fig. 4. 



« Owing to an insufficient representation of adult feinales and young males of the 

 several species (there being no female of C. niveus in the National Museum collection) 

 I am not able to give a satisfactory key. The species are very much alike, but prob- 

 ably a good series of specimens would enable one to distinguish them with certainty. 



