NATURAL SCIENCES OF PHILADELPHIA. 135 



This is a remarkable and apparently new species of Monasa, strictly of the 

 same group, and related to M. Morphotus (==albifrons and personata) and M. pe- 

 ruana. Like those species, the present bird has a conspicuous white frontal 

 band, which reaches very nearly from one eye to the other, but it differs from 

 those species in being without any white whatever on the throat. It is, how- 

 ever, easily distinguished from all known species, by the cinereous color of the 

 body above and below and wing coverts ; which color is very light, and in some 

 specimens nearly white on the whole of the upper wing coverts, and but slightly 

 darker on the under wing coverts. Several specimens labelled as both sexes 

 are in the collection from the river Truando. 



Stated by Messrs. W. S. and C. J. Wood, to have been seen once only in the 

 Cordilleras on the river Truando, in January, 1858. A party of eight or ten 

 specimens was observed sitting very quietly in a tree at some distance from the 

 ground, and being quite regardless of the gun or the presence of man, several 

 were obtained. Specimens labelled as females are slightly larger than those 

 stated to be males.* 



19. Trogon Massena, Gould. 



Trogon Massena, Gould, Monog. Trogonidse, (1838). 

 Gould. Mon. Trog. pi. 16. 

 From the Truando, and also from the delta of the Atrato. 

 All the specimens in the collection are of young birds in but indifferent con- 

 dition, amongst which one specimen may be the young of T. macrourus. 



* The following species of Monasa are in the Museum of this Academy : 



1. Monasa atRa, (Boddaert). 



Cuculus ater, Bodd Tab. PI. Enl. p. 30, (1783). 

 Cuculus tranquillus, Gm. Syst. Nat. i. p. 417, (1788). 

 Bucco cinereus, Gm. Syst. Nat. i. p. 409, (1788). 

 Corvus australis, Gm. Syst. Nat. i. p. 377, (1788). 

 Bucco calcaratus, Lath. Ind. Orn. i. p. 206, (1790). 

 Corvus affinis, Shaw, Gen. Zool. vii. p. 381, (1809). 

 Buff. PI. Enl. 512, Le Vaill. Barbels, pi. 44, 45. 



2. Monasa morphoeus, ( Wagler). 



Buceo morphoeus, Wagler, Hahn's Voegel, Asien. Africa, &c. pt. xiv. (1822). 

 "Bucco leucops, 111." Licht. Verz. p. 8, (1823). 

 Bucco albifrons, Spix, Av. Bras. i. p 53, (1824). 

 Monasa personata, Vieill. Gal. i. p. 23, (1825). 

 Hahn, Voegel, pt. xiv. pi. 2. Spix. Av. Bras. i. pi. 41, fig. 1, Viedl. Gal. i. pi. 36 

 Swains. B. of Braz. pi. 12. 



3. Monasa nigrifrons, (Spix). 



Bucco nigrifrons, Spix, Av. Bras. i. p. 53, (1824). 

 Lypornix unicolor, Wagler. Syst. Av. (1827, not paged). 

 Spix. Av. Bras. i. pi. 41, fig. 2. 



4. Monasa axillaris, (Lafresnaye). 



Monasa axillaris, Lafres. Rev. et Mag. Zool. April, 1850, p. 216. 

 Monasa flavirostris, Strickland, Jard. Contr. April, 1850. 

 Jard. Contr. 1850, pi. (not numbered). 

 It would require nice discrimination to determine with certainty the priority of either 

 of the above names. My impression is that M. Lafresnaye's name is entitled rather to 

 preference, because it bears an unmistakeabledate, which the other does not, but requires 

 to be determined by examination or approximation. 



5. Monasa peruana, Verreaux. 



" Monasa peruana, Bp. et Verr." label on spec, from M. Verreaux. 



Monasa peruana, Sclater, Proc. Zool. Soc. London, 1855, p. 194. 

 This is very closely allied lo the now well known M. morphoeus, and scarcely dis- 

 tinguishable without specimens of both. A specimen bearing M. Verreaux's label is in 

 the Acad. Coll., and is therefore entirely reliable as this species. 



6. Monasa tallescens, Cassin. 



I860.] 



