408 MESSRS. SCLATER AND SALVIN ON [Apr. 4, 



' Iconographie' (tab. vi.), the whole abdomen is white, sparingly 

 striped with narrow blackish markings, and the bill is narrower and 

 much less elevated than in this species. Merganetta armata, of 

 which an excellent figure will be found in Gray and Mitchell's 

 ' Genera of Birds,' resembles the present bird in having a black 

 breast ; but the edges of the scapularies are white instead of rufous, 

 and the throat and fore neck are black, instead of being pure white 

 as in its two northern allies. It would seem, therefore, that this 

 species occupies an intermediate position as regards the differential 

 characters of the male, just as it does in geographical range, between 

 the two known species. As regards the female, our specimen does 

 not appear to differ in colour from the corresponding sex of Merga- 

 netta armata (Des Murs, Icon. t. xlviii.). 



3. Merganetta leucogenys. 



Anas leucogenys, Tsch. Wiegm. Arch. 1843, p. 390. 

 Erismatura leucogenys, Tsch. Faun. Peru. p. 311, t. xxxvi. 

 Merganetta leucogenys, Scl. & Salv. Ex. Orn. p. 200 ; P. Z. S. 

 1809, p. 601, et 1871, p. 679, et Nomencl. p. 131 ; Tacz. P. Z. S. 

 18/4, p. 554. 



Merganetta Columbiana, Des Murs, Rev. Zool. 1845, p. 179, et 

 Icon. Orn. t. 6; Scl. P. Z. S. 1855, p. 164 (Bogota). 



Supra cinerea, clorsi plumis nigris rufescente utrinque marginatis ; 

 uropygio fasciolis minutis albis nigrisque variegato ; capite 

 colloque toto albis, linea circum rostrum, pileo medio in strigam 

 nuchalem producto et linea ab oculis ad collum imum utrinque 

 descendente nigerrimis ; alis ccerulescenti-schistaceis, tectrici- 

 bus et secundariis albo anguste marginatis ; speculo atari ceneo- 

 viridi ; abdomine albo obsolete nigro striolato ; rostri flavi cul- 

 mine nigricante, pedibus rubellis : long, tota 12*5, alee 6'0, 

 caudce 4'5, rostri a rictu 1*4, tarsi 1*5. Fern, supra cinerea, 

 dorso nigro flammulato ; genis, cervicis lateribus et corpore toto 

 inferior efulvo-rufis unicoloribus : long, iota 15'5,«te 5"3, caudce 

 4, tarsi 1*5, rostri a rictu 1*4. 

 Hab. Columbian Andes near Bogota (Goudot) ; Quindiu range 

 (Salmon); Ecuador (Mm*. S.-G.) ; Central Peru (Tsckudi et Jelsfti). 

 This Merganetta was originally discovered by Goudot, a well- 

 known French collector, in the neighbourhood of Bogota. There is 

 a skin in Salvin and Godman's collection from Ecuador ; and Tschudi 

 and Jelski obtained it in Central Peru. 



Subfamily VII. Merging. 



Genus Mergus. '-Type. 



Mergus, Linn. S. N. i. p. 207 (1766) M. cucullatus. 



Lophodytes, Reich. Av. Syst. Nat. p. ix.(1852) M. cucullatus. 



Besides the Hooded Merganser, which occasionally intrudes from 

 the north, one peculiar endemic species of this group is found in the 

 Neotropical region. 



