10 
INTRODUCTION. 
Nearly all tlie known species of this genus are about the same size as the members of the genus Ortyw. 
they are all adorned with an elongated crest, which in most of them when erect has a forward curvature, 
and gives the bird a very elegant and sprightly appearance. The tail-feathers and the upper surface 
generally are more minutely freckled or moth-like in their markings than those of the members of any 
of the preceding groups ; they are also distinguished by the more well-defined spotted markings of the 
flanks. The plumage of the sexes differs considerably ; for, although the female is decorated with a similar 
style of colouring, the markings are much less decided and brilliant than in the male. The range of the 
members of this genus extends from IVIexico to Brazil. Some of the species inhabit the temperate regions 
of both the Mexican and Columbian Andes. 
The species are :— 
9. Eupsychortyx cristatus 
10. 
- leucotis . 
11. 
Sonninii . 
12. 
- aflinis. 
Eups. cristse plurnis elongatis, et fuscescenti-cervinis; 
pectore pallide vinaceo-cinereo. 
PI. IX. 
PI. X. 
PI. XI. 
;ulA ferrugineA, apud mentum nigro indistincte notatA; 
Crest feathers lengthened and of a brownish buff; throat rust-red, with some indistinct black marks on the 
chin; chest pale vinaceous grey. 
Ortyss affi,nis, Vigors, in Proc. of Comm. Sci. and Con-, of Zool. Soc. Part I. p. 3. 
From the time Mr. Vigors characterized this bird as distinct, until the present moment, I have always 
had some doubt of its specific value; yet I must admit that upon every occasion that I have compared 
it with its near ally E. Sonninii , I could not but perceive tbat it exhibits sufficient differences to warrant its 
separation; future research alone can decide whether the two birds be identical or not. It is smaller than 
E. Sonninii in all its admeasurements, particularly in the shortness of its tail, is much lighter in colour, 
and possesses some black marks on the throat, of which I have never observed even a trace in any specimen 
of E. Sonninii that I have examined. 
Habitat. Said to be Mexico. 
The original of Mr. Vigors’s description is in the Collection of the Zoological Society; I possess another 
precisely the same in size and plumage, which was obtained in Paris ; both of these, judging from their 
plumage, are adult males. I have not considered it necessary to figure this species. 
