INTRODUCTION. 
22 
primaries banded with buff. The sexes are alike in plumage. Most of the members are about the size of 
the European Partridge. "They affect the forests rather than the more open parts of the country: except 
when accompanied by their brood, are usually met with singly or in pairs, and when flushed generally take 
to the branches of trees instead of again descending to the ground. 
The species are :— 
25. Odontophorus Guianensis ...... PI. XXIII. 
26. - -marmoratus. 
Od. corpore subti'is olivaceo-fusco et nigro variegato, his coloribus fascias apud pectus et abdomen efficientibus; 
crisso, et femoribus fuliginoso-nigris. 
Under surface mottled olive, brown and black, assuming the form of bars on the breast and abdomen; under tail- 
coverts and thighs sooty black. 
Ortyx ( Odontophorus ) marmoratus, Gould in Proc. of Zool. Soc., Part XI. p. 107 . 
I have not considered it necessary to figure this species, inasmuch as it only differs from 0. Guianensis in 
having a smaller bill, in having the orbits more extensively denuded of feathers, a more lengthened and 
darker crest, and the whole of the under surface dark brown crossed by narrow bands of buff and black: 
the under tail-coverts and thighs also are sooty black. 
This is one of the species referred to as having been discovered in the neighbourhood of Santa Fe de 
Bogota. The only specimens I have seen, are, one in my own collection, one in that of the Jardin des 
Plantes at Paris, and one in the Museum of the Earl of Derby. 
27. Odontophorus pachyrhynclms 
28. 
-speciosus 
29. - 
- dentatus . 
30. 
-stellatus . 
31. - 
-guttatus . 
32. 
--Balliviani 
PI. XXIV. 
PI. XXV. 
PI. XXVI. 
PI. XXVII. 
PI. XXVIII. 
PI. XXIX. 
This remarkable bird, which may certainly be regarded as the finest species of the restricted genus Oclon- 
tophorus, is rendered conspicuous by its light chestnut crest, and by the stellatious of white ornamenting the 
chestnut-brown colouring of the under surface. 
