ON THE CLASSIFICATION OP BIRDS. 
66 
liruB is involved in much obscurity. We had long 
entertained the belief, that the baker-birds of South 
America {Furnarius Vieil.) naturally filled this sta- 
tion, particularly as a new species has of late years been 
discovered, having a red breast ; thus resembling the 
robins in colour, although not at all in structure. 
On the other hand, the resemblance , between Petroica 
bicolor* and the genuine locust-eaters (Gryllivora) is 
so remarkably strong, not only in colour, but in form, 
that we think the two groups cannot l)e separated by one 
so dissimilar as that of Furnarius. In the subsequent 
pages, we have characterised what appear to be three 
distinct species of GryUivora, hitherto confounded under 
the common name of G. sautaris : let the ornithologist 
compare these with the Petroica bicolor, and he will, 
no doubt, adopt the opinion we here express as to the 
affinity of the two genera. The 
long-tailed locust-eater (GrylKwra 
longicauda, fig. l.SQ.) seems to be 
the species which connects the 
stonechats with the wagtails, for it 
has the general structure of Gryl- 
Uvora, with the pale and slender 
legs of Enicurus. 
(76.) The union of all the sub- 
families of the Syloiadte, which we 
have now gone through, is affected 
by the Gryllivora, the genus just 
mentioned, among the Saxicolince, 
uniting to Enicurus, which stands at the confines of 
the wagtails {Motacillinai). As all naturalists agree in 
placing Enicurus close to Motaeilla, nothing need be 
said on that affinity ; while the strong resemblance be- 
tween the bills of Enicurus (fig. 1 40. b) and Gryllivora 
— both also having the wings and the feet formed 
nearly on the same model, — leaves no doubt on our 
mind of an absolute affinity between them. 
(77.) Having now traced the great circle of the 
• zooi. in. ii. pi. 43. 
