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66 ON THE CLASSIFICATION OF BIRDS. ie | 
line is involved in much obscurity. We had lor 
entertained the belief, that the baker-birds of Sout 
America (Furnarius Vieil.) naturally filled this sta- 
tion, particularly as a new species has of late years beer 
discovered, having a red breast ; thus resembling ne 
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 be separated by one 
so dissimilar as that of Furnarius. In the cube at 
pages, we have characterised what appear to be three 
distinct species of Gryllivora, hitherto confounded under 
the common name of G. saularis: 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 (Gryllivora 
longicauda, fig. 139.) seems to be 
the species which connects the 
stonechats with the wagtails, for it 
has the general structure of Gryl- 
livora, with the pale and slender 
legs of Enicurus. ' 
(7 6.) The union of all the sub- | 
families of the Sylviade, which we 
«@ have now gone through, is affected 
=. by the Gryllivore, the genus just § 
R mentioned, among the Sawicoline, } 
uniting to Duienariiss which stands at the confines of 
the wagtails (Motacilling). As all naturalists agree in 
placing Enicurus close to Motacilla, nothing need be 
said on that affinity ; while the strong resemblance be- 
tween the bills of Enicurus ( fig. 140. b) and Gryllivora 
(a),—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. t 
(77.) Having now traced the great circle of the 
* Zool. Ill, ii. pl. 43. ‘ 
4 
