LATHRIA. 77 



much the general aspect and colour of C. cinerea^ 

 that it might pass for the young, or a smaller race 

 of the same species, but that the legs are rather 

 longer, and the claws instead of being short and 

 broad are, like all those of the genuine tyrants,- 

 slender, lengthened, and very much curved. The 

 Tgrannus calcaratus differs also very materially from 

 the L. cinerea and the Querula by having the com- 

 missure of the bill, as in Tyrannus, perfectly straight, 

 except of course at the tip, where it suddenly bends 

 down with the hook. Now, in all the typical Am- 

 pelide, and in the two birds just mentioned, the com- 

 missure is invariably arched. It seems, therefore, 

 that this resemblance between T. calcarata and 

 Lathria cinerea must be looked upon as only ana- 

 logical, seeing that the former bird, however dis- 

 guised, has all the essential characters of the true 

 tyrants, the strong and clasping scales of the tarsi 

 alone excepting ; we are more disposed to take this 

 view of its affinities, because the passage from La- 

 thria to P saris seems to be sufficiently made out 

 without the intervention of the bird in question. 



