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 

 Tyrannus 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. 



