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, hut 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 
Tyr annus 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- 
pelidie , 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 Psaris seems to be sufficiently made out 
without the intervention of the bird in question. 
