76 
LATHRIA. 
It is about the size of a thrush, entirely of a dull 
brownish olive, and having every appearance, at first, 
of being a tyrant flycatcher ( Tyrannus). On ex- 
amining it, however, more attentively, we detect 
some of the peculiar characteristics of the Piauhau, 
blended with the more strongly bristled rictus and 
front, the flatter and weaker bill, and the diminished 
stature of the tyrants. The structure of this bird, 
indeed, is peculiarly interesting, because it not only 
shows a decided affinity to Querula, but opens an 
obvious passage to the next sub-family by means of 
a second species, rather smaller, which has recently 
come into our possession, as if to confirm the lo- 
cality in the series we had previously assigned to its 
congener. But the relations of nature are so intri- 
cate and ramified, that the more we investigate them, 
the more do they seem to multiply ; and no sooner 
do we get over one difficulty with “ toil and trouble,” 
but another comes to light ; and this we find in the 
present instance ; there is a curious dull coloured 
bird, about the size of a very small thrush, which we 
described some years ago under the name of Tyran- 
nic calcaratus, on account of its having a series of 
little spines at its knees. Now this bird has so 
