PSAR1S. 
81 
the tyrant shrikes ( Tyranninae ). We suspect 
these birds to feed both upon insects and fruits, for 
several have rictal bristles, and their gape is very 
wide. There is a peculiarity in their colouring 
which deserves attention ; four or five, — which from 
other circumstances we know to be distinct species, 
— are nevertheless coloured precisely alike; they 
are of that delicate light grey, so universally seen 
among the gulls, hut with black heads and wings. 
Now, we explain this remarkable analogy by point- 
ing to the part of the circle of Mmcicapidai where 
this group enters, and we shall then find that this 
station is precisely analogous to that which the 
Laridce or true gulls appear to hold in the circle of 
the Natatores ; the Natatores being itself represented 
among the Dentirostres by the family of Musci- 
capidce. The large head, again, of all the Psariance 
reminds us at once of the Pachycephala among the 
chatterers, and on comparing the two family circles, 
those particular groups stand opposite to each other. 
It is right however to mention, that no such analogy 
can be traced between Querula and the swallow 
chatterers ( Bombycillidoe ), but then it may be as 
fairly supposed this want of conformity originates 
in ignorance of undiscovered birds, as in erroneous 
views. Time, however, will clear up such nice 
points which now lay open to controversy, and in 
the mean time we must endeavour to dispose the 
contents of imperfect groups, like the present, as 
near as we can to the course which nature has pur- 
sued in her more perfect groups. 
