Observations on the Cubital Coverts of the Euornithes. 177 
present, and the coverts consequently unfaulted. In the 
Caprimulgi (or, at any rate, in Caprimulgus itself) the coverts 
are faulted and the 5th cr. is absent. The wing style of the 
Goatsuckers is, in fact, the same as what that of the Cuckoos © 
would be if aquincubital. The Swifts agree with the fore- 
going six groups in having a predominant distal overlap of 
the coverts; but, as before remarked, some forms are quin- 
cubital, while others lack the 5th cr., and the wing style 
differs accordingly. 
The normal Passeres have a style peculiar to themselves. 
In these the one row of Medians shows uninterrupted 
proximal overlap, and this is succeeded by a single row of 
Minors, which shows overlap in the reverse direction, so as 
to be hardly distinguishable from the Marginals. This style 
is characteristic of the whole of the Passeres excepting the 
Corvide. In the Crows, as I have pointed out on former 
occasions, the first six Medians overlap distally, the next 
three (or a variable, but small, number) overlap proximally, 
and the remainder show distal overlap. The difference 
between the wing style of the Corvide and that of the whole 
of the rest of the Passeres is much too pronounced to be 
entirely without significance. If one may judge by the wing 
style, the Corvidee do not belong to the Passeres at all, but 
must form a group close outside, and not far removed from 
the Paradisiidze, and with a relationship more distant with 
the Trogones.. 
To what I have already stated regarding the Trochili I 
have nothing further to add—their wing style is peculiar, 
and finds its nearest parallel in the next group. 
The Cypseli present two styles, in accordance with the 
presence or the absence of the 5th cr. They have one row 
of Medians showing distal overlap, and usually two rows of 
Minors arranged in the same manner as the Medians. The 
bases of the Marginals are marked off from those of the 
Minors by a tract devoid of feathers, so that the distinction 
that has been made between these two groups of feathers is 
fully justified in this case. Where the 5th cr. is absent 
the coverts are faulted, giving rise to a very peculiar style 
of wing. 
VOL, XIL. ; M 
