178 Proceedings of the Royal Physical Society. 
The Cuculi, Musophagi, and the Caprimulgi have essentially 
the same style of wing-coverts as the Swifts, only in the 
present group the coverts are unfaulted in the two first, and 
are faulted in the last. This feature is very well seen in 
Caprimulgus europeus. 
The normal Picarian style of wing agrees with the Pas- 
serine in regard to the overlap of the Medians, which form 
an uninterrupted series overlapping proximally. But the 
Minors in this group form rarely less than two rows (Yunz 
has only one), more often there are three, and, in some birds, 
more than three rows of Minors. All these agree with the 
Medians in showing proximal overlap. Some genera of 
Picarian birds are aquincubital, and in such cases there is 
practically nothing to distinguish the wing from that of the 
next section. Yunx torquilla has only one row of Minors, 
with proximal overlap,.and its insertions are separated by a 
bare space from the line of attachment of the Marginals, as 
in the Swifts. The normal Picarian style is very marked, 
and easily enough recognised. 
In the Galline the wing style closely resembles that of 
the Picarians, but it differs from it in the increased number 
of rows of Minors, and also, in general, in the prominence 
assumed by the proximal third of the Medians and Minors, 
which are usually large in size, and show distal overlap. In 
the living birds this feature is so marked as to give to the 
Galline wing coverts the appearance of being imbricated 
distally over the whole surface. The Galline style prevails 
throughout the Alectoropod and Peristeropod sections, and is 
found with no modification I have yet been able to detect 
also in the Crypturi and the Hemipodii. The Turkeys have 
a wing style which is remarkable for the number of covert 
feathers which show proximal overlap. 
Closely following the Galline in wing style, but with the 
difference due to aquincubitalism, comes a large number 
of birds which have, at first sight, very little else than this 
feature in common. There is practically no difference, 
except in the number of Medians and Minors, showing 
proximal overlap between tle Psittaci, Striges, Accipitres 
properly so called,’ Herodiones (Herons and _ Bitterns), 
_ 
