59.82:14.78,7 
Article VI.— NOTES ON PTILOSIS, WITH SPECIAL REFERENCE 
TO THE FEATHERING OF THE WING. 
By W. DEW. MILER. 
CONTENTS. 
. | Pack, 
Eutaxy and Diastataxy agit : ; ) : . 82g 
Metacarpal Primaries . ‘ ; ; ; : peo 
First Primary Covert . 3 : ; : ; : as! 38 
Vestigial Eleventh Primary . ‘ 21RD 
Alula_. ; pier a ; Pee 3) 
Outermost Primary Covert . . 186 
Rectrices : : ; : : : We os 
Oil-gland Tuft : ; Repairs ; bee 
Aftershaft : , : ; : : ; pe os’ , ; : oo Re 
During the past few years the writer has had the opportunity of examin- 
ing many specimens of birds in the flesh received by the American Museum 
of Natural History from various sources, chiefly from the New York Zo6- 
logical Park. These represented a majority of the orders and suborders 
and most of them were utilized for skeletons, affording an excellent chance 
to examine certain points in the external anatomy, particularly the feather- 
ing of the wing, that cannot be satisfactorily studied in dried skins without 
injury to them. My observations have been supplemented by examination 
of skins and mounted specimens. The present paper consists mainly of an 
enumeration of such of my determinations as are at variance with the 
published statements. 
Eutaxy and Diastatary— First may be considered the presence or 
apparent absence of the fifth secondary, resulting in the arrangements known 
as eutaxy and diastataxy, or formerly as quintocubitalism and aquintocubi- 
talism. 
Conflicting statements have been made regarding the arrangement in 
the Screamers and the Megapodes. I find by careful examination of three 
fresh specimens of Chawna chavaria and a discarded mounted M egapodius 
cumingi that in these particular species at least a superfluous greater covert 
overlies the space between the fourth and fifth secondaries, or, in other 
words, that they are diastataxic. Chauna, therefore, differs from Anhima 
(Palamedea) which Beddard and Mitchell (P. Z. 5., 1894, p. 536) state 1s 
129 
