1915.] Miller, Three New Genera of Birds. 517 
A further difference is seen in the long outer tail-feathers. In Macrop- 
salis and Hydropsalis the shafts of these feathers are stout and strong, 
tapering very gradually to the tip. In Uropsalis the shaft, while not con- 
spicuously more slender at the base, is rapidly reduced, and throughout the 
greater part of its length is very slender, only about half as thick as in 
Macropsalis; in the last four inches, however, it widens out and becomes 
twice as wide as at the corresponding point in Macropsalis. This is shown 
excellently in U. lyra, much less so in the single male specimen of U. seg- 
mentata examined, the outer rectrices of which, however, are not fully devel- 
oped, at least as to length. 
In Macropsalis and Hydropsalis the rectrices are conspicuously marked 
with white on the inner web. ‘This is not the case in either of the species of 
Uropsalis. 
Chryserpes gen. nov. 
Type Picus striatus Miill. 
Similar in general structure to Centurus ! but with straighter bill which, seen from 
above, is relatively narrower basally, the terminal half thicker and with more nearly 
parallel sides as far as the wedge-shaped tip, the culmen sharply ridged, culminal 
“shelves”? broader and flatter, supranasal ridge better developed, running out dis- 
tinctly beyond middle of culmen, terminal portion of maxillary tomium distinctly 
(though not sharply) beveled, the tip deeper (more chisel-like); feathers of crown 
and nape shorter, those of nape smaller, stiffer and more compact (not lengthened 
into a short crest as in Centurus), the barbs shorter, coarser and closer; upper tail- 
coverts much less than one-third the length of the tail instead of much more than 
one-third; middle rectrices narrower and less abruptly acuminate terminally. Tuft 
of oil-gland more nearly vestigial. Coloration wholly different from the very uniform 
style of Centurus. 
The fourth toe is equal to the third instead of shorter as in most of 
the species of Centurus. C. uropygialis and C. hypopolius however agree 
with Chryserpes in this respect. In the short, rounded wing and relatively 
long outer primary Chryserpes is equalled only by C. radzolatus. 
The striking color differences between the two genera are set forth in 
the accompanying table. 
The peculiar Haitian Woodpecker for which this genus is proposed passed 
as Picus striatus until 1846 when Gray referred it to Centurus, where it was 
allowed to remain until Hargitt in 1890 (British Museum Catalogue) trans- 
ferred it to Chloronerpes. Judging by the key given in the ‘Catalogue,’ 
Hargitt relied on the supposed shorter wing-tip to distinguish this species 
from Centurus, but in this respect it agrees closely with C. radiolatus of 
Jamaica. 
ce eee ee een e a eee ee a ea a er EE ET Ts ee 
1 All the species of Centurus with the exception of C. nyeanus and C. hypopolius have 
been examined. 
