598 SHU FELDT—OSTEOLOGY OF THE WOODPECKERS.  [0Oct.5, 
Colapies, where they essay to enter the right nostril, and the other 
as in Dryobates, where they essay to curve round the right orbit. 
Now, in Xenopicus albolarvatus they reach far forward and 
exhibit an evident tendency to curve round the right orbit and 
succeed in coming down pretty well in front of it. 
Fic. 6. (Upper one.) Superior view of the skull of Colaftes auratus, life size, 
showing the manner in which the thyro-hyals of the hyoid pass to the right 
nostril. 
Fic. 7. (Lower one.) Right lateral view of askull of a Picws, designed to show 
the second method by means of which the extremities of the hyoid are 
stowed away around the right orbit. 64., basihyal; cé7., cerato-branchial ; 
eér., epibranchial. (Taken from Coues’s Aey, and both figures drawn by 
the present writer.) 
Consequently, in Xencpicus we find the usual groove on the top 
of the cranium for the ends of the thyro-hyals and the rounded 
vault of the parietal and frontal regions. These are well dented by 
the quill ends of the capital feathers. This species of Woodpecker 
has a skull most nearly approaching that part of the skeleton in 
some forms of Dryobates, and reminds one but very little of any of 
the skulls in either Spyrapicus or Melanerfes. 
In form the superior osseous mandible in Xezoficus is typically 
picine, being quite unlike what we find in such types as Co/apfes 
and Melanerpes torguatus. At the base of the skull it is interesting 
to note that in this comparatively rare species there appears to 
