496 



BIRDS OF THE GALAPAGOS ARCHIPELAGO— UIDGWAY. vol.xix. 



Measurements of Dendroica aureola. 



Genus CERTHIDEA, Gould. 

 Certhidea, (iovi.u, Proc. Zool. .Soc. T't. \, 1S37, ]>. 7. Tyjie. <'. oJirncen. (ioulil. 



Generic characters. — Bill rather small (exposed ciilmeii L .sstlian two- 

 tliirds tlie taisu.><, not loiijier than middle toe without ehiw, usually 

 shorter), i>ointed, deeper than broad at base: culmeii distinetly ridged, 

 nearly or quite straight for basal halt (more or less), the terminal 

 portion very slightly eurved and the extreme base sometimes slightly 

 convex; gonys straight or very slij;htly convex, shorter than distance 

 from nostril to tip of maxilla; maxillary tomium with an indistinct 

 notch near tip (sometimes obvious only by very close inspection), its 

 basal i)ortion gradually curved downward from a i)oiiit beneath or 

 slightly anterior to nostril; nostrils exposed, rather large, horizontally 

 oval, surrounded superiorly and ]>osteriorly by membrane; riclal 

 bris'les distinct. Wing lather short (less than three times tarsus), 

 rounded (second to lifth quills longest, first not longer than eighth), 

 the primaries exceeding shortest secondaries by less than length t)f 

 culinen. Tail short (more than two-thirds the wing, less than twice 

 tarsus), rounded. Tarsi long and slender, about twice exjxtsed ciilmen, 

 with scutelhe indistinct on outer side; middle toe, with claw, decidedly 

 shorter than tarsus; lateral claws reaching about to base of middle 

 claw; hind toe about as long as lateral toes, but very much stouter, 



