170 Mr. R. Ridgway on the Genus Helminthophaga. 



single one of tlicin. IMie coloration in this instance is as it" 

 the black had been entirely removed from the gular region 

 and auriculars of a typical adult male of H. chrysoptera, 

 leaving tliese parts entirely pure white, even to the roots of 

 tlie feathers. The first plumage of the latter species is un- 

 described and unknown to me; the adult female, however, 

 has, at all seasons, tliese parts of a dull ash-grey on the surface, 

 darker on the concealed portion of tlic feathers. 



The names adopted are based on the following references : — 



1. Helminthophaga pinus, Baird, Birds N. Am. 1858, 

 p. 254. 



Certhia pinus, Linn. S. N. i. 1766, p. 187. 



2. Helminthophaga lawhencii, Herrick, Pr. Acad. Nat. 

 Sci. Philad. Nov. 1874, p. 220, pi. 15. 



3. Helminthophaga chrysoptera, Cabanis, Mus. Hein. 

 1850-51, p. 20. 



Motacilla chrysoptera, Linn. S. N. i. 1766, p. 333. 



4. Helminthophaga leucobronchialis, Brewster, Amo- 

 erican Sportsman, Oct. 17, 1874, p. 33. 



5. Helminthophaga bachmani, Cabanis, Journ. fiir Orn. 

 iii. 1855, p. 475. 



Helinaia bachmani, Aud. Orn. Biogr. ii. 1834, p. 483, 

 pi. 183. 



6. Helminthophaga ruficapilla, Baird, B. N. Am. 1858, 

 p. 256. 



Sylvia ruficapilla, Wilson, Am. Orn. iii. 1811, p. 120, pi. 

 xxvii. fig. 3. 



7. Helminthophaga Virginia, Baird, B. N. Am. 1858, 

 (under expl. plates, 1870) pi. Ixxix. fig. 1. 



8. Helminthophaga luci^e, Cooper, Pr. Cal. Acad. Sc. 

 July 1861, p. 120. 



9. Helminthophaga celata. 



a. celata. 

 Helminthophaga celata, Baird, B. N. Am. 1858, p. 257. 

 Sylvia celata, Say, Long's Exped. i. 1823, p. 129. 



