V °iS^ VI ] Oberholser, on the Genus Contopus. 7 33 



The type of Contopus albicollis Lawrence, which has been 

 examined in the present connection, although paler than normal 

 virens, particularly about the head and throat, still presents in 

 neither size, color nor proportions any characters which can not 

 be quite closely matched in specimens of this species. 



Horizopus vicinus (Ridgivay). 



Contopus vicinus Ridgway, Proc. U. S. Nat. Mus. X, 1SS7, 576. 

 Geog. Dist. — Swan Island, Caribbean Sea. 



In color closely resembling Horizopus virens, but without much 

 doubt a good species. The shape of its bill inclines toward that 

 of Blacicus caribceus\ but in other characters it is a typical 

 Horizopus. 



Horizopus richardsonii (Sivainson). 



Tyrannula richardsonii Swainson, Fauna Bor.-Amer. II, 1831, 146, pi. 

 46, lower fig. 



Tyrannula phiebe Bonaparte, Comp. List, 1S3S, 24 (nee Muscicapa 

 phcebe Lath.). 



Tyrannula bogotensis Bonaparte, Consp. Av. I, 1850, 190. 



Contopus sordidulus Sclater, Proc. Zool. Soc. 1859, 43. 



Contopus veliei Coues, Proc. Acad. Nat. Sci. Phila. 1866, 61 (in text). 



Geog. Dist. — Western North America, east to the Plains, north to 

 British Columbia and the interior of British America, south through 

 Mexico, Central America and Colombia to Ecuador. 



Material at hand seems to indicate that Contopus sordidulus 

 Sclater is not entitled to even subspecific recognition, the original 

 description having been probably based on exceptionally small, 

 possibly immature, specimens of true richardsonii. 



Horizopus richardsonii peninsulas (Brezvster). 



Contopus richardsonii peninsula Brewster, Auk VIII, 1S91, 144. 

 Geog. Dist. — Southern Lower California. 



The large bill seems to be the principal character of this race, 

 but not an entirely constant one. The shape of the bill in some 

 specimens resembles that of H vicinus. 



