Nelson North American Mainland My iar elms. 31 



COMPARATIVE AVERAGE MEASUREMENTS OF MYIARCHUS CRINITUS AND M. 

 CRINITUS RESIDUUS. 



General Notes. As first pointed out by Mr. Bangs, the Great Crested 

 Flycatchers of southern Florida are readily distinguished from birds 

 occupying other parts of its range by the much greater size of 

 their bills. This character appears so constant and is so marked that it 

 seems to be worthy of recognition by name, although not accompanied 

 by any other equally well marked differences. Unfortunately the birds 

 from the Carolinas are most like those from New England, so that Mr. 

 Bangs in his Myiarchus crinitus boreu* (Auk, XV, p. 179, April, 1898) 

 renamed the type form. The name afterwards given by Mr. Howe to 

 the bird of southern Florida must therefore be recognized. The amount 

 of variation in color of this species aside from that due to seasonal 

 wear and fading is not great, though occasional specimens have a lighter 

 or more yellowish green shade on the back. The main variation is in 

 the tail markings. Only sixteen out of sixty-six specimens of true M. 

 crinitus have the inner web of the outer tail feather entirely rufous. The 

 other fifty specimens have a narrow dusky line along the inner side of 

 the shaft, varying from a thin barely appreciable line to a well marked 

 band covering one-fourth the width of the web. This dusky line on in 

 side of shaft of outer tail feather is present in seven out of eight of the 

 birds from southern Florida. There appears to be no geographic sig 

 nificance in this marking, as it occurs throughout the range of the 

 species and also in both sexes. 



Myiarchus mexicanus (Kaup)* 



MEXICAN CRESTED FLYCATCHER. 



1852. Tgrannula mexicana Kaup, Proc. Zool. Soc. London, 1851, p, 



51. Published October 28, 1852. 

 Type locality. "Mexico." Type sent to the Darmstadt Museum from 



*As explained in the notes under Myiarchus cinercuscen^ the name mexi 

 canus is probably a synonym of cinerascens but is used here in conformity 

 with present custom until the type can be examined. 



In case mexicanus proves to be a synonym of cinerascens then Myiarchus 

 cooperi Baird, Birds of N. Am., p. 180, 1858 (Type from "Mexico" Ver- 

 reaux Collection, No. 9100 U. S. National Museum) becomes available 

 for this species. 





