454 BULLETITSr 50, UNITED STATES NATIONAL MUSEUM. 



dusky horn color (in dried skins); length (skins), 115.6-120.6 (118.1): 

 wing, 61.5-63 (62.2); tail, 46.2-47.5 (46.7); exposed culmen, 11.2-11.7 

 (11.4); tarsus, 17.8-18.3 (18).^ 



AdMlt female. — Similar to the adult male, but duller in color; yellow 

 of forehead and crown more or less obscured by olive-green tips to 

 feathers; gray of upper parts more or less tinged with olive-green, 

 and white of under parts more or less tinged with yellow, especially 

 on breast; black line on lores and behind eye duller, more dusky 

 grayish; length (skin), 121.9; wing, 61.5; tail, 47.5; exposed culmen, 

 10.9; tarsus, 17.3.' 



[In its typical form, as described above, this bird is essentially a 

 H. chrysoptera, without the black (male) or gray (female) throat-patch 

 of that species and with the black or gray band on side of head reduced 

 to a narrow streak, as in H. pinus. It is also essentially a H. pinus 

 with the wing of II. chrysoptera, the olive-green of upper parts replaced 

 by gray and the yellow of sides of head and under parts replaced by 

 white. Variations tend more toward H. pinus than toward S. chrysop- 

 tera; for, while the under parts are often considerably tinged with 

 yellow (sometimes extensively yellow, the whole breast being frequently 

 bright yellow) and the upper parts tinged with olive-green, there 

 is seldom, if ever, an indication of the black or gray throat-patch of 

 H. chrysoptera. The black postocular streak, however, is sometimes 

 greatly extended, both as to length and width, specimens thus marked 

 approaching II. chrysoptera in this respect. It is altogether probable, 

 both in the case of this form and H. lawrencii, that dichromatism as 

 well as hybridism enters into the question of their origin; in other 

 words, while II. pinus apparently exhibits, rarely, a white and gray 

 (instead of yellow and olive-green) phase, and H. chrysoptera., as rarely, 

 a yellow and olive-green, instead of white and gray, phase, the two 

 species interbreed to such an extent, not onl\' with one another, but 

 each with II. leacobronchialis and II. kmiren.cii (the hybrids being 

 fertile inter se) that the problem is a very complicated one, and there- 

 fore most difficult to work out satisfactorily.' 



Eastern United States: Massachusetts (Newton ville; Hudson); Con- 

 necticut (Wauregan; Suffield; Deep River; Portland; Saybrook; Sey- 

 mour; New Haven; North Haven); New York (Rockland County; 

 Sing Sing; Croton Point; Parkville, Long Island); Pennsylvania 

 (Delaware County; Chester County); New Jersey (Maplewood; 

 Englewood; Morristown) ; Maryland (Riverdale); Virginia (Alex- 

 andria County); Louisiana (Mandeville) ; Michigan (Ottawa County). 



' Two specimens. 

 ''■ One specimen. 



^See Brewster, Bull. Nutt. Orn. Club, vi, 1881, 218; Auk, iii, 1886, 411; and Ridg- 

 way, Auk, ii, 1885, 359. 



