FAMILY TYRANNIDAE 395 



of western Chihuahua and Sonora. It migrates in the winter season 

 to Bolivia and Peru. While in spring and fall it passes through 

 Panama, probably during the same periods as M. I. lutcivcntris, few 

 have been recorded. As stated above, individuals of the two sub- 

 species may be identified only with specimens in hand. 



Zimmer (Amer. Mus. Nov., no. 963, 1937, p. 3) has indicated 

 that Cory's name vicinior applies to this form, and so is to be used 

 instead of sivarthi. The type of vicinior, seen at the Field Museum, 

 is an immature bird, as shown by its lack of the bright-colored crown 

 patch found in the adult. It is marked on the label as male, but with 

 a wing measurement of only 105.8 mm it is probably a female, as 

 may be seen from the dimensions listed above. 



MYIODYNASTES MACULATUS (Muller) : Streaked Flycatcher, 

 Papamoscas Rayado 



Figure 37 



Muscicapa tnaculata P. L. S. Muller, Natursyst., Suppl., 1776, p. 169. (Cayenne.) 



Medium size ; differs from the Sulphur-bellied Flycatcher, Myio- 

 dynastes luteiventris, in white chin, and whiter lower surface (only 

 faintly, if at all, yellow) ; dusky forehead; less prominent light line 

 above eye. 



Description. — Length 190-205 mm. Adult (sexes alike), crown 

 and hindneck olive to light brown, with the feathers edged narrowly 

 with cinnamon ; a central crown patch of bright yellow, or orange- 

 yellow, edged more or less with buff to cinnamon, varied in an occa- 

 sional individual to wholly dark cinnamon-buff ; back, scapulars, and 

 upper rump grayish brown to olive, the feathers edged more or less 

 with buff to buffy brown ; lower rump and upper tail coverts cin- 

 namon-rufous, streaked narrowly with black or dusky ; tail cinnamon- 

 rufous, the feathers lined along the shaft with dull black to dusky; 

 wings dusky, with the lesser coverts edged with pale cinnamon- 

 rufous ; the middle and greater coverts, primaries and inner secon- 

 daries with external margins narrowly cinnamon-rufous ; lores and 

 sides of head dull black ; a narrow, indefinite superciliary line of 

 dull white to dull yellowish white ; rictal stripe and under surface, 

 including chin, white, becoming yellowish on sides, flanks, lower ab- 

 domen, and under tail coverts ; upper foreneck streaked narrowly, 

 sides and breast heavily, with black to dusky ; axillars and under wing 

 coverts white to yellowish white, lined faintly with dusky ; inner webs 

 of wing feathers whitish to pale buff. 



