490 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



half was occupied by a rounded structure, entered through a circular 

 opening in its side . . . concealed in front and on both sides by an 

 apronlike projection continuous with the outer walls." The two eggs 

 in a set were white to grayish white spotted with chocolate, most 

 heavily as a wreath at the middle or on the larger end. Size ranged 

 from 19.1x12.7, 17.5x13.5, and 18.7x12.3 mm. The young at 

 hatching were dark in color of skin, and without down. 



The body in these birds is strong and heavily muscled. The head 

 is rather large, and the neck slender so that in preparing specimens 

 it is difficult to expose the skull. 



In a review of the forms of Myiobius barbatus found in Peru, 

 Zimmer (Amer. Mus. Nov., no. 1042, 1939, p. 9), with only limited 

 discussion, remarked "that it seems probable, therefore, that sul- 

 phureipygus and aureatus deserve inclusion in the barbatus group" 

 and proceeded to list the specimens that he examined on this basis. 

 This assumption has been accepted currently by other authors, but 

 it is one that to me is not substantiated. The form of this group from 

 Panama is listed as a distinct species, pending additional information. 



MYIOBIUS VILLOSUS VILLOSUS Sclater: Greater Black-tailed 

 Flycatcher, Moscareta Colinegra Grande 



Myiobitis villosus P. L. Sclater, Proc. Zool. Soc. London, vol. 28, May 1860, 

 p. 93. (Nanegal, 1220 meters, west slope of Pichincha, Ecuador.) 



Small ; like Myiobius sulphur eipyg us aureatus but darker in color 

 and larger. 



Description. — Length 130-140 mm. Rictal bristles very long ; when 

 pointed forward in adult males extending 4 mm beyond the tip of the 

 bill. Adult male, similar in general to Myiobius a. atricaudus but 

 larger, with longer rictal bristles and larger bill ; duller green on sides 

 of crown, hindneck, scapulars, wing coverts, and back ; rump slightly 

 paler yellow ; upper tail coverts and tail black ; a large yellow crown 

 patch, shading in some to orange ; wings dusky, secondaries and inner 

 primaries edged narrowly with dull brown ; lores and sides of head 

 dusky, the auricular region with shaft lines of dull white; throat 

 dull bufify white ; lower foreneck, upper breast, sides, and flanks dull 

 cinnamon ; center of lower breast and abdomen pale yellow ; under 

 tail coverts rather dull yellowish white : tibiae olive-brown ; axillars 

 and under wing coverts pale yellowish white ; edge of wing dull 

 yellowish brown ; inner webs of wing feathers edged narrowly with 

 dull cinnamon-brown. 



