FAMILY TROGLODYTIDAE 



85 



cepted by other recent students. With the considerable series now avail- 

 able it is clearly evident that thoracicus is uniformly and heavily 

 streaked with black and white over throat and breast. In T. leucopogon 

 the marking is confined wholly to the upper throat, with foreneck and 

 breast immaculate. The two styles of marking are clear cut in their 

 differences, with no intergradation. 



THRYOTHORUS NIGRICAPILLUS Sclater: Bay Wren, 

 Cucarachero Cabecinegro 



Figure 10 



Thryothorus nigricapilhis P.L. Sclater, Proc. Zool. Soc. London, pt. 28, May 

 1860, p. 84. (Nanegal, 4000 feet elevation, Ecuador.) 



Medium size; crown and hindneck black, rest of upper surface 

 chestnut-brown, with wings and tail barred black; throat white, rest of 

 undersurface chestnut or barred. 



Figure 10. — Bay Wren, Cucarachero Cabecinegro, Thryothorus nigricapillus. 



