206 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 
Upper plumage, brownish olive, or dull, grayish olive; throat and middle of 
belly, white, sometimes tinged with pale yellow; breast (except middle) and 
sides of body, dull grayish olive; under mandible, pale. 
Olive-sided Flycatcher. 
Cantopus borealis. 
See No. 350. 
Crown and back, ashy; throat and breast, ashy white; sides of breast and 
body, orange red}; tail. very long, rarely less than four and one half inches. 
Scissor-tailed Flycatcher. 
Milvulus forjicatus. 
See No. 3438. 
Crown, black, with concealed patch of yellow; back, gray; underparts, white; 
tail, very long, usually more than four and one half inches. 
Fork-tailed Flycatcher. 
Milvulus tyrannus. 
See No. 342. 
Oe 
