360 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



39. A concealed but well-marked tuft of white feathers at either side of lower 



back ; - medium size, length 155-180 mm 40 



Without concealed white tufts on the sides of the lower back 41 



40. Sides dusky ; throat, center of breast, and abdomen white. 



Olive-sided flycatcher, Nuttallornis borealis, p. 448 

 Throat, breast, and sides wholly dusky, without white. 



Dark pewee, Contopus lugubris, p. 449 



41. Under surface wholly or partly pale cinnamon to rufous-brown 42 



Under surface without rufous-brown ^ 44 



42. Lower breast and abdomen pale cinnamon-brown ; foreneck dark gray, with 



paler shaft lines. 



Ochre-bellied flycatcher, Pipromorpha oleaginea, p. 595 

 Breast and foreneck rufous-brown 43 



43. Rump, wings, tail, and lower surface rufous-brown ; size very small. 



Ruddy-tailed flycatcher, Tcrcnotriccus erythrurus fulvigularis, p. 483 

 Wings and tail dusky, breast and foreneck rufous-brown, abdomen and 

 under tail coverts similar, or yellow. 



Tufted flycatcher, Mitrcphancs phaeocercus, p. 479 



44. Above greenish olive ; foreneck, breast, and sides light olive, with narrow 



yellowish and whitish shaft-line streaks. 



Olive-striped flycatcher, Mionectcs olivacciis, p. 592 

 Colors and pattern not as above 45 



45. A prominent central crown patch of orange, yellow, or white 46 



Without central crown patch, or if present, white and partly or wholly 



concealed 49 



46. Crown patch white Gray elaenia, Myiopagis caniceps absitta, p. 565 



Crown patch yellow or orange 47 



47. No definite wing bars. .Greenish elaenia, Myiopagis viridicata accola, p. 560 

 With two white or whitish wing bars 48 



48. Larger, length 112-125 mm. 



Forest elaenia, Myiopagis gaimardii macilvainii, p. 563 

 Small, length 92-100 m. 



Yellow-crowned tyrannulet, Tyraunulus clatus panamensis, p. 578 



49. Throat, foreneck, and upper breast gray to greenish gray ; abdomen white 



to pale yellowish white ; back somewhat greenish gray ; bill more 



slender 50 



Throat white; lower foreneck, upper breast, and more or less of sides light 

 or dark gray, usually with a somewhat olive cast ; mandible paler, at 

 least at base ; bill averaging broader 53 



50. Throat, foreneck, and upper breast, crown and back clearer, plainer gray ; 



abdomen faintly paler, clearer yellow ; bill slightly broader at the tip, 

 and blacker on mandible. 



Scrub flycatcher, Sublegatus arenarutii arcnarum, p. 570 



Throat, foreneck, and upper surface definitely more greenish gray ; bill 



more slender at tip, with mandible paler, at least at base 51 



- Found also in Mitrcphanes phaeocercus, which differs in smaller size, wing 

 125 mm or less, and has the entire foreneck and breast rufous-brown. 



^ Juvenile Empidonax atriccps may have a reddish brown band across the 

 breast (not found in the adult). 



