164 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



abdomen, and under tail coverts immaculate ; elsewhere streaked 

 with black ; axillars, under wing coverts, and inner margins of under 

 side of wing feathers white ; in some a few faint slate spots on inner 

 side of carpal edge of wing. 



Adult female, crown, hindneck, and upper back tawny to cinna- 

 mon-brown, streaked with black (amount of streaking and depth of 

 brown variable) ; rest of back and scapulars streaked with white ; 

 wings as in male ; middle of back in some washed with cinnamon- 

 buff ; rump lighter gray than in male ; long, lax upper tail coverts 

 tipped faintly with buff; tail black, edged and tipped with white; 

 foreneck, abdomen, and under tail coverts white ; side of head, side 

 of neck, upper breast, and sides cinnamon-buff, varying individually 

 in depth of color ; under wing coverts and inner wing lining white. 



Immature, male and female, under surface lightly streaked with 

 black or slate ; crown and hindneck as in adult female. 



A male, taken on the Rio Pequeni near the Candelaria Station, 

 March 4, 1961, had the iris mouse brown; maxilla black; mandible 

 neutral gray ; tarsus, toes, and claws bluish slate. 



In a female, collected with the male described above, the cutting 

 edge of both upper and lower halves of the bill and the tip of the 

 mandible were dull white ; otherwise like the male. 



Measurements. — Males (10 from Panama), wing 49.8-52,5 (50.8), 

 tail 24.1-28.8 (26.2), culmen from base 14.8-16.9 (16.2), tarsus 

 17.1-18.2 (17.7) mm. 



Females (10 from Panama), wing 47.0-51.0 (48.9), tail 23.3-27.3 

 (25.2), culmen from base 15.1-17.0 (16.1), tarsus 17.4-18.2 

 (17.8) mm. 



Resident. Found locally in the Tropical Zone ; on the Pacific slope 

 through the eastern sector of the Province of Panama and Darien, to 

 550 meters near Cana on Cerro Pirre ; on the Caribbean slope from 

 western Bocas del Toro (Almirante) east through Colon and the 

 lower Chagres Valley, including this part of the Canal Zone, and 

 San Bias (east to Puerto Obaldia). 



This is a species of thickets, undergrowth at forest edge, often 

 along streams, and lower second growth (rastrojo). In swampy 

 woodland it may live in tangles of vines in the upper level of the tree 

 crown. They associate normally in pairs, male and female together, 

 that move about under cover usually concealed as is the custom of 

 related species of the genus of similar size found in Panama. 



Males sing regularly in early morning, and often during the day, 

 a brief trill formed by the repetition of a single note, chee chee 

 chee chee-ee-ee. The birds themselves search steadily for insect food 



