FAMILY TYRANNIDAE 367 



mountain ridge. At the old Tacarcuna village site on the upper Rio 

 Tacarcuna there were several in March 1964, along the rough, open 

 stream bed. A male was collected here on February 15. 1959, by 

 B. Feinstein. We secured others March 12 and 14, 1964, two of them 

 caught in a mist net set across the river. Charles O. Handley, Jr., 

 found newly hatched young here January 29, 1959, in a nest at the 

 base of a cliff, a meter above the water. On March 18, 1912, E. A. 

 Goldman took a pair on the Rio Seteganti, near Cana. 



Stomachs of those that I have examined have held miscellaneous 

 small insects, among which I have identified small dragonflies, a 

 small vespoid wasp, ants, a parasitic hymenopteron, fragments of 

 elaterids, cerambycids, and others, with gerrids and coreids. They 

 seem to feed rather regularly on dragonflies. 



COLONIA COLONUS LEUCONOTA (Laf resnaye) : Long-tailed 



Tyrant, Maestro 



Figure 34 



Copunis Icuconotus Lafresnaye, Rev. Zool., vol. 5, November 1842, p. 335. 

 (Bogota, Colombia.) 



Small ; mainly black ; with two long, slender central feathers pro- 

 jecting in the tail. 



Description. — Length to end of normal lateral rectrices 115- 

 130 mm. Adult male, two cefitral rectrices much elongated; crown 

 sooty gray centrally, edged narrowly with grayish brown ; a continu- 

 ous band of white on forehead, lores, side of head above eyes, and 

 across hindneck, encircling the upper part of the head ; body mainly 

 dull black, changing to sooty gray on lower surface ; center of 

 back streaked broadly with light gray to grayish white ; rump white ; 

 abdomen faintly whitish in some ; wings and tail brownish black. 



Adult female, elongated central rectrices shorter than in male ; 

 body plumage somewhat duller colored ; crown often grayer ; light 

 streak around head usually grayer on hindneck ; center of abdomen 

 usually whiter. 



Juvenile, dull brownish black ; grayish on lower breast, abdomen, 

 and flanks ; central rectrices broader, the tips projecting only a few 

 millimeters. 



In male and female the iris is dark brown ; bill and feet black. 



Measurements. — Males (10 from Bocas del Toro, Code, Canal 

 Zone, eastern Province of Panama, Darien. and San Bias), wing 

 68.1-73.8 (71.4), normal tail 49.8-56.0 (52.0), long central rectrices 



