542 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



Two very well-marked races are found in Panama, scapularis, which 

 is common in the lowlands and lower foothills of Bocas del Toro and in 

 hill country on both slopes of Veraguas, and simulans, known only from 

 a pair collected at Cana, Darien in 1912. It seems remarkable that with 

 one race so noisy and gregarious, the other should be known from only 

 2 specimens in an isolated locality. To the south of Cana, no race of C. 

 canadensis is found nearer than Vaupes, southeastern Colombia. The 

 race scapularis ranges north to eastern Honduras to southeastern 

 Mexico. There are some recent sight reports of this species from the 

 Cerro Jefe area of the Province of Panama (Ridgely, in litt.), but no 

 subspecies identification was possible. 



CARYOTHRAUSTES CANADENSIS SCAPULARIS (Ridgway) 



Pitylus poliogaster scapularis Ridgway, 1886, Proc. U.S. Nat. Mus., 10, p. 486. 

 (Hacienda "Los Sabalos," Rio San Juan, Nicaragua.) 



Characters. — Crown dark yellow; becoming slightly more greenish 

 on back, wings, and tail; rump and upper tail coverts gray; breast rich 

 yellow; abdomen and undertail coverts gray. 



A male collected at the head of the Rio Guabal, Code, on February 

 27, 1962, had the iris brown; side of maxilla below nostril and mandi- 

 bular rami neutral gray; rest of bill black; tarsus, toes, and claws neu- 

 tral gray. A female taken at Almirante, Bocas del Toro, on February 

 15, 1958, was similar. 



Measurements. — Males (10 from Panama and Costa Rica), wing 

 83.0-89.9 (85.7), tail 63.3-74.1 (67.9), oilmen from base 17.1-18.9 

 (18.4), tarsus 18.2-20.3 (19.6) mm. 



Females (10 from Panama and Costa Rica), wing 80.4-87.0 (84.4), 

 tail 61.3-69.7 (65.2), oilmen from base 17.0-19.1 (18.1), tarsus 18.9- 

 20.4 (19.7) mm. 



Resident. Fairly common in the lowlands and lower foothills of 

 Bocas del Toro and in hill country on both slopes of Veraguas. In 

 Bocas del Toro, it has been collected as high as 690 m on the Boquete 

 Trail (Kennard and Peters, Proc. Boston Soc. Nat. Hist., vol. 38, 

 1928, p. 461). On February 27, 1962, I took a male that was with a 

 small flock of forest birds at the head of the Rio Guabal, Code. Eisen- 

 mann, Pujals, and Skutch (Ridgely, in litt.) found this species "com- 

 mon" north of Santa Fe, Veraguas, on March 28, 1974. In the 19th 

 century, Arce collected a male at Santiago, Veraguas, and McLeannan 

 took 1 in the present Canal Zone, the most eastern record for this form. 

 Salvin and Godman (Biolog. Cent.-Amer., vol. 1, 1884, p. 33) say of 



