FAMILY FORMICARIIDAE 137 



cutting edge to near tip, and all of mandible except tip, neutral gray; 

 tip of mandible dusky neutral gray ; tarsus, toes, and claws slightly 

 bluish neutral gray. Another, at the same place and date had the gape 

 whitish. 



Measurements. — Males (15 from Panama), wing 67.9-72.4 (70.1), 

 tail 53.2-59.0 (56.0), culmen from base 20.2-23.3 (21.4), tarsus 

 26.2-27.8 (26.9) mm. 



Females (15 from Panama), wing 67.0-69.6 (68.2), tail 53.0-58.9 

 (55.9), culmen from base 20.2-22.5 (21.3), tarsus 26.2-27.8 

 (27.0) mm. 



Weights, (^ 27 grams, $ 22 grams (Fort Sherman, G. V. N. 

 Powell). 



Resident. Common on the Pacific slope from eastern Chiriqui 

 (San Felix, intermediate toward pacificus, Las Lajas) east through 

 Veraguas and Code, including the Azuero Peninsula from the north- 

 western end at the western side of Bahia Monti jo (one record inland 

 at Altos Cacao, elevation 450 meters) to the entire eastern side, and 

 the southern end to the base of the mountains ; the western Province 

 of Panama, Canal Zone, and eastern Province of Panama to Chepo 

 and the lower Rio Bayano (El Llano, Canita) ; on the Caribbean 

 side from northern Code (El Uracillo) to the Canal Zone and the 

 lower Chagres Valley. (I did not find them on Isla Gobernadora and 

 Isla Cebaco, in the lower Golfo de Montijo.) 



This is the better known race of this species through its distribu- 

 tion in the central area of the Republic, where it has been a familiar 

 bird to the many who have had interest in these matters. While the 

 usual common name is pavita, near El Cope, Code, the country boys 

 called them mona del siielo. 



In the field notes of Major-General G. Ralph Meyer there is record 

 of two nests in the Canal Zone, on March 20, 1941, at Quarry 

 Heights. The first was suspended vireolike from a small branch 

 of a low tree, about 2^ meters above the ground. It was so loosely 

 woven of dried grasses that the eggs were visible from beneath. The 

 two eggs measured 23.3x16.1 and 23.1x16.3 mm. The second 

 nest, found near the Gamboa Road junction on May 11, 1941, re- 

 sembled the first. The single egg measured 23.6 X 16.6 mm. The eggs 

 are dull white to creamy white marked with dark brown or gray, in 

 part in small spots, and in part in fine irregular lines. Both male 

 and female incubate. 



The breeding period seems to continue through the early half of the 

 rainy season as Eisenmann (Smithsonian Misc. Coll., vol. 117, no. 5, 



