266 BIRDS OF THE REPUBLIC OF PANAMA PART 4 



cealed in the leaves 20 to 25 m from the ground. In various places 

 small trees with thin, light green leaves grew along the shore, often 

 projecting out from rocky ledges or sandy banks over the tide line. 

 These were favorite haunts, as were open-branched trees growing at 

 the tops of higher, steeper bluffs. A male I collected on San Jose on 

 February 19 was in breeding condition. 



As Thayer and Bangs (Bull. Mus. Comp. Zool., vol. 46, 1905, pp. 

 155-156) noted, males from the Pearl Islands sometimes have the yel- 

 low portions of the plumage replaced with orange; there are 2 such 

 males from San Jose in the Smithsonian collection. Some of the adult 

 males from Maje, on the mainland, show traces of yellow in the cheeks, 

 perhaps an indication of intergradation with the race jubaris. 



The songs of aequatorialis in Panama City (heard at a mangrove islet 

 near Old Panama on July 16, 1950) reminded Eisenmann of that of 

 aestiva in New York, and were of two types, both rather sweet: chee, 

 chee, chee, wkhoo-eecha, with variants, and a more ringing swee, swee, 

 swee, chew, chichoo cheeoo. Calls were chip (or chit) and a fast chit- 

 chit chit chit chit. 



DENDROICA PETECHIA AITHOCORYS Olson 



Dendroica petechia aithocorys Olson, 1980, Proc. Biol. Soc. Wash., 93(2), pp. 

 474-475. (5 miles east of La Honda, near Los Santos, Los Santos Province, 

 Panama.) 



Characters. — Compared to aequatorialis, male with brown portions 

 darker, upper breast not streaked with yellow; females of both races 

 variable, but aithocorys generally with more streaking below than 

 aequatorialis. 



A male collected at Puerto Aguadulce, Code, on March 11, 1962, had 

 the iris light dull reddish brown; maxilla and tip of mandible fuscous- 

 black; base of mandible dull neutral gray; tarsus and toes light buffy 

 brown; claws neutral gray. A female taken the same day had the cutting 

 edge of maxilla and mandible dull light neutral gray; rest of maxilla 

 fuscous-black; tarsus and toes and claws dull brown. Another male 

 collected at Aguadulce on January 18, 1963, had the iris dark brown; 

 maxilla fuscous-black; basal half of gonys dull flesh color; rest dull 

 gray; tarsus and toes dull verona brown; claws dark mouse brown; 

 underside of toes dull honey yellow. 



Measurements. — Males (10 from western Panama), wing 59.3-66.0 

 (63.6), tail 45.6-51.1 (48.6), oilmen from base 12.2-13.9 (12.9), tar- 

 sus 17.7-19.3 (18.5) mm. 



