6o8 



BIRDS OF THE REPUBLIC OF PANAMA— PART 4 



1911 (Aldrich, Auk, 1945, pp. 111-112) and Pacora (Ridgely, in litt.). 

 This race is also found in parts of Mexico, Honduras, Nicaragua, and 

 Costa Rica. 



Goldman's specimens were collected in late March and include an 

 immature male molting from juvenal to adult plumage. The juvenal 

 plumage remaining on the undersurface has a yellowish ground color 

 very different from that in juvenile specimens from North America, 

 which are practically white. The presence of this nearly juvenile speci- 

 men indicates that the Grasshopper Sparrow breeds in the dry season, 

 in eastern Province of Panama, whereas I found an active colony of 

 the Code birds in May. As additional evidence that the breeding sea- 

 son, in the Province of Panama at least, takes place in the dry season, 

 Aldrich (op. cit.) notes that the 2 adult specimens, 1 female and 1 un- 

 sexed, are "in fresh plumage, apparently having recently completed 

 the post-nuptial molt." Ridgely (in litt.) and J. Karr, however, noted 

 that Grasshopper Sparrows at Pacora were singing during the peak of 

 the rainy season of 1968. Ridgely and Karr also observed that when 

 areas of ungrazed savanna holding Grasshopper Sparrows were burned 

 during the dry season the birds did not return the following year. 



AMMODRAMUS SAVANNARUM BEATRICEAE Olson 



Ammodramus savannarum beatriceae Olson, 1980, Proc. Biol. Soc. Wash., 93(3), 

 pp. 757-759. (El Coco, Code Province, Panama.) 



Characters — Palest of all the subspecies of A. savannarum. Equal 

 in size to A. s. bimaculatus, but throat, breast, flanks, and undertail 

 coverts pale pinkish buff, not rich ochraceous-yellow. Dorsum much 

 grayer than in bimaculatus and median crown stripe very pale, almost 

 white, instead of deep buff. 



A female, the type, collected at El Coco, Code, on March 10, 1962, 

 had the iris light brown; cutting edge of maxilla and mandible except 

 extreme tip dull brownish white; rest of maxilla and tip of mandible 

 fuscous; tarsus, toes, and hind claw light brownish white; three an- 

 terior claws dark brown. 



Measurements. — Males (4 from Code), wing 52.8-57.6 (55.9), tail 

 40.5-42.8 (41.6), culmen from base 11.5-12.2 (11.8), tarsus 17.9-19.8 

 (18.5) mm. 



Females (5 from Code), wing 54.6-56.0 (55.0), tail 38.3-42.2 

 (39.7), culmen from base 11.1-12.2 (11.6), tarsus 17.6-19.1 (18.3) 

 mm. 



Resident. Known only from the savannas of southern Code Prov- 



