FAMILY TROGLODYTIDAE 



83 



in geographic data available, then seems also not to have understood 

 clearly his collector's location. In some instances he seems to have in- 

 terpreted the shipping point, in the present case Santiago, for the col- 

 lector's location, far distant in the mountains. 



This wren has been studied in detail by Skutch on the humid tropical 

 Caribbean slope of Costa Rica (Publ. Nuttall Orn. Club, no. 10, 1972, 

 pp. 159-163) . The song consists of two types, the first being a distinc- 

 tive series of slowly repeated whistled notes, almost like those of a 

 pygmy-owl, heard usually at dawn and the second is a medley of sounds 

 more usual in the family, highly varied and often antiphonal in utter- 

 ance by paired male and female. The ball-shaped nest has two sections, 

 an outer part with a broad opening downward, with a passage to the in- 

 ner chamber that holds the eggs. These, laid in April — in one case three 

 in number, in another, two — are plain white without markings. The 

 young at hatching are without down. 



Carriker (Ann. Carnegie Mus., vol. VI, 1910, p. 759) found a nest 

 at Jimenez, Costa Rica, May 9, 1905, with three immaculate white eggs, 

 so heavily incubated that only one was preserved. This measured 19.5 

 X 14 mm. 



My only personal acquaintance with this species came in November 

 1940 on the Caribbean slope of the Continental Divide on Cerro Santa 

 Maria in northern Costa Rica. Here its clear songs were heard regu- 

 larly, usually about deadfalls in heavy forest. 



THRYOTHORUS LEUCOPOGON GRISESCENS (Griscom): 

 Stripe-throated Wren, Cucarachero Garganta Rayada 



Thryophilus leucopogon grisescens Griscom, Bull. Mus. Comp. Zool., vol. 72, 

 January 1932, p. 359. (Perme, San Bias, Panama.) 



Rather small; dull brown; side of head black, streaked with white; 

 throat dull white, streaked indistinctly with dusky; rest of undersurface 

 plain, without markings, undertail coverts more rufescent. 



Description. — Length 115-125 mm. Upper surface, including scapu- 

 lars, dark grayish brown, very faintly and indistinctly banded with 

 black; wings and tail light chestnut-brown banded narrowly with black; 

 middle and lesser wing coverts slightly paler than back, banded nar- 

 rowly with dull black; lores centrally dull black, above white, this color 

 extending back as a line over eye and auricular area, bordered above by 

 a narrow black line that, as a small black spot, breaks the white at the 

 center of the upper eyelid; side of head black lined with white with a 

 black line along lower jaw; throat dull white, with dusky; undersurface 

 dull tawny brown, slightly paler in the center of the abdomen, more 



