31. THRYOTHORUS. ' 231 



dusky brown, barred with white or pale rufous ; (juills dull brown, 

 rufeseent along the inner web. Total length .5-3 inches, culuien OS, 

 wing 2'7, tail 2, tai'sus 0'95. 



Adult female (Bugaba, Chiriqui ; E. Arce). Similar to the male, 

 but the abdomen greyer and not of such a deep black. Total length 

 5-7 inches, culmen O'So, wing 2-5, tail 2-2, tarsus 0-95. 



Young. Dift'ers from the adult in having the lower mandible 

 yellow, in the duller rufous colour of the upper surface, the head 

 and neck more dusky brown ; tail rufous, browner towards the tip, 

 and banded regularly with black, about 16 bars being perceptible ; 

 no trace of a white eyebrow ; the lores, ear-coverts, and sides of face 

 ashy; throat and chest white, shaded with ashy; remainder of 

 under surface dull rufous-brown, the centre of the body dull ashy 

 brown, with here and there a few indications of cross bars, more 

 distinct on the under tail-coverts. Total length 2-5 inches, culmen 

 0-7, wing 2-7, tail 2-4, tarsus 0-85. 



The Black-beUied Wren represent the foregoing species from 

 Veragua into Costa Eica. 



a. $ ad. sk. Chiriqui, Veragua {E. Arce). Osbert Salvin, Esq. 



b. cS ad. sk. ; Chiriqui {E. Arce). Osbert Salvin, Esq. 



? juv. 



17. Thryotliorus atrigularis. 



Thrvothorus atrogularis, Sidvin, P. Z. S. 1864, p. 580 ; Laicr. Ann. 



Lye. N. Y. ix. p. 92 ; Scl. <!>• Salv. Nomencl. Av. Neotr. p^7. 

 Pheugopedius atrigidaris, Lawr. Ann. Lye. N. Y. viii. p. 179. 

 Troglodytes atrogularis, Graij, Hand-l. B. i. p. 190, no. 2590. 

 Thryothorus atrigularis, Salv. ^ Godm. Biol. Centr.-Amer., Aves, i. 



p.' 91, tab. vi. fig. 4. 



Adult (Tucurriqni, Costa Eica ; E. Arce : type of species). General 

 colour above dark chestirat, the head darker than the back, of a 

 chestnut-brown colour ; upper tail-coverts slightly paler chestnut 

 than the back; lesser and median wdng-coverts like the back; 

 greater coverts blackish brown, edged with chestnut, the secondaries 

 more broadly ; bastard-wing, primary-coverts, and outer primaries 

 nearly uniform blackish brown, the chestnut margins being appa- 

 rently obsolete ; tail blackish ; an indistinct white loral spot ; a 

 narrow eyebrow, feathers round the eye, sides of face, and ear- 

 coverts black, the latter with a few longitudinal white streaks, the 

 black eyebrow produced over the car-coverts and spotted with 

 white ; throat and breast black ; sides of neck, sides of breast, and 

 remainder of under surface brownish chestnut ; under tail-coverts 

 black, barred with fulvous ; under wing-coverts ashy blackish ; 

 axillaries fulvous brown ; edge of wing white, mottled with black 

 bases to the feathers ; quills dull brow)i below, ashy along the base 

 of the inner web. Total length 5-3 inches, culmen 0-9, wing 27, 

 tail 2-4, tarsus 1. {Mus. Salvin and Godman.) 



Ohs. A second specimen from Tucurriqui {Arce) is in the collection 

 of Messrs. Sdvin and C4odman, but is apparently younger. It differs 

 from the one described above in having seven light fulvous bars on 



