17. BASILEUTERUS. 399 



coverts blackish, externally olive like the back ; bastard--wing dusky 

 brown, externallj' ashy grey ; primary-coverts dusky l)rown, nar- 

 rowly edged with olive ; (juills dusky, edged externally with yellowish 

 olive, brighter on the primaries, which are ashy towards their ends ; 

 tail-feathers ashy brown, externally washed with yellowish olive ; 

 crown of head rich chestnut as far as the nape, the latter being 

 like the back and bordered on each side by a tolerably broad line of 

 black, which extends from the base of the forehead to the hind 

 neck ; this is again succeeded by a broad superciliary streak of 

 white, running from the base of the bill to the sides of the neck ; 

 lores, feathers round the eye, sides of face, cheeks, and ear-coverts 

 black ; the feathers below the eye and the cheeks slightly varied 

 with white bases ; throat and abdomen white, the latter washed -n-ith 

 pale yellow ; fore neck and sides of breast light ashy grey, as also the 

 sides of the neck ; flauks somewhat more olive ; thighs slaty grey ; 

 under tail-coverts white with a slight tinge of yellow ; axillaries and 

 under wing-coverts dull white, with dusky bases ; quills dusky below, 

 ashy along the edge of the inner web. Total length 4-6 inches, 

 culmen O'o, wing 2-45, tail 2-3, tarsus 0*9. 

 Hah. Costa Rica to Panama. 



a, b. Ad. sk. Chiriqui, Veragua (Arce). Sclater Collection. 



c. cj" ad. sk. Chiriqiu (Arce). Salviu-Godmau CoU. 



d. Ad. sk. Chu-iqui (Arce). Salviu-Godmau Coll. 



e. Ad. sk. L-azu district, Costa Rica Salvin-Godmau Coll. 



(H. Rogers). 



25. Basileuterus griseiceps. 



Basileiiterus griseiceps, Scl. Sf Salv. P. Z. S. 18G8, p. 170 ; iid. Nomencl. 



Ao. Neotr. p. 10 (1873). 

 Setophaga griseiceps, Gray, Iland-l. B. i. p. 245, no. 3559 (1869). 



Adult male (type of species). General colour above clear yellowish 

 olive, the lesser wing-coverts like the back ; greater and median 

 coverts dusky brown, externally yellowish olive, brighter towards 

 the ends of the feathers ; bastard-wing and primary-coverts dusky 

 brown, narrowly edged with yellowish olive ; quills dusky brown, 

 externally yellowish olive, brighter on the primaries, which are 

 somewhat ashy towards the ends ; tail-feathers light ashy brown, 

 extern allj-j-eUo wish olive; head and hind neck clear slaty grey, the 

 fore part of the crown black, with slaty-grey edges to the feathers ; 

 a white stripe running from the base of the bill to above the eye ; 

 lores and feathers around the eye duU slaty black ; sides of face, 

 cheeks, and ear-coverts dark slaty grey, with a few whitish shaft- 

 lines ; base of chin ashy white ; malar line and entire under surface 

 of body bright yellow ; under tall-coverts dull yellow, with dusky 

 centres to the feathers ; sides of body and flanks slightly greener 

 olive ; axillaries and under wing-coverts dusky olive, edged with 

 yellow, especially near the edge of the wing ; tail-feathers dusky 

 brown below, ashy along the edge of the inner web : " iris reddish 



