Carriker : List of the Birds of Costa Rica. 633 



tail very stiff; throat and chest vermiculated 

 with buff-ochraceous; back brown. 



Glyphorhynchus cunealus. 

 gg. Bill ordinary; throat white; back, wings, and tail 

 chestnut; breast spotted with buffy-white. 



Margatornis rubiginosa. 

 ff. Larger (wing ioo mm.); pileum and lower parts olive- 

 greenish; lower parts spotted with buff-ochraceous. 



Xiphorhynchus punctignla. 

 ee. Pileum more or less streaked. 



/. Back almost, if not quite, as heavily streaked as pileum. 

 g. Larger (bill 36 to 39; wing no to 118 mm.). 



h. Whole back and lower parts buffy, each feather 

 bioadly edged with black, giving a spotted 

 appearance. 



Xiphorhynchus lacrymosus eximius. 

 hh. Back and lower parts merely with broad shaft- 

 stripes of buff-ochraceous, rather broadly 

 bordered with black on back and more 

 narrowly on chest. 



Xiphorhynchus flavigaster (extralimital). 

 gg. Smaller (bill 26; wing 92 mm.); pileum, throat, 

 and lower parts heavily streaked with buffy- 

 white, strongly edged with black on lower part; 

 back sparingly, but strongly, streaked. 



Picolaptes compressus compressus. 

 ff. Back unmarked, or with only a few inconspicuous shaft- 

 streaks. 

 g Entire under parts (except throat immaculate buff- 

 ochraceous) broadly streaked with buffy, edged 

 with black; pileum and nape with spatulate 

 buffy spots. 



Picolaptes affinis neglectus. 

 gg. Only chest streaked with buff-ochraceous. and 

 scarcely, 01 not at all edged with black. 

 h. Larger (wing 107; bill 35 mm.); pileum and 

 nape with spatulate spots of buff-ochra- 

 ceous; buffy streaks on chest broad and oval, 

 slightly edged with black. 



Xiphorhynchus nanus costaricensis. 



hh. Smaller (wing, 100; bill, 23 mm.); pileum with 



only fine shaft-lines of buffy; spots on chest 



more wedge-shaped, and not edged with 



black. Deconychura typica. 



bb. Tail soft, shafts ordinary, although rectrices often very acuminate. 



c. Pileum and back with shaft-streaks of buff-ochraceous; throat im- 



