304 Bangs, Birds from Western Costa Rica. [ Ai'k 



Turdid.b. 



Planesticus grayi casius (Bonap.). Six specimens, one adult male and 

 five young, Boruca, April and May. 



Planesticus tristis cnephosa (Bangs). Forty-four specimens, adults 

 and young of both sexes, Boruca, April-July. 



Hylocichla ustulata swainsonii (Cab.). Three specimens, Boruca, and 

 Pozo del Rio Grande, April 21 and 30, and May 3. 



Catharus griseiceps Salvin. Twenty-two specimens, adults and young 

 of both sexes, Boruca, Paso Real, and Barranca, April-July. 



These skins average slightly different from specimens from Chiriqui, 

 being a little paler — whiter — on throat, with the tail and upper tail 

 coverts slightly redder, and the under tail coverts more fulvous. The 

 differences, however, are slight and not altogether constant, and as the 

 Costa Rica specimens were taken in spring and summer and the Chiriqui 

 birds, with which I have compared them, in winter, the slight color differ- 

 ences noted may be seasonal. 



The species is new to the ornis of Costa Rica. 



Catharus melpomene costaricensis Hellmayr. Two young, male and 

 female in nestling plumage, Boruca, July 8 and Barranca, June 28. No 

 adults of this species were taken, but the young are easily recognized, 

 and quite different from the corresponding plumage of Catharus grisei- 

 ceps. These two specimens were identified by Mr. Ridgway. 



Sylviid.e. 



Polioptila superciliaris superciliaris Lau-r. Thirty-one specimens, adults 

 and young of both sexes, Boruca, Paso Real, Pozo del Rio Grande and 

 Barra nca , April-August . 



Troglodytid.e. 



Heleodytes capistratus capistratus (Lesson). One adult male, Barranca, 

 August 13. 



Pheugopedius fasciato-ventris melanogaster (Sharpe). Sixty-eight speci- 

 mens, adults and young of both sexes, Boruca, Pozo del Rio Grande and 

 Barranca, April-August. 



Pheugopedius hyperythrus (Salv. & Godm.). Fifty-six specimens, 

 adults and young of both sexes, Boruca and Paso Real, April-July. 



These are slightly darker and richer tawny below than Panaman ex- 

 amples. 



Troglodytes musculus inquietus (Baird). Two males, one adult May 17, 

 the other young June 19, Boruca. 



The taking of these two specimens positively extends the range of this 

 form to western Costa Rica. I wholly agree with Mr. Ridgway's 

 opinion expressed on page 571, footnote, of 'Birds of North and Middle 

 America,' Part III, that T. intermedins is specifically distinct from T. 

 injuietus. I have never seen any indication of intergradation among the 

 many specimens I have examined. 



