Vol i907 1 V l Bangs, Birds from Western Costa Rica. 295 



Caprimulgid^e. 



Nyctidromus albicollis (Gmel.). Three specimens, an adult male and 

 two young in nestling plumage, Boruca, May and July. 



MlCHOPODID^E. 



Streptoprocne ' zonaris zonaris (Shaw). Six adults, both sexes, Boruca, 

 April and May. 



Tkochilid>e. 



Threnetes ruckeri {Bourc). Fifteen specimens, adults of both sexes, 

 and one not full grown young, Pozo del Rio Grande, April and August. 



Glaucis hirsuta aeneus (Lawr.). Three adults, two males and a female, 

 Pozo del Rio Grande, August. 



The form of Glaucis hirsuta that ranges from Costa Rica to Nicaragua, 

 and that was named (/laucis ozneus by Lawrence (Proc. Ac. Phil. 1867, 

 p. 232), is a strongly marked subspecies, differing from true G. hirsuta 

 of Panama and southward, in its smaller size, nearly wholly black bill, more 

 bronzy back and much clearer and brighter cinnamomeous color of the 

 underparts — all southern specimens being conspicuously dull and grayish 

 cinnamon beneath. 



Phaethornis longirostris longirostris (Less. & Delatt.). Sixteen speci- 

 mens, adults of botli sexes, Pozo del Rio Grande and Boruca, April, June 

 and August. 



Phaethornis guy coruscus Bangs. Two specimens, male and female, 

 Pozo del Rio Grande, August. 



Phaethornis adolphi Gould. Fourteen adults, both sexes, Boruca, 

 April-July. 



Florisuga mellivora (Linn.). One adult male, Boruca, June 21. 



Aphantochroa cuvieri (Delal. & Bourc). Five adults, both sexes, 

 Boruca, May and June. 



Agyrtria decora (Salv.). Eighty-nine specimens, both sexes, Boruca, 

 Paso Real, and Pozo del Rio Grande, April-August. 



Saucerottea sophiae (Bourc. & Muls ). Four adults, both sexes, Barranca 

 Puntarenas, August. 



Saucerottea niveoventer (Gould). One hundred and three specimens, 

 both sexes, Boruca, May-July. 



Amizilis tzacatl dubusi (Bourc. & Muls.). Fifty-one specimens, both 

 sexes, Boruca, Barranca, and Boca Barranca Puntarenas, April-August. 



Amizilis cinnamomea cinnamomea (Less.). One adult female, Barranca 

 Puntarenas, August. 



Hylocharis eliciae (Bourc. & Muls.). One hundred and forty-one speci- 

 mens, both sexes, Boruca, and Pozo del Rio Grande, May-August. 



Chlorostilbon assimilis Lawr. Fourteen specimens, adults of both 

 sexes, Boruca, May and June. 



1 See Oberholser, Proc. Biol. Soc. of Washington, Vol. XIX, pp. 67-70. May, 

 1906, for change of generic name of these swifts. 



