VOl i907 IY ] Bangs, Birds from Western Costa Rica. 299 



Measurements. 



No. Sex. Locality. Wing. Tail. Culmen. 



19064 d 1 ad. Boruca, Costa Rica 51 69.5 11.5 



19062 c? ad. Paso Real, Costa Rica 53.5 69.5 11.5 



19061 9 ad. Paso Real, Costa Rica 48 62.5 11 



Remarks. Hellmayr has lately (Nov. Zool., XIII, p. 28, 1906) pointed 

 out the differences between true S. albescens of southern South America 

 and S. albescens albigularis and assigns to the latter form all specimens 

 from eastern Ecuador, Colombia, Venezuela and the Orinoco region. 

 Specimens from western Costa Rica, the extreme northern limit of the 

 species, differ quite a little from those in my collection from Colombia, 

 and must be considered, I think, to represent still another subspecies. 



Synallaxis pudica Scl. Twenty specimens, adults of both sexes and 

 one young female, Boruca and Pozo del Rio Grande, April-August. 



The young differs from the adults in lacking the rufous crown, the whole 

 upper parts being brownish olive, and the underparts dull olive instead of 

 gray. 



Automolus virgatus (Laivr.). Four adults, both sexes, Pozo del Rio 

 Grande, April and August. This is of course the bird recorded by Cherrie 

 as A. pallidigularis. 



Automolus exsertus Bangs. Fifty-three specimens, both sexes, Boruca 

 Lagato and Pozo del Rio Grande, April-August. 



Xenops genibarbis mexicanus Scl. Forty-nine specimens, both sexes, 

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



Sclerurus guatemalensis (Hartl.). Four adults, both sexes, Boruca, 

 Paso Real and Pozo del Rio Grande, April, May and July. 



Glyphorhynchus cuneatus (Licht.). One adult female, Pozo del Rio 

 Grande, April 11. 



Dendrocichla anabatina anabatina Scl. Fourteen specimens, both sexes, 

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



Dendrornis nana costaricensis Ridgw. Fifty-three specimens, both 

 sexes, young and adult, Boruca, Paso Real, Pozo del Rio Grande, Barranca, 

 Lagato, and Barranca Puntarenas, April- August. 



Dendrornis lachrymosa eximia Hellmayr. One adult male, Pozo del 

 Rio Grande, April 12. 



Picolaptes compressus compressus (Cab.). Fourteen specimens, both 

 sexes, Boruca, Paso Real, Pozo del Rio Grande, Barranca and Barranca 

 Puntarenas, April-July. 



Dendrocolaptes sancti-thomae hesperius subsp. nov. 



Fourteen specimens, both sexes, Boruca, Paso Real, Pozo del Rio Grande 

 and Lagato, April-August. 



Type, from Lagato, Costa Rica, adult cT, No. 19119, coll. of E. A. and O. 

 Bangs. Collected May 27, 1906, by C. F. Underwood. 



