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Bangs, Birds from Western Costa Rica. 



TAuk 

 LJuly 



bird collecting that has been done in Panama, Chiriqui and Costa Rica to 

 find a bird of this genus inhabiting Central America, and still more so 

 that it should have been taken by two collectors in two different regions 

 so nearly at the same time. 



At Boruca and Barranca Mr. Underwood did not find the bird living 

 in marshes as Emberizoides sphenura is said to do in South America, but 

 inhabiting small patches of a low green shrub in open places in and near 

 the forest. It kept concealed in these low bushes, was very hard to flush, 

 and had to be shot upon the wing as it darted from one clump to another, 

 and I fancy it is a bird that might easily be overlooked by collectors. 



Arremonops superciliosus superciliosus (Salvin). One adult female, 

 Boca Barranca Puntarenas, Aug. 14. 



Arremonops conirostris richmondi Ridgw. Thirty specimens, adults 

 and young, Boruca, Barranca, Lagato and Pozo del Rio Grande, April- 

 August. 



Arremon aurantiirostris Lafr. Eighty-eight specimens, adults and young, 

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

 August. 



Buarremon costaricensis sp. nov. 



Fifty-two specimens, adults of both sexes and one young female in nest- 

 ling plumage, Boruca, Barranca and Lagato, April-July. 



Type, from Boruca, Costa Rica, adult d\ No. 18606, coll. of E. A. and 

 O. Bangs. Collected July 1, 1906, by C. F. Underwood. 



Characters. Somewhat similar to B. assimilis (Boissoneau), to which 

 species it has usually been referred, of South America — Colombia and 

 Venezuela to Peru — but larger; with larger, both longer and stouter, 

 bill; and shorter and apparently (judged from dried specimens) heavier 

 tarsus; color of back, etc., much clearer olive-green, less reddish olive; 

 flanks and under tail coverts greener, less brownish ; gray parts of head and 

 sides of neck paler, clearer gray; bend of wing brighter, clearer yellow; 

 nearly, usually entirely, lacking the whitish spot on forehead above middle 

 of base of culmen so conspicuous in B. assimilis. 



