Vol. XXV, pp. 87-92 May 4, 1912 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTIONS OF SOME NEW SPECIES AND SUB- 

 SPECIES OF BIRDS FROM TROPICAL AMERICA. 



BY ROBERT RIDGWAY, 



Curator, Division of Birds. U. S. National Museum. 



[Published by permission of the Secretary of the Smithsonian Institution.] 



The following new species and subspecies have been noted 

 during the preparation of Part VI of "Birds of North and 

 Middle America." As the completion of this volume is still 

 some months distant, it is thought desirable to publish the new 

 forms without delay. 



Capito aurantiiventris sp. nov. 



Type from an unknown locality in the Upper Amazon Valley.* Xo. 

 7601, coll. Mus. Comp. Zool. Collected by Newton Dexter. 



Agreeing with C. peruvianus ( ?) from eastern Ecuador, etc., in orange- 

 red throat (unspotted in both sexes), but differing in having the forehead 

 wax yellow instead of reddish orange, rump streaked with golden yellow 

 or orange instead of sulphur yellow, and the abdomen and Hanks crossed 

 by a broad hand of orange-yellow or yellowish orange instead of being 

 pale sulphur yellow, passing into white posteriorly. 



Measurements of type. — Wing, 83; tail, 50.5; culmen (from base), 22.5; 

 tarsus, 22; outer anterior toe, 19.5. 



Capito auratus bolivianus suhsp. nov. 



Type from Rio Beni, Bolivia. Xo. 47,.'!7!>, Mus. Comp. Zoology; adult 

 male. ( Native skin. ) 



Differing from C. a. auratus of eastern Peru and Ecuador to Colombia, 



•According to information received from Mr. Bangs, the specimens collected by 

 Newton Dexter, while accompanj ing tin- Thayer Expedition, were mostly made on the 

 Rio Negro and Rio Tapaj6s, ami Mr. Hangs thinks the bird designated above came 

 from somewhere along the latter. Unfortunately, through someone's carelessness, the 

 original labels of the specimens of birds in the collection were all removed, so there is 

 now no record of the localities or other data. 



l.")— Proc. Biol. Soc. Wash., Vol. XXV. L912. (*7) 



