Vol. XXVIII, pp. 169-170 November 29, 1915 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



PRELIMINARY DIAGNOSES OF SEVEN APPARENTLY 

 NEW NEOTROPICAL BIRDS. 



BY W. E. CLYDE TODD. 



The present paper is the third of the series appealing in these 

 Proceedings dealing with the apparently new birds discovered 

 from time to time in the collections received by the Carnegie 

 Museum from tropical America. As before, the descriptions 

 are admittedly brief and preliminary in character, as it is ex- 

 pected that all of the forms here named will be treated more at 

 length at some future time. The author's acknowledgments 

 are due to Mr. Harry C. Oberholser for making critical com- 

 parisons of several of the forms here described. 



Euscarthmus olivascens sp. nov. 



Above, including outer margins of remiges and rectrices, yellowish 

 olive, duller and browner on the pileum ; auricnlars dull brown ; throat 

 dull white, with obscure brownish streaks; breast with a band of pale 

 brown, laterally shaded with olive, and streaked with dull white; 

 abdomen white, obscurely streaked with grayish brown anteriorly and 

 laterally, the flanks and under tail-coverts tinged with pale greenish 

 yellow; under wing-coverts pale yellow. Wing, 56; tail, 45; bill, 12. 



Tyfje, No. 43,820, Collection Carnegie Museum, adult male; Rio Surutu, 

 Bolivia, April 30. 1911; Jose Steinbach. 



Attila arizetus sp. nov. 



Pileum medal bronze, passing into cinnamcm brown on the back, 

 scapulars and tertiaries; rump and upper tail-coverts primuline yellow; 

 tail Prout's brown; remiges dusky, the primaries margined externally 

 with hair brown, the secondaries with cinnamon brown; middle and 

 greater coverts tipped with ochraceous tawny, the lesser series with 

 cinnamon brown ; throat citrine, obscurely streaked with sulphine yellow; 



35— Proc. Biol. Soc. Wash., Vol. XXVIII, 1915. (109) 



