Vol. 30, pp. 127-130 July 27, 1917 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW GENERA, SPECIES, AND SUBSPECIES OF SOUTH 



AMEPJCAN BIRDS. 



BY W. E. CLYDE TODD. 



The present paper, the sixth of the series to appear in these 

 Proceedings, contains descriptions of a number of new neotropi- 

 cal forms discriminated by the writer in the past few months, 

 together with diagnoses of two new generic groups which appear 

 worthy of separation. Care has been taken in preparing these 

 descriptions to make them sufficiently full and precise for all 

 practical purposes, so that there may be no ambiguity in their 

 application, without sacrificing conciseness. Critical remarks 

 on the new forms will be deferred until a later date, when they 

 will duly appear in a series of papers to be published by the 

 Carnegie Museum of Pittsburgh. The names of colors are from 

 Mr. Ridgway's "Color Standards and Color Nomenclature." 



Idiospiza, genus novum. 



Similar to Catamenia Bonaparte, but tail without any white spots, the 

 rectrices narrow and acuminate; and wing more pointed, the ninth 

 (outermost) primary shorter than the third. Type, Linaria inornata 

 Lafresnaye. 



Myospiza humeralis meridanus, subsp. nov. 



Similar to Myospiza humeralis humeralis of Guiana, Brazil, Bolivia, etc. , 

 but general coloration darker, the pileum more heavily streaked with 

 black, especially in front; gray edgings of the feathers of the back less 

 prominent, with the brown more conspicuous; and breast and sides more 

 heavily shaded with buffy grayish. Prevailing tone of upper parts brown, 

 not black, as in M. h. columbianus Chapman. 



Type, No. 36,753, Collection Carnegie Museum, adult female; Guarico, 

 Lara, Venezuela, February 2, 1911; M. A. Carriker, Jr. 



31— Proc. Biol. Soc. Wash., Vol. 30, 1917. (127) 



