l86 BROOKLYN INSTITUTE MUSEUM. SCIENCE BULLETIN 2. 6. 



i'. Under parts not white. 



j. Throat white Pilylus grossus. 



f. Throat black. 



k. Under wing-coverts yellow Caryoihrausles canadensis 



canadensis. 



k'. Under wing coverts rose red Periporphyrus eryihromelas. 



g' . Wing not over 65mm., usually less. 



h. Culmen not strongly convex; maxillary tomia nearly 

 straight but with basal portion strongly and abruptly 



deflected Tiaris fuliginosa. 



h'. Culmen distinctly strongly convex; maxillary tomia not 



abruptly deflected at base Sporophila. 



i. More or less black on head. 

 j. Broad white cheek stripe. 



k. Lower throat white, mot*led-with black Sporophila bouvronides. 



'' k'. Lower throat not mottled with black Sporophila lineola. 



j'. No white cheek stripe, entire sides of head, throat 



and upper breast black r Sporophila gutluralis. 



i' . No black on head. 



j. Under parts chestnut Sporophila minuta mimila. 



f. Under parts not chestnut. 



k. Throat slate grey, no white on cheeks or chin . . . Sporophila grisea grisea. 

 k' . Throat ash grey, chin and base of cheeks white . Sporophila plumbea whit' 



leyana. 



PiTVLUS GROSSUS (Liniiaeusj. 



Loxia grossus L., Syst. Nat. ed. 12. 1766. p. 307. 

 Pitylus grossus Berlepsch & Hartert, p. 24. 



The writer did not meet with this species on the Orinoco proper, 

 but specimens were collected for the Tring Museum on the Caura 

 River at Suapure, Nicare and La Pricion; and Klages sent specimens 

 to the American Museum that were collected at La Union during 

 September, October and January. 



CVANOCOMPSA ROTHSCHILDI (Bartlctt). 



Gniraca rothschildi E. Bartl.. Ann. Mag. Nat. Plist. 1890. p. 168; Hell- 



mayr, Novit. Zoul. XIL 1905. p. 2//. 

 Guiraca cayanea rothschildi Berlepsch & Hartert, p. 25. 



This species was seen on the upper Orinoco at Munduapo during 

 February, 1899. It has not been seen by the writer on subsequent 

 expeditions. Specimens were collected at La Pricion on the Caura 

 River by Andre. 



Oryzoborus crassirostris (Gmelin). 



Loxia crassirostris Gm.. Syst. Nat. L 1788. p. 862. 

 Oryzoborus crassirostris Berlepsch & Hartert, p. 25. 

 Native name Pico de plata grandc. 



