VOL. XIX, PP. 93-94 JUNE 4, 1906 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW QUERQUEDULA. 

 BY HARRY C. OBERHOLSER. 



A single specimen of a teal from Lake Titicaca, Peru, some 

 time since acquired by the United States National Museum, ap 

 pears to belong to an undescribed species which may be called 



Querquedula orinomus sp. nov. 



Chars, sp. Similar to Querqnedala cymtoptem, but very much larger ; 

 rump and upper tail-coverts considerably barred with buff or ochraceous ; 

 chin without a trace of blackish. (In Querquedula cyanoptera the chin is 

 rarely, if ever, entirely without a suffusion of blackish, and usually has 

 much of this ; the rump and upper tail-coverts have little if any indica 

 tion of light bars, sometimes none.) 



Dfscript ion .Type, adult male, No. 150,110, U. S. N. M.; Puna, Lake 

 Titicaca, Peru ; altitude 12,550 feet; A. J. Norris. Head, neck all around, 

 upper back, scapulars, and all the lower parts excepting the under tail- 

 coverts rich red brown, between chestnut and burnt sienna, duller on the 

 abdomen ; center of crown and forehead black, the upper back, scapulars, 

 and flanks spotted and irregularly barred with black; back, rump, and 

 upper tail-coverts olive brown, rather lighter on the upper tail-coverts, and 

 everywhere with broad edgings and irregularly crescentic, often imperfect, 

 bars of paler on at least the terminal portion of the feathers, these bars broad 

 and chestnut or rufous on middle back, almost obsolete or reduced to me 

 dian spots on upper rump and lower back, narrow and buff or ochraceous 

 on lower rump and superior tail-coverts; central tail-feathers olive brown, 

 the others fuscous, and all narrowly margined externally with buffy, 

 the outermost with ochraceous ; lower tail-coverts brownish black with a 

 purplish tinge and somewhat mixed with chestnut; primary quills and 

 primary coverts fuscous with a greenish sheen on exposed portions; sec 

 ondaries fuscous narrowly tipped with whitish, their exposed portions (the 

 distal part of outer webs) bright metallic grass green; greater-coverts with 

 a wide terminal band of white; lesser and median coverts light grayish 

 blue ; lining of wing grayish brown externally, pure white internally. 



This giant edition of Qacrqnednla cyanopttra apparently represents that 



species in the region about Lake Titicaca, if not also throughout the Andean 



plateau, to which, however, it is probably confined. It needs comparison 



21-PROC. BIOI, Soc. WASH., VOL. XIX, 19b6. (93) 



( 



