On a new Species of Grebe from Central Peru. 109 



IX. — Description of a new Species of Grebe from Central Peru. 

 By Hans, Graf von Beklepsch, and Jean Stolzmann. 



(Plate IV.) 



-t'PoDiCEPs''^ TAczANOwsKii, sp. 11. (Plate IV.) 



-t Podiceps caliparaus, Tacz. Orn. du Perou^ iii. p. 493, 

 partim. 



D. corpore supra schistaceo-nigricante, occipite colloque 



postico medio fere nigris, pileo anteriore cum regione 



oculari obscure cinereis, plum is auricularibus elougatis et 



lanceolatis, nitide cinereo-brunneis ; corpoi'c subtiis albo 



sericeo, lateribus scbistaceo variegatis ; alis dorso con- 



coloribus, exceptis secundariis albis in vexillo externo 



plus minusve scbistaceo variegatis ; rostro violaceo-nigro, 



apice albescente ; pedibus brunneis, in speciminibus 



nonnullis fulvo-brunneo variegatis. 



Obs. Species D. calliparceo (Less.), ut videtur, maxima 



affinisj sed rostro fere duplo longiore, narium aperturis multo 



longioribus, maxilla basi magis carinata, pedibus digitisque 



multo longioribus et crassioribus, plumis auricularibus longi- 



oribus cinereo-brunneis nee stramineo-aureis, pileo anteriore 



obscurius cinereo nee pallide griseo-brunneo, gula genisque 



inferioribus pure albis nee griseo-bruuneis, rostro violaceo- 



nigro, apice albescente (nee unicolore nigro), jjrimo visu dis- 



tinguenda. 



* With reference to the use of this generic name for the Grebes, 

 Mr. Ridgway (Proc. U.S. Nat. Mus. 1882, p. 42) has written as follows :— 

 " Liunseus united the Grebes and the Loons or Divers in the same genus 

 Colymbus, but in 1760 Brisson had already separated the Loons from the 

 Grebes, retaining the name Colymbus fiir the latter. In 1777 Scopoli 

 followed his example. Ten years later Latham applied the name Podiceps 

 to the same groups, this consequently being a mere synonym of Colpnbits 

 as restricted by Brisson." Mr. Eidgway and the authors of the ' American 

 Check-list' therefore use Cohpnbus for the Grebes, and Urinator of 

 Cuvier for the Divers. Against this view I may state that both Brisson 

 and Scopoli really intended but did not succeed in separating the Grebes 

 from the Loons, as the generic appellations proposed by them for the 

 Loons (viz. Mergus and Uria) were both preoccupied. Therefore things 

 remained as they were when Linne made his genus Colymbus (to embrace 

 Loons and Grebes) until Latham created Podiceps for the Grebes, this 

 having been the first legal subdivision of the genus Colymbus, L. 



