^62 RiDGWAY o» the Genus Psittacida. [October 



A specimen mentioned by Dr. Hartlaub under P. cyanochlora 

 as a supposed young male of P. passerina^ from Caracas, is an 

 adult male of P.guianensis Swains. This species agrees with 

 P. cyanochlora in nearly everything except the coloration of the 

 under wing-coverts, which is like that of P. spcngeli in the re- 

 stricted area of dark blue feathers, P. cyanocJilora (like P. 

 deliciosa^ if distinct), having not only the entire under wing- 

 coverts (except narrow outer margin) but also the whole of the 

 axillars uniformly of this rich dark blue color. In other words, 

 the ^diwXi \r\?i\.& o^ P. guianen sis combines the bicolored wing- 

 lining of P. spcngeli with the emerald-green rump of P. cyati- 

 ochlora. 



Granting that the nearness of the two localities represented re- 

 spectively by/*, spengeli and P. exquisita (Baranquilla and Car- 

 tagena) preclude the probability of their being separable as races 

 even, butgiving due weight to the comparatively wide separation 

 of P. cyattochlora and P. deliciosa (the broad Amazon river, and 

 more than four hundred miles of territory intervening) together 

 with apparent differences of size and coloration noted above, we 

 would have for the region between the Lower Amazon and the 

 Magdalena delta four definable forms, forming a graded series 

 as follows : 



Rump turquoise-blue; under wing-coverts bicolored (greenish turquoise- 

 blue with dark, blue spot) i. V. spengeli 



(Magdalena delta). 

 Rump emerald-green. 



Under wing-coverts bicolored (as in P. spengeli) ; sides of head 



yellowish green 2. . P. guianensis 



(Venezuela and Guiana). 

 Under wing-coverts unicolored (wholly rich dark blue). 



Sides of head yellowish green as in P. guianensis. 3. P. cyanochlora 



(Rio Branco). 



Sides of head vivid Paris-green 4. P. deliciosa 



(Lower Amazon). 



