species of the Family Icteridsn. 157 



Praecedenti similis, sed crassitie minore : long, tota 14'5, 

 alse 6'9, caudse rect. med. 7'2, ext. 4'6. 



Hab. Veragua^ Panama, Colombia, and Western Peru, 



Mus. P. L. S. et S.-G. 



The name assimilis was based upon Bogota skins, wLich 

 are always much contracted. Veraguan examples are rather 

 larger. 



If the Peruvian bird is exactly similar_, it is probable that 

 Swainson^s name should be employed for this form. But 

 Swainson's types are not at Cambridge, and I have not been 

 able to find them, if they are still in existence. 



5. QuiSCALUS GRAYSONI, Sp. UOV. 



Quiscalus 2)alustris, Cassin, Pr. Ac. Sc. Phil. 1861, p. 411. 

 Quiscalus major, var. palustris, Baird, Brew., et Ridgw. N, 

 A. B. ii. p. 214; Lawr. Mem. Boston Soc. N. H. ii. p. 282 

 (N.W. Mexico). 



Similis Q. macruro, sed crassitie minore quara Q. assi- 

 milis: long, tota 14'5, alse Q'Q, caudae rectr. med. 6*5, 

 ext. 4'5. 

 Hab. Mazatlan, Mex. [Grayson) ; Presidio, W. Mex. 

 {Forrer) . 

 Mus. S.-G. 



This is a small Western Mexican form of Q. macrurus, of 

 which the adult is, I believe, quite indistinguishable from 

 Q. macrurus in plumage, the specimens wdtli brown thighs 

 mentioned by Cassin and Lawrence being doubtless imma- 

 ture. It is very doubtful whether this form has any real 

 claim to Swainson's title palustris; his specimens from the 

 lakes near Mexico city were probably of the species which 

 he afterwards described as Q. tenuirostris. 



6. Quiscalus tenuirostris. (Plate V.) 



Scaphidurus palustris, Sw. Phil. Mag. n. s. i. p. 437 (1827) ? 



Quiscahs tenuirostris, Sw. An. in Men. p. 299 (1838) ; 



Cassin, Pr. Ac. Sc. Phil. 1866, p. 411; Baird, Brew., et 



Hidgw. N. A. B. ii. p. 214; Scl. et Salv. Nomencl. p. 38. 



Atro-purpureus unicolor; alis et cauda extus nitenti-nigris ; 



tibiis brunnescentibus ; rostro tenui : long, tota 13"0, 



alse 6*7, caudse rectr. med. 7"0, ext. 4*3. Jr. Ferrugineo 



SER. V. VOL. II. N 



