28 Mr. Strickland's Commentary 



It is very doubtful whether Lanius nengeta, Lin., can be quoted as 

 synonymous with Xolmis polyglotta (Spix), mihi. On comparing a 

 specimen of the latter with Brisson's description of his Cotinga ci- 

 nerea (the foundation of Linnseus's Lanius nengeta), taken from Marc- 

 grave, I find neither the black eye-streak nor the white tail-covers 

 which are mentioned by Brisson. That author, moreover, omits to 

 mention the black streak on each side of the chin, and the white ba- 

 sal spot on the remiges of X. polyglotta. 



P. 30. Knipolegus should be written Cnipolegus (k not being used 

 in Latin). 



Vieillot's name climazura being of the same date with Sjjix's name 

 mystacea (not mystax), and the former word being dog-Latin, it is 

 better to call the bird Fluvicola mystacea, Spix. 



The Gubernetes forjicatus, Sw., is the Muscicapa yiperu of Lich- 

 tenstein, not his M. vetula, which last bird is the Milvulus longi- 

 pennis, Sw., and Muscicapa pullata, Bon., figured in Spix, vol. ii. pi. 

 18. The type of Gubernetes should therefore be called G. yiperu 

 (Licht.), unless Vieillot may have given it an earUer name in quoting 

 Azara. 



The generic name Pitangus, Sw., 1827, should be used instead of 

 Saurophagus, Sw., 1831. 



Mr. Gray has transposed the specific names attached to the ge- 

 nera Saurophagus and Scaphorhynchus . The type of the former ge- 

 nus is the Lanius sulphuratus, Lin., and of the latter, Lanius jntan- 

 gua, Lin., both of which are accurately described and figured by 

 Brisson. Scaphorhynchus pitangua (Lin.) is the Megastoma ruficeps 

 of Swainson, not his M. flaviceps, as is proved by the words aurantia 

 and/ulva, applied by Briss. and Lin. to the coronal spot. 



The name Tyrannus was first used generically by Lac^pede in 

 1799. 



It does not appear why Mr. Gray has changed to Myiobius the 

 name Tyrannula, defined by Mr. Swainson in 1827, and typified by 

 the Muscicapa barbata, Gm. 



P. 31. Mr. Gray seems to be justified in imposing his name Pa- 

 chyrhamphus on the restricted genus Pachyrhynchus of Spix, the lat- 

 ter name being justly cancelled as a mere synonym of Tityra, 

 Vieill. 



The genuine Lanius cay anus of Lin. and Briss. is not the Psaris 

 cayanensis of Swainson, but his P. guianensis, distinguished by the 

 naked lores, and by having two-thirds of the beak red. I can find 

 no description of Swainson's P. cayanensis, but I infer that he means 

 the species with plumed lores, the beak wholly black, and a small 

 black spot on the chin {Lanius inquisitor, Olfers, and Licht. Verz., 

 p. 50). 



For Platysteira write Platystira (the et in Greek being made i in 

 Latin). 



P. 32. For Leucocirca write Leucocerca. 



The genera Culicivora and Setophaga would be more naturally 

 placed among the Sylvicolinee, as is done by Mr. Swainson, ' Classif. 



