272 BIRDS OF WESTERN AND 



44. Vireosylvia Jlavoviridis Cassin. 

 Mazatlan, Grayson ; Rosario, Xantus. 



« Not a common species in the locality of Mazatlan, usually met with in the mangrove swamps ; specimens 

 were shot by me in April and June. I have found them more abundant among the evergreens on Holder- 

 ness Island. None are seen after August, migrating probably to Central America after breeding." 



45. Vireo solitarius (Wils.). 

 Mazatlan, Grayson. 



" This species was shot in April near Mazatlan ; I have only seen one specimen." 



46. Vireo plumbeus Coues. 

 Elains of Colima, Xantus. 



47. Vireo atricapillus Woodhouse. 

 Mazatlan, Grayson. 



48. Vireo ochraceus Salvin. 

 Mazatlan, Grayson. 



49. Vireo hypochryseus Scl. 



" " Proc. Bost. Soc. of N. H., xiv., p. 281. 



Tres Marias Islands, Grayson. 



Fam. Lakiid^. 



50. Collurio ludovicianus var. excuhitoroides Sw. 

 Mazatlan, Grayson ; Colima, Xantus. 



" Common from October to April, probably migrates to the high central plains in summer.'' 



Mr. J. A. AUen (Bull. Mus. Comp. Zool., Cambridge, ii., p. 270) considers the " so-called 

 C. excuhitoroides " not to be specifically distinct from C. ludovicianus. 



Messrs. Dresser and Sharpe (Proc. Zool. Soc, London, 1870, p. 596) express them- 

 selves as beiag similarly convinced by an examination of " thoroughly typical L. excuhito- 

 roides and L. ludovicianus." They state in addition that : — "In the British Museum, 

 there is a specimen sent to this country by Prof. Baird, under the name of Lanius elegans, 

 from Mexico. This bird was kindly shown to us by Mr. G. R. Gray ; and we were glad to 

 see it, as it confirms our opinion that the Lanius elegans of the American authors is 

 nothing more than L. ludovicianus." 



I was told by Prof Baird that the specimen of Lanius sent to the British Museum labelled 

 L. elegans must have been so named inadvertently by some of the employes of the Smith- 

 sonian Institution, as the only specimen he supposed to be that species, is in the Museum of 

 the Philadelphia Acad, of Sciences. On a re-examination of that specimen, he came to the 

 conclusion that it was a local race of Collurio ludovicianus, and in his forthcoming work on 

 the Birds of North America, has described it under the name of C. rohustus. 



Under the species Lanius lahtora, Messrs. Dresser and Sharpe, 1. c, p. 598, say, " We 

 have the advantage of possessing in this country the type specimen of Lanius elegans of 

 Swainson, which is preserved in the national collection. On a close examination this bird 



