Mr. 11. 13. Sliarpc on the Genus Glaucidium. 53 



Peru. Messrs. Salviu and Godman have a female from 

 Arequipa^ obtained by Mr. H. Whitely, and representing the 

 true G. infuscatum, and also a ferruginous specimen from 

 Lima, having a uniform tail, like the Brazilian examples. 



Total 



length. Wing. Tail. Tarsus. 



a, 2 ad. Arequipa ( Whitely) 7-5 40 3-2 0-85 



h, ad. Lima {Nation) 7-0 3-9 2-9 0-8 



Bolivia. Two specimens from this country, collected by Mr. 

 Brydges, are preserved in the British Museum, one being 

 greyish brown, of the ordinary G. infuscatum type, and the 

 other ochraceous brown, spotted on the back like the Ecuador 

 bird noticed above : the latter has a striped head ; but the 

 greyish bird has the crown partly spotted and partly streaked. 



Total 

 length. Wing. Tail. Tarsus. 



a, ad. BolWm {Brydges) 6-5 3-75 2-G 0-75 



The conclusion forced upon me after an examination of the 

 foregoing series is, that Mr. Ridgway is right in believing in 

 a northern and a southern form of Glaucidium infuscatum, but 

 his G. ferrugineum must be regarded as the rufous phase of 

 these grey-plumaged birds. The ranges of these two birds 

 are not so easily made out ; but I fancy, from the series before 

 me, that the small form extends from the Southern States of 

 North America throughout Mexico and the whole of Central 

 America to Panama ; and thence, from Venezuela and New 

 Granada southwards throughout Amazonia to Brazil, Peru, 

 and Bolivia, it is replaced by the larger form. 



The differences between these two species it is not easy to 

 define. The large bird from Brazil difllers chiefly in size and 

 in having more distinct spots on the crown, back, and sides 

 of the breast, so that I cannot uuderstand Mr. Ridgway 

 stating that the latter parts are "not speckled.^' The 

 northern form is smaller, and, as Mr. Ridgway states, is 

 " greyish umber,'' instead of being " dark sepia-brown ; " the 

 spots on the back are obsolete or concealed ; and tlie spots on 

 the tail are only six in number, instead of seven as in the 

 larger form. 



