MOUSE-COLOURED TYRANT 147 



very minute red spots, irregularly distributed. Mr. 

 Dalgleish says, " Some eggs have only two or three 

 spots, none have more than eight or ten/' 



Mr. Barrows says, " The adults have several of 

 the primaries remarkably attenuated. Young birds 

 appear to acquire these attenuate primaries only 

 after a complete moult. But I took one specimen 

 which showed one or more primaries with tips of 

 ordinary shape but with a line apparently worn into 

 the vane of the inner web, so as to mark out distinctly 

 the attenuate tip, and it seemed as if a little more 

 wearing would cut out a piece which would leave 

 the primary as in the old bird/' 



MOUSE-COLOURED TYRANT 



T&nioptera murina 



Above sandy cinereous, whitish round the eyes ; wings and tail 

 blackish with whitish edgings ; below much paler, throat whitish 

 with slight black striations ; belly and crissum tinged with ochraceous ; 

 under wing-coverts and flanks pale ochraceous ; bill horn-colour ; feet 

 black ; two outer primaries acuminated ; length 7 inches. Female 

 similar, but outer primaries normal. 



THIS species inhabits the Mendoza district, and 

 migrates south in spring* I met with it on the Rio 

 Negro, in Patagonia, where it made its appearance 

 in October. The sexes are alike. The entire upper 

 plumage is dull grey with a pale rufous tinge ; throat, 

 breast, and belly pale buff tinged with grey. It is 

 a solitary bird, restless in manner, has a swift flight, 



