CHIFF-CHAFF WARBLER. 153 
sexes similar in colours, males rather brighter. 
Length of the latter about four inches and a 
half. 
From those Tree Warblers, we may pass to the 
beautiful and active Gold-crests, which prepare 
us by their habits for the Parian ce. 
Regulus, Pay . — Bill nearly straight, slender, 
tip very slightly notched; wings with the 
first quill short, third the longest ; tail sub- 
furcate, points of its feathers mucronate ; 
feet with the hallux and its claw propor- 
tionally strong. R. auricapillus. R. regu- 
loides, fyc. 
Note . — Nostrils in some covered with a single 
plumulet, directed forwards. 
This little genus, confined, so far as we know, 
to Europe, North America, and Northern Asia, 
