40 MANUAL OF NATURAL HISTORY. 



Many have the central portion of the feathers 

 light with a dark margin, or dark with a light 

 margin, giving them a mottled appearance. 



III. SUB-ORDER.— Dentirostkal Birds (Dentirostres). 



Upper mandible more or less notched near tip, 

 and bent over lower ; gape often furnished with 

 bristles ; tarsi comparatively slender ; toes formed 

 for perching. 



13. Family. — Warblers (Lusciniidse). Bill gene- 



rally slender, straight, more or less depressed 

 at base, which is sometimes furnished with 

 bristles ; nostrils placed in a groove ; tarsi 

 generally elevated, slender ; claws curved, 

 acute ; eyes, in most, bold and prominent ; 

 plumage soft and loose. Mostly of solitary 

 habits. 



The Tit-mice (Parince) have the bill stronger 

 and more conical ; and the tarsi, toes, and 

 claws stouter than most others. 



14. Family. — Thrushes (Turdidse). Bill strong, 



sides compressed more or less, culmen cari- 

 nated, straight or curved to tip, which in 

 some cases is considerably bent over, denti- 

 tion variable ; gape sometimes bristled ; tarsi 

 and toes strong ; hind claw rather long ; 

 wings moderate, generally rounded. 



15. Family. — Flycatchers (Muscicapidse). Bill de- 



pressed, broad at base, narrowed to tip, where 

 upper mandible is suddenly bent over and 

 notched ; gape furnished with bristles ; nos- 



