Body slender. Tail much longer than wings; much graduated …
_Psaltriparus._
_Bill with outlines nearly straight._
Head with compact feathers. Wings pointed.
Body slender. Tail rather shorter than the wings; nearly even …
_Auriparus._
[Illustration: PLATE VI.
1. Lophophanes bicolor, _Bon._ Ill., 29679.
2. “ atricristatus, _Cass._ Tex., 12107.
3. “ inornatus, _Cass._ Cal., 37051.
4. “ wollweberi, _Bon._ Ariz., 40742.
5. Polioptila cærulea, _Scl._ Ill., 10213.
6. “ plumbea, _Baird_. Ariz., 11541.
7. “ melanura, _Lawr._ Cal., 7191.
8. Chamæa fasciata, _Gamb._ Cal., 5924.]