6. P. hudsonicus. Side of neck grayish. Back, etc.,
smoky-gray. Sides dark rusty-brown. Wing, 2.45; tail, 2.45;
tarsus, .62; middle toe, .35; graduation of tail, .30.
(17,101, Halifax, N. S.) _Hab._ Arctic America; south to
northern boundary of the United States (except to westward).
7. P. sibiricus.[28] Side of neck white. Back, etc., rusty
ochraceous-gray. Sides rusty ochraceous. Wing, 2.70; tail,
2.80; tarsus, .66; middle toe, .36; graduation of tail, .30.
_Hab._ Europe.
Parus montanus, GAMBEL.