Body full and large. Tail about equal to wings … _Lophophanes._ Head with feathers full, but not crested. Wings and tail rounded. Body full. Tail about equal to wings; rounded … _Parus._ 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.] GENUS LOPHOFHANES, KAUP. _Lophophanes_, KAUP, Entw. Gesch. Europ. Thierwelt, 1829. (Type, _Parus cristatus_.) _Bæolophus_, CABANIS, Mus. Hein. 1850, 1851, 91. (Type, _Parus bicolor_, L.) GEN. CHAR. Crown with a conspicuous crest. Bill conical; both upper and lower outlines convex. Wings graduated; first quill very short. Tail moderately long and rounded. Nests in hollow trees; eggs white with fine red dottings. [Line drawing: _Lophophanes bicolor._ 823 ♂] Of this genus there are several North American species, all agreeing in general characters. One of these, the _L. wollweberi_, is given by Cabanis as typical, while he separates the _L. bicolor_ generically under the name of _Bæolophus_, as having a rather different form of crest, stouter bill and feet, and longer wings. All of our species, however, vary in these characters, each one showing a different combination, so that we prefer to consider all as belonging to the same genus with _P. cristatus_. The species, all of which have the under parts uniform whitish, may be arranged as follows:— L. bicolor. Above plumbeous; forehead black; crown much like the back. _Hab._ Eastern Province United States. L. atricristatus. Above plumbeous; forehead whitish; crown black. _Hab._ East Mexico, north to Rio Grande. L. inornatus. Above olivaceous; forehead and crown like the back. _Hab._ South of Middle and Western Provinces of United States. L. wollweberi. Sides of head banded black and white; crown ash; throat black. _Hab._ S. Rocky Mountains of United States; Mexico to Oaxaca. Lophophanes bicolor, BONAP. TUFTED TITMOUSE; BLACK-FRONTED TITMOUSE.