This race is similar in general appearance to P. crissalis, but the olive-brown and rufous are both of a lighter shade. The crown is of a decided rufous, conspicuously different from the back, instead of nearly the same tint. The light reddish under the head is wider throughout, and
extends down to the upper part of the breast, blending with the colors of the breast and belly, instead of being narrower, more sharply defined, and restricted to the chin and throat; it is palest anteriorly, the chin and lore being almost white. The isolated larger spot on the breast is more conspicuous; the breast and belly are quite pure white, shaded with obsolete brownish blotches, instead of being uniform grayish-brown, with only an approach to whitish in the very middle. The edges of the wing and tail feathers are a good deal lighter, the outer web of the first primary being sharply edged with pure white, instead of obscure grayish-brown. The size generally is rather smaller, the wings more pointed.
Compared with P. fuscus, we find the tail decidedly longer; the wing more pointed; the first quill about equal to the eighth, instead of shorter than the secondaries. The colors generally are paler; the cap of head bright distinct rufous in strong contrast with the other plumage, instead of being only very obscurely tinged with that color. The white of belly is purer, and extends farther forward, displacing the ashy tinge almost to the buff of the throat.
If we consider all the brown Pipilos as modifications of one primitive species, it will be well to consider the Arizonan and New Mexican bird as the central figure around which the others are grouped. The common character will then be varied in the California race, crissalis, by the absence of decided rufous on crown, a darker shade of color, and an extension of the gray of sides over the whole under parts, almost entirely displacing the white. The wing is more rounded, and the general dimensions larger southward on the central plains of Mexico; the general tints are almost precisely as in the California bird, except that the white of belly is very evident; but the chestnut cap and extended whiteness of belly, together with the pointed wing of mesoleucus, are wanting. In P. albigula of Cape St. Lucas we have the general characters of mesoleucus, with paler colors, more restricted spots encircling throat, and a tendency to white in its lower part. In this it approaches albicollis of Southwestern Mexico.
Habits. This little-known form was first obtained by Dr. Kennerly, naturalist to the Pacific Railroad Expedition on the 35th parallel, under Lieutenant Whipple. He met with it at Bill Williams Fork, in Arizona, February 5, 1854. It was described by Professor Baird the following June. Dr. Kennerly furnished at the time no information in regard to its habits.
Dr. Heermann, in his Report on the birds observed in Lieutenant Parke’s expedition, mentions having met with this species in the vicinity of Tucson. Its habits, so far as he could judge of them from his opportunities, appeared very similar to those of Pipilo aberti.
Lieutenant Couch met with this species at Santa Catalina, Mexico, in April, 1853, but furnishes no information in reference to its manners. Mr. J. H. Clark, who obtained a specimen near the Copper Mines of the Mimbres, states that they were met with in abundance in the deep valleys or
cañons of that region. They were almost always in or about the thick clumps of bushes, several usually being in company.
Dr. Kennerly, who met with them on a second trip, in June, 1855, near Los Nogales, in Mexico, speaks of them as not very common in that region. He found them preferring the dense bushes in the valleys. When approached, they became very restless, flying from one bush to another, accompanying their motions with very peculiar notes, which he does not describe.
Dr. Coues found this species abundantly distributed throughout the warmer portions of New Mexico and Arizona, from the valley of the Rio Grande to that of the Colorado. He did not observe any at Fort Whipple, though they were found breeding some twenty-five miles to the southward. He found them associating freely with Pipilo aberti, and inhabiting the same regions. The two birds have very similar habits.