Char. Upper parts generally, with head and neck all round to the upper part of the breast, black; the rump usually tinged with ashy. Middle of breast and of belly white; sides chestnut; under tail-coverts similar, but paler. Entire outer webs of scapulars and of dorsal feathers immediately above them, and of ends of primary and secondary coverts, to the shaft, with edges of outer webs of three innermost tertials, and of the second to the fifth primaries, conspicuously white. Whole outer web of the first and ends of the first to the fourth tail-feathers, white, the amount diminishing not very rapidly. Outermost quill longer than ninth, sometimes than eighth, nearly always exceeding the secondaries; third quill longest; fourth scarcely shorter. Length about 8 inches; wing, 4.40; tail, 4.10; hind toe and claw, .74. Female paler brown instead of black; the rufous, seen in P. erythrophthalmus, tinged with ashy.
Hab. High central plains of Upper Missouri, Yellowstone, and Platte; basin of Missouri River, especially west, including eastern slope of Rocky Mountains; San Antonio, Texas (Dresser, Ibis, 1865, 492).
P. arcticus is similar in form to P. erythrophthalmus, which, however, is readily distinguished by the entire absence of white on the scapulars and wing-coverts. The amount of white on the tail decreases much less rapidly. The differences between it and P. oregonus will be found detailed under the head of the latter species.
One specimen (8,193) from Fort Leavenworth, with a few white spots only on the scapulars, may perhaps be considered a hybrid between arcticus and erythrophthalmus.
In some specimens the interscapulars are edged externally with white. The feathers of throat and sides of head show occasional concealed spots of white about the middle. As in erythrophthalmus, the bases of the primaries are white along the outer edge, showing under the primary coverts, sometimes, but perhaps not generally, confluent with the white towards the end of the same web.
The female is of a dull ashy-brown, difficult to describe, but with only a slight tinge of the rufous seen in P. erythrophthalmus, which is most distinct on top of head and back. There is an almost inappreciable ashy superciliary stripe.
The young bird resembles in general appearance that of megalonyx, but is lighter colored, and with the dusky streaks on the jugulum much narrower. The brown above is as light as in erythrophthalmus, but without the reddish cast seen in the latter, and not blackish, as in megalonyx.
Habits. The Saskatchewan or Arctic Ground Finch was first met with by Sir John Richardson. It was observed by him only on the plains of the Saskatchewan, where he had no doubt of its breeding, as one specimen was killed late in July. It was said to arrive in that region in the end of May, and to frequent shady and moist clumps of wood. It was generally seen on the ground. Its habits, so far as they were observed, correspond with those of the Towhee Bunting, which it closely resembles in external appearance. It feeds on grubs, and is a solitary and retired, but not a distrustful bird.
Besides its occurrence in the Valley of the Saskatchewan, these birds have often been found on the high central plains of the Upper Missouri, on the Yellowstone and Platte Rivers. Audubon met with it at Fort Union. Dr. Hayden obtained it on the Yellowstone, in August; at Fort Lookout, June 22; at Bijou Hills, from May 1 to the 15th; at Bon Homme Island, May 9. Dr. Cooper obtained it at Fort Laramie in September. Mr. Allen found it in Colorado, where it was more abundant on the foothills than on the plains. He also found this species an abundant inhabitant of the thickets in the valley of the Great Salt Lake, in its habits strongly resembling the common birds of the Eastern States. Though its song is also somewhat similar, its call-note, he adds, is totally different, very nearly resembling that of the Catbird.
Dr. Woodhouse met with but few of these birds either in the Indian Territory or in New Mexico. Mr. Dresser, in November, 1863, when hunting in the Bandera Hills, noticed several of these birds near the camp, and obtained several near San Antonio during the winter. None of these birds appear to have been observed in the Arctic regions beyond the Saskatchewan Plains.
Mr. Nuttall met with this species on the western slopes of the Rocky Mountains, but as he apparently did not appreciate the difference between this form and the oregonus, we cannot determine with certainty to which his descriptions apply in all cases. He found it, in manners and habits, the counterpart of our common eastern species, frequenting forests and scratching among the dead leaves among bushes and thickets. He describes it as more shy than the common species. If the nest be invaded, the male shows more boldness, and reiterates his complaints until the cause of his alarm is removed. He speaks of its warble as quaint and monotonous, and very similar to the notes of the Towhee,—but the note of our bird, towhee, is never heard west of the mountains. In its stead this bird is said to have a note like the mew of a cat.
The egg of the arcticus is oval in shape, and measures one inch in length by .70 in breadth. It has a white ground, but is so generally and so thickly covered with fine dots of umber-brown, intermingled with paler markings of lavender and neutral tints, that the ground can hardly be distinguished.
Common Characters. Grayish-brown above, with a more or less appreciable rufous tinge on the crown. A patch covering the throat, ochraceous or white, contrasting with the surrounding portions, and encircled more or less completely, especially posteriorly, by dusky spots; lores like the chin. Crissum deep ochraceous, the lower part of abdomen tinged more or less with the same.
A. No trace of white tips to middle wing-coverts. Throat ochraceous.
a. Crown only faintly tinged with rufous.
1. Abdomen pale grayish-brown; throat and lores deep reddish-ochraceous; the deep ochraceous confined posteriorly to lower tail-coverts. Wing, 3.90; tail, 5.00. Hab. California … var. crissalis.
2. Abdomen distinctly white centrally, but surrounded by grayish laterally and anteriorly; throat and lores pale ochraceous; deep ochraceous of crissum extending forward over lower part of abdomen. Wing, 3.80; tail, 4.00. Hab. Mexico … var. fuscus.24
b. Crown very distinctly rufous.
3. The ochraceous of posterior under parts spreading over whole lower part of abdomen and flanks. Ochraceous of the throat palest anteriorly, the chin and lores being almost white; it spreads over the jugulum also, outside the series of rather scattered dusky spots. Whole breast white. Wing, 3.80; tail, 4.30. Hab. Southern Middle Province of United States … var. mesoleucus.
4. The ochraceous of under parts confined to crissum and anal region; ochraceous of the throat palest posteriorly, where it is nearly white, and confined within the encircling series of rather coalesced dusky spots. Abdomen, only, white. Wing, 3.80; tail, 4.20. Hab. Cape St. Lucas … var. albigula
B. Middle coverts distinctly, and greater obsoletely, tipped with white. Throat white crossed by an ochraceous band.
5. Crown without a trace of rufous. Dusky spots surrounding the white gular patch, coalesced posteriorly into a narrow crescent. Whole breast and abdomen white, somewhat broken anteriorly. Flanks and lower tail-coverts ochraceous. Wing, 3.30; tail, 3.70. Hab. Mexico … (var. ?) albicollis25
Pipilo fusca, Cassin, Illust. I, IV, 1853, 124, pl. xvii (the figure seems to be of the California species, the description more like mesoleucus).—Newberry, Zoöl. Cal. & Or. Route, Rep. P. R. R. VI, IV,
Sp. Char. Above dull olive-brown; the top of head having the central portion of feathers tinged (inconspicuously and obscurely) with rufous. Chin and throat pale rufous, bordered by dusky streaks; a single dusky spot in lower part of jugulum. Belly and flanks behind, anal region and crissum, rather darker rufous. Sides grayish-olive, lighter than the back, tingeing the breast, and leaving only a small patch in the centre of under parts white, shading into the surrounding ashy-brown. Fourth and fifth quills longest; first shorter than ninth, or than secondaries.
The specimen described is from the city of Mexico, and belongs to Mr. G. N. Lawrence; others before us are from Temiscaltepec (the original locality of Swainson’s type), Guadalaxara, and Tepic.
While admitting the strong probability that the different brown
Two descriptions given by Swainson, copied below, of the
This “species” may fairly be considered as one extreme of the series of which
