The Peucæa cassini is said, by Mr. Sumichrast, to be a resident species in the valley of Orizaba, in the State of Vera Cruz, Mexico, and to be generally distributed throughout the temperate region of that district. It is very probable, however, that he has in view the Mexican race of P. æstivalis (var. botterii), and not the present species.
Mr. J. A. Allen, who considers this bird only a western form of P. æstivalis, mentions (Am. Naturalist, May, 1872) finding it quite frequently near the streams in Western Kansas, where its sweetly modulated song greets the ear with the first break of dawn, and is again heard at night till the last trace of twilight has disappeared. Mr. Allen also states, in a letter, that this bird was “tolerably common along the streams near Fort Hays, but very retiring, singing mostly after nightfall and before sunrise, during the morning twilight. When singing, it had the habit of rising into the air. I shot three one morning thus singing, when it was so dark I could not find the birds. The one I obtained does not differ appreciably from specimens from Mr. Cassin’s collection, labelled by him Peucæa cassini, collected in Texas.”
Mr. Ridgway regards this record of the manners of this bird, while singing, as indicating a specific difference from P. æstivalis. The latter, in Southern Illinois, has never been heard by him to sing at night, or in the morning, nor even on the wing; but in broad midday, in the hottest days of June, July, and August, he often heard them singing vigorously and sweetly, as they perched upon a fence or a dead tree in a field, exactly after the manner of our common Spizella pusilla.
Among Dr. Heermann’s notes, quoted by Mr. Dresser, is one containing the statement that he found this species not rare on the prairies near the Medina River, in Texas, where it breeds. Mr. Dresser also states that when at Howard’s Ranche, early in May, he found this bird by no means uncommon. He confirms Dr. Heermann’s account, that it is easily distinguished as it rises in the air, from a bush, with a peculiar fluttering motion of the wings, at the same time singing, and then suddenly dropping into the bushes again. He adds that, in his absence, Dr. Heermann procured the eggs of this species on the Medina, and while he was himself travelling in July towards Loredo, he found a nest which he was fully confident belonged to this bird. It was placed in a low bush not above a foot from the ground, and in its construction resembled that of the Poospiza bilineata. The eggs were three in number, pure white, closely agreeing with those taken by Dr. Heermann, and larger and more elongated than those of the bilineata.
An egg of this species, taken in Texas by Dr. H. R. Storer, the identification of which, however, was incomplete, is more oblong than the eggs of P. æstivalis, and smaller, measuring .72 by .58 of an inch. It is pure white also.
Ammodromus ruficeps, Cassin, Pr. A. N. Sc. VI, Oct. 1852, 184 (California).– Ib. Illust. I, V, 1854, 135, pl. xx. Peucæa ruficeps, Baird, Birds N. Am. 1858, 486.—Cooper, Orn. Cal. 1, 1870, 218.
Sp. Char. Above brownish-ashy. The crown and nape uniform brownish-chestnut, the interscapular region and neck with the feathers of this color, except around the margins. A superciliary ashy stripe, whiter at the base of the bill. Beneath pale yellowish-brown, or brownish-yellow, darker and more ashy across the breast and on the sides of body; middle of belly and chin lighter; the latter with a well-marked line of black on each side. Edge of wing white. Under tail-coverts more rufous. Legs yellow. Length, 5.50; wing, 2.35; tail, 2.85.
Hab. Coast of California, to Mexico; ? Oaxaca, March (Scl. 1859, 380); ? Vera Cruz, temperate region; resident (Sum. M. B. S. I, 552).
This plainly colored species has the bill rather slender; tail rather long, and considerably rounded; the outer feathers .40 of an inch shorter than the middle; the feathers soft, and rounded at the tip. The wing is short; the primaries not much longer than the tertials; the second, third, fourth, and fifth nearly equal; the first scarcely longer than the secondaries.
There is a blackish tinge on the forehead, separated by a short central line of white, as in Spizella socialis. The eyelids are whitish, and there is a short black line immediately over the upper lid. There is a faint chestnut streak back of the eye. The chestnut of the nape is somewhat interrupted by pale edgings. The blotches on the back melt almost insensibly into the colors of the margins of the feathers. The outer edges of the secondaries and tertials, and the outer surface of the tail, are yellowish-rusty.
This bird is similar in general appearance to the P. æstivalis, but has the head above more continuous chestnut; the black cheek-stripe more distinct, and the edge of wing whitish, not yellow, the bill more slender. A Mexican specimen has a stouter bill.
The P. boucardi of Sclater (= ruficeps, var. boucardi; see table, p. 634), from Mexico, is exceedingly similar, it being very difficult to present the differences in a diagnosis. This trouble is partly the result of the insufficient series at our command, for there are such different combinations of colors, according to the season, that it is almost impossible to select the average characters of two definable forms.
Habits. This species was first described, in 1852, by Mr. Cassin, from a specimen obtained in California by Dr. Heermann. Very little is known as to its history, and it appears to have been generally overlooked by naturalists who have studied the ornithology of that State. The extent of its distribution or of its numbers remains unknown,—a circumstance due undoubtedly to the nature of the country which it frequents.
Dr. Heermann states that in the fall of 1851 he shot on the Cosumnes River a single specimen of this bird from among a large flock of Sparrows of various kinds. In the spring of the following year, among the mountains, near the Calaveras River, he found it quite abundant. It was then flying in pairs, engaged in picking grass-seed from the ground, and when started it never extended its flight beyond a few yards. Its notes, in their character, reminded him of the ditty of our common little Chipping Sparrow (Spizella socialis). He obtained several specimens. Its flight seemed feeble, and when raised from the ground, from which it would not start until almost trodden on, it would fly but a short distance, and almost immediately drop again into the grass.
Dr. Cooper has only met with this species on Catalina Island, in June, where a few kept about the low bushes, feeding on the ground. They were very difficult even to get a sight of. He heard them sing a few musical notes, that reminded him of those of the Cyanospizæ. They flew only a short distance, and in their habits reminded him of the Melospizæ. Their favorite places of resort he supposes to be pine woods, as in the eastern species.
The fact that this species has been found by Mr. Sumichrast to be a permanent resident throughout all the temperate regions of Vera Cruz is a very interesting one, and is suggestive of different manners and habits from those supposed to belong to it as a bird allied with the Ammodrami. They are abundant, and breed there, as in the United States, but nothing is given throwing any positive light upon their general habits.
Embernagra, Lesson, Traité d’Ornith., 1831 (Agassiz). (Type, Saltator viridis, Vieillot.)
Gen. Char. Bill conical, elongated, compressed; the upper outline considerably curved, the lower straight; the commissure slightly concave, and faintly notched at the end. Tarsi lengthened; considerably longer than the middle toe. Outer toe a little longer than the inner, not reaching quite to the base of the middle claw. Hind toe about as long as the middle without its claw. Wings very short, and much rounded; the tertials nearly equal to the primaries; the secondaries a little shorter; the outer four primaries much graduated, even the second shorter than any other quill. The tail is moderate, about as long as the wings, much graduated; the feathers rather narrow, linear, and elliptically rounded at the end; the outer webs more than usually broad in proportion to the inner, being more than one third as wide. The upper parts are olive-green, the under whitish.
The position of this genus is a matter of considerable uncertainty. On some accounts it would be better placed among the Spizinæ.
There are numerous tropical species of this genus; none of them are nearly