Audubon’s observations relative to the Crow Blackbird are chiefly made with reference to those seen in Louisiana, where this race is probably the only one found. The only noticeable peculiarity in his account of these birds is his statement that the Blackbirds of that State nest in hollow trees, a manner of breeding now known to be also occasional in the habits of the _purpureus_. The eggs of this form appear to exhibit apparently even greater variations than do those of the _purpureus_. One egg, measuring 1.10 inches by .85, has a bright bluish-green ground, plashed and spotted with deep brown markings. Another has a dull gray ground, sparingly marked with light brown; the measurement of this is 1.13 inches by .85. A third has a greenish-white ground, so profusely spotted with a russet-brown that the ground-color is hardly perceptible. It is larger and more nearly spherical, measuring 1.16 inches by .90. A fourth is so entirely covered with blotches, dots, and cloudings of dark cinnamon-brown that the ground can nowhere be traced. Mr. Gideon Lincecum, of Long Point, Texas, writes, in regard to this species, that, in his neighborhood, they nest in rookeries, often on a large live oak. They build their nests on the top of large limbs. In favorable situations four or five nests can be looked into at once. They are at this time full of song, though never very melodious. The people of Texas shoot them, believing them to be injurious to their crops; but instead of being an injury they are an advantage, they destroy so many worms, grasshoppers, caterpillars, etc. They are migratory, and very gregarious. They all leave Texas in the winter, and the same birds return in the spring to the same nesting-places. They lay five eggs in a nest. In Southern Illinois, as Mr. Ridgway informs me, these birds are resident throughout the year, though rather rare during the winter months. They breed in the greatest abundance, and are very gregarious in the breeding-season. On a single small island in the Wabash River, covered with tall willows, Mr. Ridgway found over seventy nests at one time. These were placed indifferently on horizontal boughs, in forks, or in excavations,—either natural or made by the large Woodpeckers (_Hylotomus_),—nests in all these situations being sometimes found in one tree. They prefer the large elms, cottonwoods, and sycamores of the river-bottoms as trees for nesting-places, but select rather thinly wooded situations, as old clearings, etc. In the vicinity of Calais, according to Mr. Boardman, they nest habitually in hollow stubs in marshy borders of brooks or ponds. Var. aglæus, BAIRD. FLORIDA GRAKLE. _Quiscalus baritus_, BAIRD, Birds N. Am. 1858, 556, pl. xxxii (not of _Linn._). _Quiscalus aglæus_, BAIRD, Am. Jour. Sci. 1866, 84.—CASSIN, Pr. A. N. S. 1866, 44.—RIDGWAY, Pr. A. N. S. 1869, 135. _Q. purpureus_, ALLEN, B. E. Fla. 291. [Illustration: Var. _aglæus_.]