[Illustration: _Asturina plagiata._] Mr. Robert Ridgway has met with this Hawk as far to the north as Southern Illinois. It was seen and twice shot at on the 19th of August, 1871, on Fox Prairie, in Richland County. Mr. Ridgway came across it while hunting Swallow-tail and Mississippi Kites. The bird, while being annoyed by these Hawks, was well seen, and there cannot be the slightest doubt as to its identity. Mr. Robert Owen found this Hawk, known in Guatemala by the local name of _Gavilan_, a common name for the whole race of birds of prey, breeding at San Geronimo, April 3, 1860. The nests are usually found in the high trees which are scattered over the plain, and not unfrequently within a few yards of the Indian ranchos. Two eggs seemed to be the complement laid by one bird. These eggs are described by Mr. Owen as all white, without any natural coloring. The inner coating of the shell is sea-green, seeming to confirm the apparently close connection between the genera of _Astur_ and _Asturina_. Mr. G. C. Taylor met what he presumed to be this Hawk in great abundance at Comayagua, Honduras, in January. He saw a pair making their nest on the top of a lofty cotton-tree. Captain Bendire found this species not uncommon and breeding in the vicinity of Tucson, in Arizona. He found two nests, one of which was taken June 6, the other a few days later. They were very slightly built of sticks and strips of bark, and placed in low trees on the banks of Reledo Creek. The nest contained two eggs. These are of a rounded oval shape, are quite tapering at one end and rounded at the other. They are of a uniform bluish-white color and unspotted, and measure 2.00 inches in length by 1.60 inches in breadth. GENUS ANTENOR, RIDGWAY. _Antenor_, RIDGWAY. (Type, _Falco harrisi_, AUD.) _Craxirex_, AUTHORS, not of GOULD.[85] [Illustration: =42559=, ♀. ¼ =42559=, ♀. ½ =42559=, ♀. ½ _Parabuteo harrisi._] GEN. CHAR. Similar to _Asturina_, but form heavier, the bill and wings more elongated, the tail slightly rounded, and the lores almost naked. Bill very much as in _Asturina_, but more elongated, the top of the cere longer in proportion to the culmen, and the commissural lobe more anterior; the upper and lower outlines more nearly parallel. Nostril oval, horizontal, with an exposed cartilaginous tubercle. Lores nearly naked, with scant bristles. Wing long (much as in _Buteo_); the fourth or fifth quill longest, and the first shorter than the eighth to the tenth; outer four with inner webs sinuated. Tail long, more than two thirds the wing; even or slightly rounded. Feet robust, when outstretched reaching nearly to the end of the tail; tarsus nearly twice the length of the middle, very robust, the frontal and posterior rows of scutellæ very distinct; outer toe longer than the inner; claws strong, well curved, and acute. Sexes alike; young and old plumages very different.