Mr. Salvin met with what he presumed to be this species in Central America, ascribing the immense flights of Hawks seen by him in the month of March, in the Pacific Coast region, migrating in a northwesterly direction, to this Kite. The bird was well known to the Spaniards under the name of _Asacuani_,—a term that has become proverbial for a person who is constantly wandering from place to place. Mr. Leyland obtained a single specimen of the _Rostrhamus_ near the Lake of Peten. In the spring of 1870, Mr. Maynard met with several individuals of this species among the Florida everglades. He first observed one on February 18, but was not able to secure it. Visiting the same spot ten days later, with Mr. Henshaw, three birds of this species were shot, and the nest of one was discovered. It was at that time only partly completed, was small, flat, and composed of sticks somewhat carelessly arranged. It was built upon the top of some tall saw-grass, by which it was supported. This grass was so luxuriant and thick that it bore Mr. Maynard up as he sought to reach the nest, which did not contain any eggs. On the 24th of March, Mr. Maynard discovered another nest of this species. It was built in a bush of the _Magnolia glauca_, and was about four feet from the water. It contained one egg. It was about one foot in diameter, was quite flat, and was composed of sticks carelessly arranged, and lined with a few dry heads of the saw-grass. The female was shot, and found to contain an egg nearly ready for exclusion, but as yet unspotted. Other eggs were subsequently procured through the aid of Seminole Indians, by whom this Hawk is called _So-for-funi-kar_. [Illustration: _Rostrhamus sociabilis_ (young).] The usual number of eggs laid by this Kite is supposed to be two, as in three instances no more were found, and this was said to be their complement by the Indians. It also appeared to be somewhat irregular in the time of depositing its eggs. This Hawk is described as very sociable in its habits, unlike, in this respect, most other birds of prey. Six or eight specimens were frequently seen flying together, at one time, over the marshes, or sitting in company on the same bush. In their flight they resemble the common Marsh Hawk, are very unsuspicious, and may be quite readily approached. The dissection of the specimens showed that this bird feeds largely on a species of freshwater shell (_Pomus depressa_ of Say).