These views he shared more or less with Vigors and Swainson, and to them attention will be immediately especially invited, while consideration of the scheme gradually developed from 1831 onward by Charles Lucien Bonaparte, and still not without its influence, is deferred until we come to treat of the rise and progress of what we may term the reformed school of ornithology.
This was William Sharpe Macleay, a man of education and real genius, who in 1819 and 1821 brought out a work under the title of Horae Entomoiogicae, which was soon after hailed by Vigors as containing a new revelation, and applied by him to ornithology in some vigoes.
In the following year Vigors returned to the subject in some papers published in the recently established Zoological Journal, and found an energetic condisciple and coadjutor in Swainson, who, for more than a dozen years - to the end, in fact, of his career as an ornithological writer was instant in season and out of season in pressing on all his readers the views he had, through Vigors, adopted from Macleay, though not without some modification of detail if not of principle.
Macleay indeed never pretended to a high position in this branch of science, his tastes lying in the direction of Entomology; but few of their countrymen knew more of birds than did Swainson and Vigors; and, while the latter, as editor for many years of the Zoological Journal, and the first secretary of the Zoological Society, has especial claims to the regard of all zoologists, so the former's indefatigable pursuit of Natural History, and conscientious labour in its behalf-among other ways by means of his graceful pencil-deserve to be remembered as a set-off against the injury he unwittingly caused.
It was limited, however, to what he called Insessores, being the group upon which that name had been conferred by Vigors (Trans.
Herein he divided the class A y es into two subclasses, to which he applied the names of Insessores and Grallatores (hitherto used by their inventors Vigors and Illiger in a different sense), in the latter work relying chiefly for this division on characters which had not before been used by any systematist, namely that in the former group monogamy generally prevailed and the helpless nestlings were fed by their parents, while the latter group were mostly polygamous, and the chicks at birth were active and capable of feeding themselves.