ORDER PULMONARliE. 
397 
terminates it, a transverse series of spines, or corneous and 
mobile points, disposed in the manner of a rake. The hairs 
which furnish the under portion of their tarsi, form a thick 
and tolerably broad brush, edging, and usually concealing 
the hooks. The masculine sexual organs consist in a single 
scaly piece, terminated in an entire point, that is, without 
notch or division. Sometimes it has almost the form of an 
ear-pick; sometimes, and most frequently, it is globular un- 
derneath, and then grows narrow, terminating in a point, and 
forming a sort of arched hook. 
This division is composed of the largest species of the 
family, and some of which, in a state of repose, occupy a 
circular space of six or seven inches in diameter, and some- 
times seize on humming birds and colibris. They establish 
their domicile in the clefts of trees, under their bark, in the 
interstices of stones, or rocks, or on the surfaces of the leaves 
of divers vegetables. The cell of the Mygale avicularia has 
the form of a tube narrowed to a point at its posterior ex- 
tremity. It is composed of a white web, compact in its tissue, 
very fine, semi-transparent, and similar in appearance to 
muslin. M. Goudot has given me one, which, unfolded, was 
seven or eight inches long, by about two wide, measured in its 
greatest transverse diameter. The cocoon of the same species 
was of the form and size of a large nut. Its envelope, com- 
posed of a silk similar in kind to that of its habitation, was 
formed of three layers. It appears that the young are hatched 
there, and undergo their first moulting. M. Goudot informed 
me, that from a single one, he took out a hundred young 
ones. 
This mygale (. Aranea avicularia, Lin,; Kleem, insect xi. 
and xii., male) is about an inch and a half in length, blackish, 
very hairy, with the extremity of the palpi, of the feet, and 
the lower hairs of the mouth reddish. The genital organ of 
