ORDER PULMONARIiE. 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 fi'om 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 



