ORDER PULMOXARL^. 433 



Tarantula, Fahr., 



Have the abdomen attached to the thorax by a pedicle, or by 

 a portion of their transverse diameter, without laminae, in the 

 form of a comb, at its inferior base, or sting at the extremity. 

 Their stigmata, four in number, are situated near the origin of 

 the belly, and covered with a plate. Their antennae-pincers, 

 or forceps (mandibles of authors), are talon-like, or simply 

 terminated by a mobile hook. Their tongue is elongated, very 

 narrow, in the form of a dart, and concealed. They have but 

 two jaws, which are formed by the first articulation of their 

 palpi. 



They all have eight eyes, three of which on each side, near 

 the anterior angles, are disposed triangularly ; and two near 

 the middle, at the anterior edge, are placed on a common 

 tubercle, or a small eminence, one on each side. The palpi 

 are spiny. The tarsi of the two anterior feet differ from the 

 others : they are composed of several articulations, in the form 

 of a thread or bristle, and without a little claw at the end. 



These arachnides inhabit only the very warm climates of 

 Asia and of America. Their habits are unknown. At the 

 present day we form two genera of them. 



Phrynus, 



Which have the palpi terminating in a talon, the body much 

 flatted; the thorax large, almost in the form of a crescent; 

 the abdomen without tail ; and the two anterior tarsi very 

 long, very slender, and similar to hair-like antennae. 



Thelyphonus, Latr., 



Are distinguished from Phrynus by their palpi being shorter, 

 thicker, terminating in a pincers, or in two united claws, by 

 their long body, with the thorax oval, and the end of the ab- 

 domen provided with an articulated thread, forming a tail ; 

 VOL. XIII. 2 r 



