ZQQ THE ARACHNOIDAE. ^ 295. 



ORDER III. 



Abdomen and cephalothorax unarticulated, distinct from each other. 

 Respiratory organs consisting of tracheae and lungs. 



SUB-ORDER Vir. ARÄNEAE. 



Genera : Mygale, Thomisus, Uptiotes, Lycosa, Dolomedes, Salticns, Seges- 

 tria, Dysdera, Scytodes, Clubio?ia, Drassus, Argyrofieta, Clotho, 

 j\gele?ia, Lachesis, Tegenaria, Micryphantes, Theridion, Lmr/phia, 

 Epeira, Tetragnathus. 



ORDER IV. 



Abdomen articulated. Cephalothorax unarticulated. Respiratory or- 

 gans consisting only of lungs. 



SUB-ORDER VIII. PHRYNIDAE. 

 Abdomen distinct from the cephalothorax. Cheliceres unguiculate. 

 Genera : Thelyphonus, Phrynus. 



SUB-ORDER IX. SCORPIONIDAE. 



Abdomen indistinctly separated from the cephalothorax. Cheliceres 

 forficulate. 



Genera: Scorpio, Buthus, Androctonus. 



BIBLIOGRAPHY. 



Leeuwenhoek. Continuatio arcanorum naturae, 1719, Epist. 138, p. 

 312. 



Roesel. Insekten-Belustigungen, Thl. IV. 1761, p. 241. 



Degeer. Abhandlungen zur Geschichte der Insekten, VII. 1783. 



Hermann. Memoire apterologique, 1804. 



/. F. Meckel. Beiträge zur vergleichenden Anatomie, I. Hft. 2, 1809, 

 p. 105. 



Treviranus. lieber den inneren Bau der Arachniden, 1812. Ver- 

 mischte Schrift, anat. u. physiol. Inhalts. I. 1816. Ueber d. Bau d. Nigua 

 (^Acarus americanus), in his Zeitsch. f. Physiol. IV. 1831, p. 185. 



Serres. Memoires du Mus. d'hist. Nat. V. 1819, p. 86. 



LKOtt Dufoiir. Ann. gener. d. Sc. physiq. d. Bruxelles, IV.-VI. 



/. Midier. Beitrüge zur Anatomie des Scorpions, in Meckel's Arch. f. 

 Anat. 1828, p. 29. 



Lyonet. Anat. de differentes espcc. d'Insectes, in the Mem. du Mus. 

 d'hist. Nat. XViri. 1829, p. 282, 377. 



Brandt. Medizin. Zool. II. 1833, p. 87. Recherch. sur l'anat. d. Araig- 

 nees, in the Ann. d. Sc. Nat. XIII. 1840, p. 180. 



Savigny. Descript. de rEjjypte. llist. Nat. Arachnides, PI. I.-IX. 



Audouin, Lettre contcnant des recherches sur quelques Araigneea 



