366 



THE ARACHNOIDAE. 



^295. 



ORDER III 



Abdomen and cephalothorax unarticulated, distinct from each other. 

 Respiratory organs consisting of tracheae and lungs. 



SUB-ORDER VII. ARANEAE. 



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

 tria, Dysdera, Scytodes, Clubiona, Drassus, Argyroneta, Clotho, 

 Agelena, Lachesis, Tegenaria, Micryphantes, Theridion, Linyphia, 

 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 : Thelyphouus, Phrynus. 



SUB-ORDER IX. SCORPIONIDAE. 



Abdomen indistinctly separated from the cephalothorax. Cheliceres 

 forficulate. 



Genera : Scorpio, Buthus, Androctonus. 



*l\ 



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. Meraoire apterologique, 1804. 



/. F. Meckel. Beitrage zur vergleichenden Anatomic, I. Hft. 2, 1809, 

 p. 105. 



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

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

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



Serres. Memoires du 31 us. d'hist. Nat. V. 1819, p. 86. 



Leon Ditfoitr. Ann. gener. d. Sc. physiq. d. Bruxelles, IV.-VI. 



/. Midler. Beitrage zur Anatomic des Scorpions, in MeckeVs Arch. f. 

 Anat. 1828, p. 29. 



Lyonet. Anat. de differeutes espfic. d'Insectes, in the Mem. du Mus. 

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



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

 n6es, in the Ann. d. Sc. Nat. XIII. 1840, p. 180. 



Savigny. Descript. de TEgypte. Hist. Nat. Arachnides, Pi. I.-IX. 



Aiidouln. Lottre couteiuiut des recherches sui* quclques Araignees 



I 



