PEDIPALPI. 



811 



Stygophrynus I Burmese species ; Charnius 3 species from South Sea 

 Islands and the Seychelles ; Sarax 2 species from E. Indies and Borneo ; 

 Catagius 1 Burmese species. 



Order 3. ARANEIDA (ARANEAE) * 



The cephalothorax (prosoma] covered by a single tergal shield, 

 but a groove or line indicates the limits of the head ; eyes usually 

 eight or six ; abdomen (mesosoma and metasoma) pedicellate, soft, 

 with very rarely any trace of segmentation ; two to four pairs of 



spinnerets ; sternum of 

 two pieces ; chelicerae 

 two- jointed, non-che- 

 late, with a poison 

 gland ; pedi pal p& 

 modified in the male 

 in connexion with fer- 

 tilization. 



The true spiders 

 form a very large and 

 widely dist r i b u t e d 

 assemblage of 



FIG. 527. Poison gland 

 and terminal joint of 

 chelicera of Avicularia 

 (Mygale). K Claw; 

 Gd poison - gland ; 

 B poison vesicle. 



FIG. 526. Dysdera 

 cainbridgii from the 

 ventral side. Kf 

 Chelicera ; Kt pedi- 

 palpus ; K basal joint 

 (jaw) of pedipalpus ; 

 P lungs ; St stigma of 

 lungs ; St' posterior 

 stigma leading into 

 the tracheae ; G geni- 

 tal opening ; Sp Spin- 

 nerets. 



Fio. 528. Front view 

 of the head of a Spi- 

 der, Textrix denticv- 

 lata, magnified (from 

 Warburton). 1 Head ; 

 2 eyes ; 3 basal joint 

 of chelicerae ; 4 claw 

 of chelicerae. 



FIG. 529. Anterior part of 

 the cephalothorax of 

 Avicularia (Mygale) with 

 the eyes (0) . 



* C. L. Koch, Die Arachneiden,Nurnberg, 1839-48. Blackwall, Spiders- 

 of Great Britain and Ireland, Ray Society, 1861. Menge, Preussische 

 Spinnen, beginning 1866. Thorell, Genera of European Spiders, 1869.. 

 Id. Synonyms of European Spiders, 1870-73. Simon, Arachnides de France 

 (still incomplete) beginning 1874. Pickard-Cambridge, Spiders of Dorset, 

 1879-81. McCook, American Spiders and their Spinning-work, Paris, vol. 

 i, 1889 (Philadelphia). Simon, Histoire Naturelle des Araignees, 2nd ed, 

 vol. i, 1892, Paris. Peckham, Sexual Selection in Spiders, Nat. Hist. Soc. 

 Wisconsin, 1889. 



