ARACHNOIDEA. 591 



Segestria LATR. Ocelli arranged in two rows ; the anterior row 

 of four, the posterior of two remote. Feet as in the preceding 

 genus. 



Sp. Segestria senoculata WALCKEN., Aranea senoculata L., DE GEER Mem. 

 vii. PI. 15, fig. 5, WALCKEN. Araneid. Tab. i. PI. 7, &c. 



Scytodes LATR. Ocelli six, equal, disposed in pairs, forming a 

 triangle with the vertex forwards. 



Sp. Scytodes thoracica LATR. Gener. Crust, et Ins. Tab. v. fig. 4, WALCKEN. 

 Araneid. I. PI. 10. 



Add genera Ariadne SAV. and Uptiotes WALCK. 



ttt Ocelli eight. 

 Clotho WALCKEN. 

 Drassus WALCKEN. 

 Asegena SUNDEV. 



Clubiona LATR. Ocelli arranged in two lines transverse, 

 j approximate. Maxillae straight, subdilated outwards at the base, 

 | rounded at the apex. Labium elongato-subquadrate, truncated or 

 emarginate at the apex. 



Sp. Clubiona holosericea LATR., Aranea holosericea L., DE GEER Mem. vn. 

 PI. 15, figs. 13 16, WALCK. Araneid. IV. PI. 3; mouse-grey, satiny- 

 shining, with an elongate pointed abdomen. The female lays her eggs 

 between one or two leaves spun together. 



Anyphcena SUNDEV. 

 Ciniflo BLACKW. 



Argyroneta LATR. Ocelli eight, four middle forming a square 

 (. ::'.). Maxillae straight, rounded at the apex. Labium elon- 

 :gato-trigonal. 



Sp. Argyroneta aquatica LATR., Aranea aquatica L., CLERCK Aran. PL 6, 

 Tab.- 8, DE GEER Mem. vn. PL 19, figs. 5 13, HAHN AracJin. Tab. 49, 

 fig. 118, HERRICH-SCH.EFFER D. Ins. Heft 134, Tab. 21, 22; 6"'long; one 

 I. of our largest native species; thorax red-brown, abdomen blackish, the 



first pair of legs longer the rest. This spider lives in fresh water ; as it 

 swims the abdomen and the thorax have a silvery aspect from the attached 

 stratum of air. This species spins a bell-shaped, water-proof web that is 

 filled with air, and open below ; this it attaches to water-plants by threads. 

 See the observations of DE GEER loc. cit. p. 303 313, those of DE LIGNAC, 

 &c. (of which WALCKENAER gives an ample extract in his Hist. not. des 



