590 CLASS IX. 



Anthrobia TELLK. Ocelli none. 



Lives in caverns. Ought it to be counted of this family ? 



Phalanx II. Aranece dipneumones. Spinarets six. (Pulmonary 

 sacs only two ; stigmata mostly two, sometimes four, the two 

 posterior leading to tracheae, not to lungs. Ocelli mostly eight, 

 sometimes fewer. Claw of mandible capable of inflection trans- 

 versely or laterally to the inner margin of mandible). 



Most of the spiders of this division have only two stigmata. In 

 some, however, four are observed, and on that account the genera 

 Dysdera and Filistata were placed by LATREILLE with Mygale 

 (amongst the Tetrapneumones). But two of these stigmata do not 

 lead to pulmonary sacs, but to air-tubes, and were also observed in 

 Argynoreta by GRUBE. For the arrangement, therefore, this cha- 

 racter of the number of stigmata is without weight, because it does 

 not indicate natural affinity. The number of lung-sacs, on the other 

 hand, appears to be in harmony with the characters derived from the 

 mandibles and from the number of spinarets. 



A. Tubitelce. Spinarets cylindrical, parallel, collected into 

 a fasciculus, directed backwards. Ocelli six or eight disposed 

 in two rows (in one genus only two). Fourth or first pair of legs 

 very long ; intermediate legs shorter. 



Legs when at rest retracted upwards, with femora not pressed 

 against the ground. Spiders weaving webs, resembling tubes or fish- 

 ing-nets, and hidden in chinks, corners, or under stones. 



Nops MAC LEAY. (The eyes excepted almost similar to Dys- 

 dera LATE.) 



Sp. Nops Guanabacoce MAC LEAY, Ann. of nat. Hist. n. 1838, PI. i, fig. i, 

 Cuba. The only species of spider hitherto known with only two eyes. 



1 1 Ocelli six. 



Dysdera LATR. Ocelli almost contiguous, arranged in two rows ; 

 the first row of two, the second of four ocelli. The first pair of 

 feet surpassing in length all the rest, the fourth pair the inter- 

 mediate. 



Sp. Dysdera erythrina WALCK., Aranea rufipes FABK., LATR. Gener. Crust, 

 et Ins. Tab. v. fig. 3, HAHN AracJin. Tab. I. fig. 3 ; in south of Germany, &c. 



