590 CLASS IX. 
Anthrobia TeELLK. Ocelli none. 
Lives in caverns. Ought it to be counted of this family ? 
Phalanx II. Aranee dipnewmones. Spinarets six. (Pulmonary 
sacs only two; stigmata mostly two, sometimes four, the two 
posterior leading to trachez, not to lungs. Ocelli mostly eight, 
sometimes fewer. Claw of mandible capable of inflection trans- 
versely or laterally to the immer 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 Larrettte with MMygale 
(amongst the Tetrapnewmones). But two of these stigmata do not 
lead to pulmonary sacs, but to air-tubes, and were also observed in 
Argynoreta by Gruss. 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. Tubitele. 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 LATR.) 
Sp. Mops Guanabacoe Mao Luray, Ann. of nat. Hist. 11. 1838, Pl. 1, fig. 1, 
Cuba. The only species of spider hitherto known with only two eyes. 
tt Ocelli six. 
Dysdera LATR. Ocelli almost contiguous, arranged in two rows ; 
the first row ofstwo, 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 WaucK., Aranca rufipes FaBr., LatR. Gener. Crust. 
et Ins. Tab. v. fig. 3, HAHN Arachn. Tab. I. fig. 3; in south of Germany, &c. 
