200 ARACHNIDES. 



cradle of their posterity, and in which the young ones, for a 

 time, live in common with the mother. 



Certain species, resembling Ants, elevate their anterior legs 

 and make them vibrate with great rapidity. 



Singular combats sometimes ensue between the males, but 

 no fatal issue occurs. 

 A subgenus established by M. Rafinesque, that of 



Tessarops, 



Appears to us to approximate closely to the following one in most 

 of its characters and habits, but to be widely removed from it, if 

 there be no mistake, in the number of the eyes which is but four. 

 See Ann. Gener. des Sc. Phys., VIII, p. 88. 



A second subgenus, which also is only known to us by description, 

 is the 



Palpimanus, Duf., 



Described by M. Dufour in the Ann. des Sc. Phys., V, Ixix, 5, 

 and which appears to him to be intermediate between Eresus and 

 Salticus. The disposition of the eyes is about the same as in the 

 first of these two subgenera. The ligula is similarly triangular and 

 pointed, and the jaws are still dilated and rounded at the end; but 

 according to M. Dufour, they are inclined and not straight like 

 those of the Eresi. The terminal joint of the anterior tarsi is in- 

 serted laterally and has no hooks. 



He describes one species, the Palpimane bossu. It never 

 jumps, walks slowly, and is found under stones in Valencia, 

 where, however, it is extremely rare. 



A new species has been discovered by M. Lefevre in Sicily, 

 which appears to me to belong to this genus. 

 In the two following subgenera there are always eight eyes; the 

 jaws are straight. 



Eresus, Walck. 



Four eyes forming a small trapezium near the middle of the ante- 

 rior extremity of the thorax, the other four on its sides forming a 

 similar but much larger figure. The ligula is triangular and point- 

 ed. The tarsi are terminated by three hooks(l). 



(1) Eresus cinnaberinus, Walck.; Jlranea quatuor -guttata, Ross., Faun. Etrusc, 

 II, 1, 8, 9; Coqueb., lllust. Icon. Insect., dec. HI, xxvii, 12; Aranca nigra, Petag\, 

 Specim. Insect. Calab. M. Dufour, Ann. des Sc. Phys., has described two Spanish 

 species; one of them the Eresus acanthophilus VI, xcv, 3, 4 is my Erese raye of 



