906 ARACHNIDES. 



CTENUS, Walck. 



The eye arranged in three transverse lines, which become gra- 

 dually longer 2, 4, 2 and form a sort of curvilinear, reversed tri- 

 angle, with a truncated apex. The ligula is square, and almost iso- 

 metrical ; the fourth pair of legs, and then the first, are the longest ; 

 the third is the shortest. 



This genus was established on a large species found at Cayenne. 

 Others have since been discovered in the same island and in Brazil, 

 but none of them have been described. 



DOLOMEDES, Lai. 



The eyes, arranged in three transverse lines, 4, 2, 2, form a quad- 

 rilateral, somewhat wider than long; the two posterior ones are 

 placed on an elevation. The second pair of legs is as long as or 

 longer than the first ; those of the fourth are still longer. The ligula 

 is square and as broad as it is high, like that of a Ctenus. 



In some, the two lateral eyes of the anterior line are larger than 

 the two intermediate ones ; their abdomen is an oblong oval termi- 

 nating in a point. 



The females construct an infundibuliform, silky nest on the tops of 

 trees covered with leaves, or on bushes ; there they lay their eggs, and 

 when they go abroad to hunt or are forced to abandon their retreat, 

 they always bear off" their cocoon which is attached to the base of the 

 abdomen. Clerck says he has seen them spring upon flies which 

 were buzzing around them *. 



They inhabit the borders of streams, run over their surface with 

 the most surprising rapidity, and can even partly enter the water 

 without becoming wet. The females weave a coarse irregular web, 

 between the branches of plants, in which they place their cocoon. 

 They watch it till the ova are hatched f. 



LYCOSA, Lat. 



The eyes of the Lycosse also form a quadrilateral, but one as long 

 or longer than it is wide ; the two posterior eyes are not placed on an 

 elevation. The first pair of legs is evidently longer than the second, 

 but shorter than the fourth, which, in this respect, surpasses all the 

 others. The internal extremity of the jaws is obliquely truncated. 

 The ligula is square, but longer than it is broad. 



Almost all the Lycosae keep on the ground, where they run with 

 great swiftness. They inhabit holes accidentally presented to them, 



Oxyopes lineatus, Lat., Gener., Crust, et Insect., I, v, 5, female. See article Oxyope, 

 in the entomological part of the Encyclop. Method., the Tab. des Aran., Walck., 

 and the Faune Franchise. 



* Aruneus mirabilis, Clerck, Aran. Suec., pi. v, tab. 10; Aran. rufo-fasciata, De 

 Geer ; Ar. obscura, Fab. See the Faune Fran9aise Dolomedes sylvains and the 

 Ann. des Sc. Phys. Doloniede spinimane, Dufour, V. Ixxvi, 3. 



f* Dolomedes marginatus, Walck. ; Araneus undatus, Clerck, V, tab. 1 ; De Geer. 

 Insect. VII, xvi, fig. 13, 15; Panz., Faun., LXXI, 22 ; Dolomedes fimbriatus, 

 Walck ; De Geer, Insect. VII, xvi, 9 11 ; Araneus fimbriatus, Clerck, V, tab. ix. 

 These species compose the division of the shore Dolomedes of Walckenaer. 



