PULMONARY. 197 



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, Lat. 



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(l). 



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

 the most surprizing 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(2). 



Lycosa, Lat. 



The eyes of the Lycosae 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 se- 

 cond, 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, or 

 which they excavate, lining their parietes with silk, and enlarging 

 them in proportion to their growth. Some establish their domicil 



(1) Araneus mirabilis, Clerck, Aran. Suec, pi. v, tab. 10; Aran, rufo-fasciata, 

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

 the Ann. des Sc. Phys. Dolomede spinimane, Dufour, V, Ixxvi, 3. 



(2) 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. 



