306 
ARACHN1DE3. 
Ctenus, Walck. 
The eyes 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, Lat. 
The eyes, arranged in three transverse lines, 4, 2, 2, form a quad- 
rilateral, somewhat wider than long ; the tivo 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 ])oint. 
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 Lycos?e 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 Lycosse keep on the ground, where they run with 
great swiftness. They inhabit holes accidentally presented to them. 
Oxyopes Uneatus, 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 Fran 9 aise. 
* Araneiis mirahilis, Clercl:, Aran. Suec., pi. v, tab. 10; Aran, rvfo-fasciata, De 
Geer ; Ar. ohscura, Fab. See the Faune Fran^aise — Dolomedes sylvains — and the 
Ann. des Sc. Phys. — Doloniede spinimane, Dufour, V. Ixxvi, 3. 
-f- Dolomedes marginatus, Walck. ; Araneus undatits, Clerck, V, tab. 1 ; De Geer. 
Insect. VII, xvi, fig. 13, 15; Panz., Faun., LXXI, 22; — Dolomedes fimbriaius, 
Walck ; De Geer, Insect. VII, xvi, 9 — 11 ; Araneus fimbriaius, Clerck, V, tab. ix. 
These species compose the division of the shore Dolomedes of Walckenaer. 
