ARACHNIDES. 
292 
are not indentetl; very small hooks; the shortness of the body and 
length of the legs produce a resemblance to the Crab-Spiders or 
Thomisi. The relative length of these organs differs but little ; the 
fourth pair, and then the preceeding one are merely somewhat longer 
than the first ; the tarsi, only, are furnished with spines. The eyes 
are further from the anterior margin of the thoi’ax than in the fol- 
lowing subgenus, and are approximated and arrange^ as in the 
genus Mygale of Walckenaer ; three on each side form a reversed 
triangle ; the two others form a transverse line in the space comprised 
between the two triangles. The jaws and the ligula are proportiona- 
bly smaller than those of the same subgenus ; a short projection or 
slight dilatation on the external side of the jaws, gives insertion to 
the palpi ; the jaws terminate in a point ; the ligula is triangular and 
not nearly oval as in Drassus. The two superior or most lateral 
fusi are long, but what, according to Dufour, jjarticularly charac- 
terizes his Uroctese or our Clothos, is, that there are two pectiniform 
valves which open and shut at the will of the animal iir place of the 
two intermediate fusi. 
But a single species is known, the Uroctea 5-maculata, Du- 
four, Ann. des Sc. Phys., V, Ixxvi, 1 ; Clotho Durandii, Lat. 
The body is five lines in length, of a fine chesnut colour; abdo- 
irren black ; five small, round, yellowish spots above, four of 
which are arranged transversely in pairs, and the last or fifth 
posterior ; legs hairy. It is evident from the plates of the great 
Avork on Egypt, that M. Savigny found it in that country, and 
proposed forming a new genus rvith it. Count Dejean brought it 
from Dalmatia ; and Schreiber, director of the Imperial Museum 
of Vienna, has sent me specimens captured in the same conn 
try. M. Dufour also found it in the mountains of Narbonne, 
in the Pyrennees and among the rocks of Catalonia. To this 
latter naturalist we are indebted not only for our krrOAvledge of 
the external characters of this spider, but for many curious 
observations relative to its habits. “ She constructs,” says he, 
“ a shell resembling a calotte or patella an iirch in diameter, on 
the uirder surface of large stones or in the fissures of rocks. Its 
contour presents seven or eight emarginations, the angles of 
which are alone attached to the stone by silken fasciculi, the 
margin being free. This singular tent is admirably Avmven. 
The exterior resembles the very finest taffeta, formed, according 
to the age of the animal, of a greater or less number of layers. 
Thus, when the young Uroctea fii>t commences her establish- 
ment, she merely forms two wets, between which she seeks for 
shelter. Subsequently, and I believe at each change of tegument, 
* I have seen, in a well preserved specimen, six fusi, of which the two superior 
were much the longest and terminated by an elongated joint, forming an elliptical 
lamina, and the other four small, the inferior ones particularly, and arranged in a 
square. The anus, placed under a little membranous projection resembling a cly- 
peus, was furnished on each side with a pencil of retractile hairs. These pencils 
are the parts named by Dufour pectiniform valves, and are distinct from the two 
iirtermediate fusi, which are concealed by the two inferior ones. 
