294 
ARACHNIDES. 
and resembling a tent, like that of the Clotho, beneath which 
was the cocoon. It is, I presume, the work of this species of 
Drassus, and proves the analogy of this subgenus with the pre- 
ceding one. M. Leon Dufour, Ann. des Sc. Phys., VI, xcv, 
I, has given a very complete discription of a species of Drassus 
— D. segestriformis — found by him under stones in the highest 
Pyrennees, and never beneath the Alpine region. It is one of 
the largest of this subgenus, and appears to me to be closely 
allied to my melanogaster, which I believe to be the D. lucifiigus 
Walckenaer, Scheeff. I con. Cl, 7- 
One of the prettiest species, which is very commonly observed 
running along the ground in the vicinity of Paris, is the D. 
relucens. It is small, and almost cylindrical, with a fulvous 
thorax, invested Avith a purple silky dorvn ; the abdomen is a 
mixture of blue, red, and green, with metallic reflections, and 
marked by two transA^erse and golden lines, of Avhich the ante- 
rior is arcuated. Four golden dots are sometimes observed on it*. 
In the other Tubitelae the jaAvs do not surround the ligula ; their 
external side is dilated interiorly beneath the origin of the palj)i. 
Some have but six eyes, four of Avhich are anterior, and form a 
transA’’erse line, and the tAVo others posterior, situated, one on each 
side, behind the tAvo lateral ones of the preceding line. Such is the 
essential character of the 
Segestria, Lat. 
The ligula is elongated and almost square. The first pair of legs, 
and then the second, is the longest ; the third is the shortest. These 
spiders construct long, silky, cylindrical tubes in the chinks and 
crevices of old Avails, Avhich they inhabit; their first pairs of legs are 
always directed forAvards, and diverging threads border the external 
entrance of their domicil, forming a net for ensnaring Insects. The 
genital organ of the S. perfida — Aranea jlorentina, Ross., Faun. 
Etrusc., XIX, 3 — a large black species Avith green chelicerse, Avhich 
is not rare in France, is shaped like a tear, or is ovoido-conical, very 
acute at the end, entirely salient, and red f . 
The remaining Tubitelae haA'^e eight eyes. On account of the dif- 
ference in the site of their habitations, Ave may divide them into the 
terrestrial and the aquatic. Althoiigh the last family of the Araneides 
of Walckenaer (his Naiades) is composed of these latter, they are so 
closely allied to the other Tubitelae, that notAvithstanding this disparity 
of habits they must be placed together. In those Avhich are terres- 
trial, the ligula is almost square, or but very slightly narroAved, Avith 
a very obtuse or truncated summit ; the jaAvs are straight, or nearly 
so, and more or less dilated toAvards the extremity ; the tAVO eyes of 
each lateral extremity of the ocular group are generally separated 
from each other, or at least are geminate and placed on a particular 
eminence like those of the aquatic I’ubitelse. • 
* For the other species see Faun. Paris., Walck., and Tahl. des Aran., Id. 
t Add the Seg. senoculata, Walck., Hist, des Aran., V, vii ; Aranea senoculata , 
L. ; Deg. 
