On EUROPEAN SPIDERS. 113 
4 ^N 
has discovered both these species in Spain, and has thus enriched the Eu- 
Wropean Fauna with this interesting genus, has had the kindness to send me 
a specimen of each of them, whereby I ues been enabled to observe, that 
this genus, as well as Tveta, has 8 eyes, and not only 6, as LUCAS and 
all others who mention it, have stated. The posterior central eyes, which 
were supposed to be missing, have however quite a different appearance 
from the rest. They are posited much nearer to the lateral eyes than to 
each Other, and of an oblong triangular form, with the longest side 
. turned ‘towards the lateral eyes; they diverge rapidly backwards with their 
points, whereas the obliquely cut off base-sides diverge forwards. They 
Sei show a more or less evident transverse depression passing from the 
longest side to the opposite almost right angle. They are very flat, and 
ar as glass, and very much resemble the similarly flat and clear, oval 
.. or almost triangular posterior central eyes “of certain Drassoidæ (e. g. of the 
À genera Drassus and Gnaphosa). 
7** The anus is surrounded by a double ring of bristles, exactly as in 
the case of Uroctea. In Œc. annulipes the bristles of the outer ring are 
curved almost in the form of an uw. I have not been able to discover any 
row of spinning-tubes on the underside of the superior spinners. The legs 
are finer and slenderer in proportion than those of Uroctea, especially in 
(Ec. domesticus; but in other respects the species of Œcobius are in the 
highest degree similar to Uroctea, and SIMON very justly remarks: "Un 
observateur peu exercé prendrait les écobes pour de trés-jeunes clothos, 
tant l'aspect de toutes ces araignées est semblable" ?. It having been now 
.- shown that the number of eyes is the same in both, the mutual agreement 
between these two genera is still more striking. 
| The superior tarsal claws are slender, uniformly and much curved: 
in QEc. annulipes I have found those of the 1° pair of legs armed with 
about 10 comb-teeth, not long, but increasing in length from the base. On 
the 4" pair the claws are still more slender than on the 1*, with about 8 
teeth. The inferior claw has 3 “teeth, the palpal claw about 12. All this 
applies to Œc. annulipes 2. 
BLACKWALL has, under the name of Œcobius navus, described a spi- 
der from Madeira, which has 6 eyes, infra-mammillary organ and calamistrum, 
2 claws on the tarsi, and three-jointed (?) spinners with spinning-tubes on 
the underside. None of these characteristics however belong to the genus 
Œcobius Luc., and it is clear that the species described by BLACKWALL 
1) Hist. Nat. d. Araignées, p. 158. 
Nova Acta Reg. Soc. Sc, Ups. Ser. II. 15 
