ON EUROPEAN SPIDERS. 153 
liarity, which moreover, as Ducis !) shortly after showed, had not even 
been correctly understood, since the posterior stigmata do not, like the 
anterior, lead to tracheal sacs, but to a pair of tracheal tubes. The 
Dysderoidæ are now generally admitted to stand in nearer relationship to 
SUNDEVALL'S Drassides than to his Mygalides. WALCKENAER ?) was, I be- 
lieve, the first who considered them as a separate group comparable with 
our families; they were by him called " Tubicoles”: the name Dysderides 
they received from C. KocH (loc. cit). This family is also adopted by 
BLACKWALL. WESTRING includes it in his Drasside, and SIMON in his ” Drassi- 
formes" (as a separate "tribus", ” Ségestriens ou Pulmo-trachéens”), i. e. in 
our Zubitelarie. 
The genus Nops, which SIMON refers to his " Drassiens” (ad max. 
part. = Drassoidæ NOB.) belongs probably to the Dysderoide: Conf. Mac 
LEAY, On some new forms of Arachn., p. 2 et seq. In that paper (p. 4) 
we read of another spider, which Mac LEAY also refers to the Dysderoide: 
"I possess specimens of a translucid West Indian spider closely allied to 
Filistata, and having Mygalidous eyes situated on the balloon-shaped cepha- 
lothorax of a Nops. In these specimens the antennæ [mandibles], maxillæ 
etc. are so rudimentary and inconspicuous, as would almost make us doubt 
that the species can be an animal of prey, did we not find it make an 
irregular web in the corners and crevices of houses. I call it Æemerachne ?) 
tenuipes”. — This spider would seem to belong rather to the Scytodotde 
than to the Dysderoide or Filistatoide. 
The following genera belong to the European Fauna: 
$ Oculi 6 perfecte explicati. 
+ Series oculorum antica ex 4, postica ex 2 oculis constans; oculi non omnes 
valde appropinquantes. 
1. Maxille longæ, reetze, sub-parallelæ. Ungues tarsorum trini. 1. Segestria. 
2. Maxillæ breves, late, basi gibbosæ, in labium paullo inclinatæ. 2. Schænobates. 
** Series oculorum antica ex 2, postica ex 4 oculis constans. 
A. Oeuli laterales seriei postieze, sub-rectæ, longius ab oculis mediis ejusdem 
seriei disjuncti; oculi duo antici inter se longe remoti. Ungues tarsorum 
TIT N NUN or Mer EMEN ce n do nS Seve iss T Ariane 
B. Oculi saltem seriei posticæ inter se valde appropinquantes. 
1) Sur les organes de la Respir. dans les Aran. Segestria et Dysdera, p. xir, 
xiv. (1835). 
2) Mém. sur une nouv. Classif. d. Aran., p. 438. 
3) This name (which is from juegos, tame, and dedyvn, spider) ought of course 
to be written Hemerarachne. 
Nova Acta Reg. Soc. Sc. Ups. Ser. III. 20 
