©) 
On EUROPEAN SPIDERS. 123 
those species of Drassus WALCK., which WALCKENAER referred to the ” 5° 
fam., les Phytophiles” of that genus?) It is however still by SIMON, On- 
LERT and MENGE referred to the Zheridioide, from which the appearance 
of its claws is sufficient to distinguish it; the inferior tarsal claw is in fact 
armed with several (4— 6) long, curved teeth, which is never the case in 
the sub-orders Orbitelariæ and Retitelarie. 
As regards the name Operaria see below (p. 128) under the head of 
Gen. 5. Cœlotes. 
Gen. 2. ARGENNA m. 
Deriv.: "4oyevvóc, mythol. proper name. 
The spider for which we have formed this genus, and which we 
have called A. Mengei *), seems to occupy an intermediate position between 
Dictyna, Amaurobius and Hahnia, and on a hasty inspection reminds an 
observer strongly of the last mentioned genus. I have but two dried spe- 
cimens of it, a c? and a 9 (the first much injured), which I found many 
years ago here in the vicinity of Upsala. It is distinguished by the eyes of 
the anterior row being situated very close together, not more distant than are 
the lateral eyes from each other. In the form of the maxillæ and lip, as well 
as in the unarmed legs, this spider is nearly related to Dictyna, but the 
form of the cephalothorax and the mandibles is much the same as in 
Amaurobius. 
The breadth of the large, arched, thin-haired pars cephalica is nearly 
= 2 of the maximum breadth of the cephalothorax (in 9; it is somewhat 
less in 5). The eyes are of nearly equal magnitude, the anterior central 
eyes a trifle smaller than the others. The anterior row of eyes is straight, 
the posterior, when seen from before, curved downwards, when seen from 
above, slightly curved forwards. The distance of the anterior series from 
the border of the clypeus is a little greater than an eye’s diameter. The 4 
central eyes describe a trapezoid broader behind; the distance between the 
1) Hist. Nat. d. Ins. Apt., I, p. 630. 
2) Argenna Mengei. — Rufescenti-fusca, pedibus extus plus minus distincte fusco- 
annulatis, abdomine fusco vel nigro, sericeo-pubescenti, in dorso maculis parvis te- 
staceis picto: primum 4, fere in quadratum dispositis, quarum duæ posteriores, ma- 
jores, versus medium dorsi site sunt, tum pone eas pluribus, minutis, in tres series, 
versus anum convergentes, dispositis. 
Longit. c:a 2—2+ millim. (c? 3). 
Ad Upsaliam rarissime inventa. 
