122 T. THORELL, 
in the family Agalenoide?). That in the form and armature of the claws they 
agree with the typical Agalenoide, has already been pointed out by OHLERT ?). 
Even in the cases, when the inferior tarsal claw has but two teeth (there are 
usually more), these teeth are distinguished by their form: they are long, 
curved, generally very pointed, and the palpal claw of the female is at the 
same time armed with several powerful teeth. The spinning-tubes are very 
small and short, sometimes, as in Dictyna, difficult to perceive. — The 
European species known to me may be divided into five genera: Dictyna, 
Argenna, Titaneca, Lethia and Amaurobius. 
Gen. 1. DICTYNA Sunp. 1833. 
Deriv.: Aéxrvva, mythol. proper name (of Diana). 
. Syn.: 1805. Theridium WaLck., Tabl. d. Aran., p. 72 (ad part.: "7° Fam. Les Minimes, 
Minima"). 
1805. Drassus ID., ibid., p. 45 (ad part.: 3° Fam. Les phytophiles apparentes, Phy- 
tophile conspicue" ). 
1833. Dictyna Sunp., Consp. Arachn., p. 16. 
1833. Clubiona Buackw., Charact. of some undeser. gen. and spec. of Aran., p. 437 
(ad partem). 
1834, Drassus ID., Res. in Zool, p. 337 (ad part.; sec. Buackw., Spid. of Gr. Brit.). 
[1840. Operaria..., in Proceed. of the Linn. Soc., I, p. 66.] 
1841. Ergatis Buackw., The differ. in the numb. of eyes etc., p. 608. 
1847. Argus Warck., H. N. d. Ins. Apt., IV, p. 500: ("Fam. des Ergatides, Ær- 
gatides", ad max. part.). 
1861. Dietyna WESTR., Aran. Suec., p. 382. 
1861. Ergatis Brackw., Spid. of Gr. Brit., I, p. 146. 
1864. Dictyna Srw., H. N. d. Araignées, p. 186. 
1869. 5 Menge, Preuss. Spinn., III, p. 244. 
Type: Dictyna arundinacea (LINN.). 
It is BLACKWALL that we have to thank for having assigned to this 
genus, which had usually before been reckoned among the Retitelarie, its 
proper place in the vicinity of Amaurobius, and for having united with it 
stigmata in the infra-mammillary organ, which Menge here (loc. cit. p. 248) even 
calls the tracheal area ("Luftróhrenfeld"). Conf. our note p. 30. But in other 
species of Dictyna, D. arundinacea or benigna for inst., the tracheæ do not open in 
the infra-mammillary organ, but just behind the rima genitalis, according to MENGE. —. 
The ordinary air-sacs are said (1. c., p. 248) to be rudimentary in D. albo-maculata. 
1) AuSSERER, Die Arachn. Tirols, 1, p. 150. 
2) Klauenbild. d. Preuss. Spinn., p. 9, 18. 
