204 T. THORELL, 
sub-order. — All the European species may be referred to one and the 
same sub-family (Attinæ); among exotic forms perhaps Lyssomanes HENTZ !), 
ought to be considered as the type of a separate sub-family, characterized 
by the eyes being arranged in four transversal rows: the lateral eyes of 
the first row in the ordinary Attoide are in fact in Lyssomanes removed so 
high up that they form a separate row about half-way between the first and 
third pair of eyes. The relative size of the eyes is however exactly the 
same in Lyssomanes as in the Attinæ, i. e. the first pair is considerably 
larger and the third pair considerably less than the other eyes. (In the 
Dinopoide, in which the position of the eyes is the same as in the Attinæ, 
the relative size of the eyes is altogether different: it is in fact the last 
pair but one, or the eyes of the 2" row, which in that family are consi- 
derably larger than the rest). — Calamistrum and infra-mammillary organ 
are absent. 
There is no family in the whole order of spiders, which, on account 
of the great similarity between the species, is so diffieult to resolve into 
good genera, as this, while at the same time its extraordinary richness in 
species renders such a resolution in the highest degree desirable. In the 
works of the older writers, from LATREILLE and WALCKENAER inclusively, 
the whole family constitutes but one genus, Salticus LATR. or Attus WALCK., 
whieh by many arachnologists, among whom is BLACKWALL, is still pre- 
served undivided. But already in 1832 Hentz ?) detached from Attws WALCK. 
the genus Synemosyna, which partly answers to Leptorchestes NOB. or Sal- 
ticus C. KocH (non SUND.), as also Æpiblemum (ad part. = Calliethera 
C. Koch). SUNDEVALL ?), who is followed by WESTRING, the following year 
divided Attus WALCK. into two genera, Salticus and Attus, which easily 
admit of distinction. This on the contrary is not the case with most of 
the Attoid-genera proposed by C. Koch (in Uebers. d. Arachn.-Syst., Die 
Arachniden, etc.) between 1835 and 1850, and which have been pretty 
generally received, in spite of the imperfect manner in which they have 
been characterized. WHITE in 1841 5) formed the genus Homalattus and in 
1846 °) Dineresus [Deineresus], both exotic. OHLERT *) has endeavoured to 
define more accurately those of Kocn’s genera, which belong to the Prus- 
1) Aran. of the United States, in Boston Journ. of Nat. Hist., V, p. 197. 
2) On North American Spiders, p. 108. 
3) Svenska Spindl. Beskr., in Vet. Akad. Handl. f. 1832, p. 199, 201. 
4) Descr. of new or little known Arachn., p. 446. 
5) Deser. of a new genus of Arachn. etc., p. 179. 
6) Aran. d. Prov. Preuss., p. 148—150. 
