216 T. THORELL, 
1848. Attus ID., Die Arachn., XIV, (ad part.:) p. 44—49. 
1850. »  ID., Uebers. d. Arachn.-Syst., 5, p. 68 (excl. sub-gen. Ballo). 
1861. » . WEsTR., Aran. Suec., p. 543 (ad partem). 
1861. Salticus Buackw., Spid. of Gr. Brit., I, p. 47 (ad partem). 
1864. Attus [Atta]: "groupe" zd. Sim., H. N. d. Araignées, p. 310. 
1868. »  ID., Monogr. d. espèces europ. de la fam. d. Attides, p. 6 (16), 14 (24) 
(ad partem). 
Type: Euophrys frontalis (W ALCK.). 
When C. KocH in 1833, in HERR.-SCHAFF., Deutschl. Ins., N:o 119, 
for the first time mentioned an Attus, it was A. terebratus (CLERCK) that 
he described under that name. In the same work he, in 1834, described, 
under the new generic name Æuophrys, two species, which he called £. 
festiva and E. frontalis. Somewhat later (1837), in Uebers. d. Arachn.- 
Syst., 1, he endeavoured to give the characteristics which distinguish Attus 
and Æuophrys: he there registered, as belonging to Attus, A. arcuatus 
(CLERCK), as also A. terebratus (ID.), the position of the eyes and the male's 
palpi of which he figured, and which species therefore ought to be con- 
sidered as the type of the genus. To Æuophrys he refers several species, 
which are very nearly related to A. terebratus and arcuatus, but moreover 
also e. g. E. petrensis, which is more nearly related to Æ. frontalis. This 
latter species is now not mentioned, neither is JE. festiva. Several years 
later, in Die Arachniden XIII and XIV (1846, 1848), we find that KocH 
has completely altered his view of the genera Attus and Huophrys: A. tere- 
bratus and A. arcuatus are now referred to Æuophrys, whereas E. frontalis 
and E. petrensis are aggregated to Attus. So also lastly in Uebers. d. 
Arachn.-Syst., 5 (1850). From what has now been said it is evident, that 
KocH at different times has defined the genera Attus and Kuophrys in to- 
tally different and irreconcileable ways. As he in 1837, when WALCKE- 
NAER'S great genus Attus was broken up by him, defined the genus, for 
which he preserved WALCKENAER'S name, so, that A. terebratus was to be 
the type for Attus (WALCK.) KocH, it is clear, that the name Zuophrys, if 
not to be absolutely cashiered, must be applied to some one or more of the 
species described under that name, which can not be referred to the same 
genus as A. terebratus, and preferentially to that species among them, which 
was first described under the name Æuophrys: accordingly to E. frontalis. 
(The contemporaneously described Æ, festiva = E. striata Kocu [non CLERCK] 
is an Attus (WALCK.) NOB.). — Æuophrys (KOCH) NOB. must accordingly be 
= sub-gen. Attus KocH 1850. 
Like Attus, the species of Æuophrys have a high cephalothorax, but 
as the back of the cephalothorax is as broad as its base, and the hinder- 
