212 T. THORELL, 
a strong tooth on the underside of the pars femoralis of the palpus. In 
some species the cephalothorax is not double as long as it is broad, but 
it is easy to distinguish them from other, nearly related genera by the close- 
ness of the anterior central eyes and their inconsiderable distance from the 
deeply emarginated edge of the almost naked clypeus, together with the 
peculiar colour (black, abdomen more or less metallic, legs generally yellow 
or spotted with yellow). The eyes of the 3" row are usually, but not al- 
ways, more widely separated from each other than from the margin of the 
cephalothorax. The claws are of the usual form, nearly similar to those 
of Epiblemum, but the teeth are less numerous on the inner claw. In 
H. cupreus I have counted 6 fine teeth upon the inner and 2 coarse ones 
on the outer claw (4" pair)  OHLERT states the numbers to be 10 and 1. 
On the 1* and 3" pair, according to him, the external claw is without 
teeth. The hairs of the claw-tuft dilate gradually outwards. 
Gen. 5. BALLUS (C. Kocx). 1850. 
Deriv.: Baddw, throw. 
Syn.: 1834 Salticus Reuss, Zool. Misc., Arachn., (ad part.:) p. 273 (279). 
1837. Euophrys C. Kocu, Uebers. d. Arachn.-Syst., 1, p. 33 (ad partem). 
1846. Marpessa [Marpissa] ID., Die Arachn., XIII, (ad part.:) p. 53. 
1850. Attus: sub-gen. Ballus ID., Uebers. d. Arachn.-Syst., 5, p. 68. 
1861. - WzsTR., Aran. Suec., p. 543 (ad partem). 
1861. Salticus Buackw., Spid. of Gr. Brit., I, p. 47 (ad partem). 
1864. Attus [Atta]: sub-gen. zd.: "groupe" Ballus [Balla], et sub-gen. Dendryphantes 
Sm., H. N. d. Araignées, p. 310 (ad partem). 
1868. 5 ID., Monogr. d. espéces europ. de la fam. d. Attides, p. 6 (16), 14 (24) 
(ad partem). 
Type: Ballus heterophthalmus (REUSS). 
To this genus we refer not only the species proposed as its type, 
but also Attus depressus WALCK. (Salticus brevipes HAHN), which C. Kocx 
refers to JMarpessa, and Salticus obscurus BLACKW., which is probably 
nothing else than the male of Ballus depressus. 
The claws are, at least in B. depressus, small, slightly sinuated, of 
ordinary form: on the 4" pair I have counted about 15 teeth on the inner 
and about 5 on the outer claw; the outer claw of the 1* pair is destitute 
of teeth, the inner has about 10 teeth. The hairs of the claw-tuft are 
dilated at the extremity. 
