On EUROPEAN SPIDERS. 203 
and can only be clearly seen with a good microscope. The superior ones 
are similar in form to those of the following legs, except that they are less 
curved and have only about 3 conical teeth; the inferior claw has the form of a 
very small hook, sharply bent downwards, with a long fine extremity, and 
seems to be armed on the underside with one long fine tooth. Thus the 
number of claws on the first pair is the same as in Hresus, and on the 
other legs as in the Attoide. 
Fam. IL ATTOIDE. 
Syn.: 1850. Attides C. Kocu, Uebers. d. Arachn.-Syst., 5, p. 42. 
This family, perhaps the most sharply defined and most natural 
within the whole order of Aranew, is without difficulty distinguished from 
the Æresoidæ by the peculiar position and relative size of the eyes. The 
claws are in all cases only two on each tarsus 5; they are long and slender, 
a little sinuated (i. e. with a slight .^-formed curvature), and spring at a 
right or slightly acute angle from the upper end of the narrow and high 
part formed by their base. The tooth-armature is very various, and ordi- 
narily different on the inner and outer claw, the number of teeth on the 
former being usually far greater than on the latter. The teeth, when there 
are any, occupy only the outer half of the claw’s length; near the base 
there are no teeth, except now and then on the first pair of legs, the claws 
of which are often shorter and more uniformly éurved than those of the 
other legs. The 4" pair of legs has usually the claws longest and most 
copiously provided with teeth. The claw-tuft is formed of hairs that are 
either flattened and gradually more or less dilated towards the end, or di- 
lated and flattened at the extremity only; in this respect the tufts on the 
different pairs of legs are often very different; they are sometimes, on the 
1* pair, continued as a scopula on the underside of the tarsus. In all the 
species that have been examined, the female’s palpi are destitute of a ter- 
minal claw, a circumstance, which in other families, with the exception of 
the Scytodoide, only occurs exceptionally. I believe it is only the species 
of this family, that justify the name "jumping-spiders", given to the whole 
1) Attus phrynoides WALCK. (Ins. Apt., I, p. 479) is said to have on its extra- 
ordinarily long 1* pair of legs (pedes raptorii) only one toothless claw. This species 
ought undoubtedly to form a separate genus, to which also Attus obisioides DOLESCH. 
(Bijdr. t. d. Kenn. d. Arachn. v. d. Ind. Arch., p. 433) ought to be referred. This 
new genus, characterized by the long trochanteres of the fore-legs, may be called 
Diolenius (dıwi&veos, with outstretched arms). 
