ON EUROPEAN SPIDERS. 181 
. 
1861. Philodromus Wesrr., Aran. Suec., p. 445 (ad partem). 
1861. så Brackw., Spid. of Gr. Brit., I, p. 91 (ad partem). 
1864. m [Philodroma] Srw., H. N. d. Araignées, p. 406. 
Type: Philodromus aureolus (CLERCK). 
WALCKENAER refers Thaumasia senilis PERTY ") to the genus Philo- 
dromus, without doubt erroneously: it is not certain that Thaumasia is even 
a Thomisoid: PERTY himself refers it, though doubtfully, to the Zubitelarie. 
Gen. 7. THANATUS C. Koch. 1837. 
Deriv.: Savards, death. 
Syn.: 1837. Thanatus C. Kocu, Uebers. d. Arachn.-Syst., 1, p. 28. 
1861. Philodromus WEsTR., Aran. Suec., p. 445 (ad partem). 
1861. & Brackw., Spid. of Gr. Brit., I, p. 91 (ad partem). 
1864. Thanatus [Thanata] Srw., H. N. d. Araignées, p. 401. 
Type: Thanatus formicinus (CLERCK). 
Sub-fam. I. THOMISINÆ. 
This sub-family includes the forms which are strictly speaking ty- 
pical of the whole family — the xer éfoyÿv "crab-spiders". Their two 
pairs of back legs are always weaker and much shorter than the fore legs; 
single feather- or spade-like hairs are sometimes found under the claws, but 
they do not form claw-tufts or claw-brushes as in the Philodrominæ. The 
tarsal claws are (at least in the females) broad at the base, short and strong, 
and curved almost from the base, with rather long, closely set comb- 
teeth. In Xysticus and Coriarachne they are particularly coarse and blunt, 
in Misumena and other genera slenderer and more pointed. à 
From the genus Thomisus WALCK., in the compass given to it in th 
"Faune Francaise", and which is still received by for example WESTRING 
and BLACKWALL, i. e. as identical with Misumena Larr., C. Koch already 
in 1835 detached his genus Xysticus, which is very natural, and has been 
adopted by many arachnologists. The remaining species of Thomisus WALCK., 
for which C. KocH preserved that latter generie name, are on the contrary 
too heterogeneous to be allowed to remain united under a common name. 
One is obliged either to preserve Misumena LATR. (Thomisus WALCK.) un- 
1) Delect. Anim. Art. Bras., p. 192, Tab. XXXVIII, fig. 5. 
