Mr. BuackwaLvs Descriptions of new Species of Spiders. 609 
In treating upon the Phytophile in the Faune Francaise, Aranéides, p. 181, 
M. Walckenaer remarks, * on ne peut se dissimuler, que ce petit groupe, dont 
les caractéres ne sont pas assez tranchés pour former un genre, est d'une. 
classification difficile et douteuse, et que, Drasse par ses organes les plus 
essentiels, il s’allie sons d'autres rapports aux Clubiones et aux Théridions.” 
The difficulty and uncertainty alluded to in the foregoing quotation no 
longer exist as regards those species known to be furnished with eight spin- 
ners and with calamistra, and the establishment of the genus Ergatis is pro- 
posed for their reception. 
Family Lycosipz. 
Genus Lycosa, Latr. 
3. Lycosa rapax. Cephalo-thorace magno, saturatè brunneo, fascià medianâ 
lata lateralique obscuriore flavescenti-brunneis; mandibulis maxillis labio 
sternoque saturate rufo-brunneis; pedibus robustis, rufescenti-brunneis, 
ad femora colore saturatiore maculatis ; pari 4to longissimo, dein 1mo, 
3tio brevissimo; abdomine fascia latà median flavescenti-brunneà nigro- 
marginatá, margine posticè interrupto et cum maculis parvis lateralibus 
vittas obliquas efformante. 
Length of the female 3ths of an inch; length of cephalo-thorax 1; breadth à; 
breadth of abdomen +; length of a posterior leg +; length ofa leg of the 
third pair g. ! ' Lu 
Cephalo-thorax large, hairy, compressed anteriorly; sides depressed, with 
slight furrows diverging from the upper part toward the margins, a 
narrow indentation occurring in the medial line of the posterior region ; 
colour dark brown, with a broad, yellowish brown band extending along 
the middle, and an obscure one of the same hue above each lateral mar- 
gin. Four eyes, much smaller than the rest, form a transverse row in 
front; the other four, situated on the sides and anterior part of the 
cephalo-thorax, describe a quadrilateral, the anterior ones of which are 
the largest of the eight. Mandibles powerful, conical, vertical, armed 
with a few teeth on the inner surface; they are of a dark brown colour, 
with a faint tinge of red near the base, in front. Maxille straight, en- 
larged and rounded at the extremity, of a reddish brown hue. Lip nearly 
