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Spiders captured in Canada. 43 
near their base; they are hollowed about the middle of the inner 
surface, leaving a strong prominence near their extremity, on the 
lower part of which a few small teeth are situated. The cubital 
and radial joints of the palpi are short ; the former is the stronger, 
and the latter has a small pointed process projecting from the 
upper part, in front, and an obtuse apophysis at its anterior ex- 
tremity, on the outer side; the digital joint is oval, convex and 
externally, concave within, comprising the palpal organs ; 
they are highly developed, with a strong process curving from 
low upwards, whose termination extends nearly to the articu- 
lation of the cubital and radial jomts and has the appearance of 
being twisted; they are of a reddish brown colour. 
This spider, though smaller than Ergatis benigna, bears a 
resemblance to it, but may be readily distinguished by the 
annuli with which its legs are marked. 
Family AGELENID2. 
Genus AceLensa, Walck. 
18. Agelena Potteri. 
Length of the female, not including the spinners, 23ths of an 
inch; length of the cephalo-thorax 4; bregalth %3 breadth of 
the abdomen 5%, ; length of a posterior leg +3; length of a leg 
of the third pair 34; length of a superior spinner +5. 
_ Eyes disposed in two transverse, greatly curved rows on the 
anterior part of the cephalo-thorax, the convexity of the anterior 
row being directed upwards, and that of the posterior row back- 
wards ; the eyes of each lateral pair are seated obliquely on a 
small tubercle, but are not contiguous; the eyes of the anterior 
row are larger than those of the posterior row, the intermediate 
ones being the largest of the eight. Cephalo-thorax greatly | 
compressed before, convex, hairy, with furrows on the sides di- 
verging towards the lateral margins, and a long indentation in 
the medial line of the posterior region; it is of a pale reddish 
brown colour, with a broad, irregular, longitudinal dark brown 
band on each side, and brownish black lateral margins ; the red- 
dish brown spaces are usually covered with yellowish brown hairs. 
Mandibles powerful, xin vertical, armed with two rows of 
teeth on the inner surface : maxille short, straight, mereasing in 
breadth from the base to the extremity, ‘which is rounded and 
fringed with long hairs on the inner side: lip short, somewhat 
quadrate, being rather broader at the base than at the extremity : 
these parts are reddish brown, the mandibles being the reddest, 
and the maxille and lip palest at the extremities. Sternum 
heart-shaped, with numerous short, pale yellowish brown and 
long erect blackish hairs ; its. colour is dark brown, the middle 
