OCR Text |
Show 432 REV. O. P. CAMBRIDGE O N [June 16, The falces are long, strong, and prominent near their base in front; near their inner extremity in front is a single strong sharp tooth; and along their inner edge, beneath the fang, are some other smaller teeth ; their colour is similar to that of the cephalothorax. The maxilla are long and strong, slightly curved, and inclined to the labium, which is short and of a somewhat semicircular form ; the colour of these parts is similar to that of the legs. The sternum is heart-shaped, of a dark yellow-brown colour, and furnished with a few longish erect bristly hairs. The abdomen is oval, not very convex above, but projecting considerably over the base of the cephalothorax ; it is of a dull blackish brown colour, clothed thinly with hairs. The adult female is larger than the male; the abdomen is more convex above, as well as much larger; the falces want the strong sharp tooth in front near their extremity; but in other respects there is but little difference. The form of the genital aperture is peculiar, and the process connected with it is large and prominent. Two adults of each sex were contained in a small collection of Spiders kindly collected for me in Oregon Territory in 1872 by Lord Walsingham. It is a fine species, and, although allied to several European ones, is yet very distinct from all of them. ERIGONE SPINIFERA, sp. n. (Plate LV. fig. 3.) Adult male, length rather less than 1 line. The cephalothorax of this species is of a dark but dull yellow-brown colour, with the normal grooves and indentations well marked, and (as also the margins) of a darker hue ; it is of a round oval form, the lateral constrictions on the margins at the caput being exceedingly slight; the fore part is bluff and bold ; and immediately behind the eyes is a nearly round but not very large somewhat tuberculiform eminence; and directly behind this the occiput is a little gibbous, giving (in profile) the appearance of a double eminence ; the ocular region, as well as the eminence behind it, is furnished with a few short coarse hairs; and the height of the clypeus is at least two thirds of that of the facial space. The eyes are small, not greatly unequal in size, and, although preserving the usual general position, yet present a remarkable similarity in their actual position to that of the genus Enyo-namely, three groups, two of three eyes each, forming a curved line at each end of a transverse oblong space, and between these two groups is a third, of two eyes near together. This grouping is occasioned by the unusual relative distance between the eyes of the hind central pair, bringing each of them within less than an eye's diameter of the hind lateral eye on its side; those of each lateral pair are seated a little obliquely on a tubercle; the fore centrals are inconspicuous, being seated on a dark spot, and contiguous to each other; the length of the line formed by the eyes of the hind central pair is less than that formed by the two fore laterals, and would almost exactly lie between |