OCR Text |
Show 214 REV. O. P. CAMBRIDGE O N [Mar. 16, punctures, and clothed thinly with short hairs ; the sides (below the coriaceous epidermis of the upper part) are yellowish, marked with indistinct longitudinal bars of a blackish hue ; the spiracular plates, and a portion of the surface surrounding the spinners, are of a red-brown colour, the rest of the underside being coloured like the sides. The adult female is rather larger than the male, and wants the occipital eminence, the coriaceous epidermis of the abdomen is of a similar nature, but does not extend so far backward. The genital aperture is, as usual, of characteristic form (see d, fig. 20). This species is nearly allied to Erigone nemoralis (Bl.) ; but the male may be at once distinguished by the strongly bilobed form of the occipital eminence, this peculiarity being scarcely perceptible in that species ; another closely allied species also-E. pavida (Cambr.), found in Palestine-may be distinguished by the perfectly confluent form of the upperside of the occipital eminence; and from both these species the present one differs in the form of the palpi and structure of the palpal organs. A n adult example of each sex was received from M . Eugene Simon, by w h o m they were found near Troyes, France. ERIGONE CORRUGIS, sp. n. (Plate XXIX. fig. 21.) Adult male, length rather under 1 line (about -^ of an inch). The colour of the cephalothorax of this Spider is yellow-brown ; the thoracic region suffused with dusky blackish, and the lateral margins edged with black ; the sternum is rather darker, while the falces, maxillae, and labium are similar to the cephalothorax in colour, the legs and palpi being pale yellow. The caput has its fore part full, bluff, and rounded ; on the upperside towards the occiput is a tolerably strong eminence, of a somewhat bent form (looked at in profile), and directed forwards; this is caused by a strong indentation or excavation in front at its lower part where the caput proper begins; this excavation is a good deal obscured by numerous short bristly hairs, which, springing from the fore part of the eminence as well as from the caput below, meet across it. A considerable portion of the upperside of the fore part of the caput is clothed with short hairs, including the two lateral as well as the lower central pair of eyes. There are also two longish erect bristly hairs in the median line of the upper part of the cephalothorax-one at the base behind the occipital eminence, the other at the thoracic junction. The eyes are small, in the ordinary position; those of the upper pair, separated from each other by no more than an eye's diameter, are placed in front on the upperside of the occipital eminence ; those of each of the other three pairs, respectively, are contiguous to each other, and placed in a transverse straight line comprising the whole width of the fore part of the caput just below the gap between it and the occipital eminence ; the eyes, looked at from the front, thus form a subtriangular figure, whose base is longer than a perpendicular line let fall upon it from the obtuse angle formed by the upper pair of eyes ; the height of the clypeus exceeds half that of the facial space. |