"= "= Te. 
DESCRIPTION OF GENERA AND SPECIES. 237 
shaped nest, within which the spider dwells. This trapline and nest are placed above the 
horizontal centre of the orb, but indifferently to the right or left, or directly above the same. 
No. 89. Zilla x-notata (Cirrck). Plate XVIII, Figs. 1, 2. 
1757. Araneus w-notatus, Currck. . . . Svenska Spindl., p. 46, pl. 2, tab. 5. 
1757. Aranea w-notata, Currck . . . . Ibid., p. 154. 
1789. Aranea literata, OLtt1virR . . . . Encyclopédie Methodique, iv., p. 206. 
1802. <Aranea calophylla, WaLcKENAER . Faune Par., ii., p. 200. (In part.) 
1805. Hpeira calophylla, Wauckenarr . Tabl. d. Aran., p. 62. (In part.) 
1832. petra calophylla, Sunpevaun . . Svenska Spindlarness. 
1834. Zygia calophylla, Koon, C. L. . . Herr.-Schaeff., Deutsch]. Ins., 123. 
1839. Zilla calophylla, Kocn, O. L. . . Die Arachn., vi., p. 148, Taf. cexvi., 538, 539. 
1844. Hpeira similis, Buackwaun . . . Ann. & Mag. Nat. Hist., xiii, 186. 
1858. Zilla x-notata, THoRELL .... . Om Clercks Original Spindel-samling, p. 146. 
1861. Zilla x-notata, WestRIna .. . . Aranex Svecice, p. 71. 
1864. Epeira similis, Buackwatt. . . . Sp. G. B. & I, ii., 337, xxv., 244. 
1884. Zilla w-notata, Emerton. ... . N. E. Ep., p. 324, pls. 34, 37, 40. 
1889, Zilla x-notata, McCook ..... Amer. Spiders and their Spinningwork. 
1889. Zilla w-notata, Marx ...... Catalogue Described Aranez. 
Frmate: Total length, 8 mm.; abdomen, 6 mm. long by 5 mm. wide; cephalothorax, 
4 mm. long by 2.5 mm. wide. 
CrrHAtorHorax: A shortened oyal; the fosse a longitudinal depression; corselet 
grooves sufficiently distinct; cephalic suture distinct; caput slightly depressed; color pale 
yellow, with a brownish patch on the summit; glossy, slightly pubescent. The sternum 
longer than broad, rounded at the apex; shield shaped; a wide, rounded, yellow band in 
the middle; sternal cones distinct. Labium subtriangular; yellow, as are also the maxille, 
which are subtriangular at the tip. 
Eyxs; Ocular quad slightly wider behind; a little longer at the sides; MF separated 
by a little more than one diameter; MR, which are smaller, by about 1.5 diameter. Side 
eyes barely contingent ; SR somewhat the larger, but not greatly differing in size; removed 
from MIF by a space about equal to that between MF. Front row recurved, rear row longer 
and procuryed; clypeus height about one diameter MF, 
Lunas: 1, 2, 4, 3; rather stout; sparsely armored with spines; color pale yellow, with 
slight annuli at the joints, and median indistinct annuli on the femora beneath. 
Appomen: Oval; of nearly equal width throughout; the dorsum scarcely, or but little, 
arched; color yellow; the folium outlined with black, the edges being scalloped; skin with 
a subdued sheen. The epigynum is without manifest scapus, and consists of a hood shaped 
atriolum, penetrated by portule on either side; color dark brown. ; 
Mann: Fig. 2a. Length, 6.5 mm. Resembles the female in markings. The legs are 
not so stout, relatively; tibia-II without any special clasping apparatus; not thickened at 
the apex. Color yellowish, with brown annuli at the tips of the joints, and median annuli 
on the femora underneath. The palps (Fig. 2a) are yellow, without annuli; the palpal digit 
rather pointed, and the joints comparatively short. The male Z. x-notata is easily distin- 
guished from the male Z. atrica by the brevity of the palps, and by the absence of the 
row of ten long vertical™hairs on the external side of the front metatarsi. Neither the 
palps nor the feet are so distinctly tinged with rufous-brown color; the hairs on radial 
joints of palps are less thick, and are not of equal length; some are bent downward. In 
Z. atrica all the hairs are vertical and equally long, and the joint itself is very long (8a), 
four times longer than wide. 
Distrisution: New England, New York, California. The species has not been reported 
in the interior States, and may haye been introduced to the Atlantic and Pacific Coasts by 
commercial intercommunication or by emigration. It is widely distributed throughout the 
continent of Europe, where I have collected it as far north as the Highlands of Scotland. 
It is one of the oldest and best known of the Orbweaving species. 
