DESCRIPTION OF GENERA AND SPECIES. 185 



the middle, and two triangular yellow marks at corner of the gills, and four patches at base 

 of the dark brown spinnerets. The epigynum (Oa) has a prominent scapus, wide at the 

 base, narrowing toward the tip, which is spooned ; and in some specimens the seminal 

 chambers are prominently displayed, as in Plate XI., Figs. 5a, 5b. 



Male: Plate IX., Fig. 7; Plate XI., Figs. 5a, 5b. Differs little in markings from 

 female ; cephalothorax a warm yellow or yellowish brown ; legs bright yellow, with brown 

 annuli ; alidomen with cretaceous field and shield shaped folium, with denticulate edges ; 

 shoulder humps not pronounced, and appear in some specimens almost wanting. Tibia-ll 

 curved, thickened, and provided on the inner and under side, from about midway, with a 

 double and jiartly triple row of black, toothlike clasping spines. Coxa-II has at its base 

 a long rounded spur, and coxa-I at the articulation with the trochanter a brown, short, 

 chitinous, curved spur. The palpal bulb is rounded, the base provided with a blunt, 

 curved spur ; the radial joint much widened at the base, the apex a truncated cone ; the 

 cubital joint is short, rounded, and provided with two long spines. 



Distribution : This is a European species, and may have been introduced by com- 

 mercial intercommunication. My specimens locate it along the Atlantic Coast from New 

 England to North Carolina, in the Adirondack Mountains, and in Pennsylvania. Dr. Marx 

 notes it as far north as INIaine, and through Massachusetts to Pennsylvania. It will prob- 

 ably be found to aftect more closely mountain regions or high elevations. 



No. 43. Epeira cavatica Key.serlisg. Plate X, Figs. 1, 2; PI. XI, Fig. G. 



1881. Epeira cavatica, Keyserlixg . . Verb. Zool. Bot. Ges. Wien, p. 269, xi., 1. 



1884. Epeira cinerea, Emerton . . . . N. E. Ej)., p. 302, pi. 33. 



1889. Epeira cavatica, McCook .... Amer. S[nders and their Spinningwork. (Ibid., 



E. cinerea, ad part.) 

 1892. Epeira caealica, Keyserling . . . Spinn. Amerik., Eper., 118, vi., 87. 



Female: Total length (two specimens), 18 mm., 13 mm; abdomen, 12.8 mm., 10 mm. 

 long, 11.3 mm. and 7 mm. broad; cephalothorax, 7 mm. long, 5.8 (6) mm. broad; width of 

 head, 2.5 mm. 



Cephalothorax : Corselet yellow, with brownish hue at sides and on grooves and 

 median fosse; moderately high; sparsely covered with long, fine pubescence; fosse and 

 cephalic suture deep ; head depressed, flat on top, rather narrow at the face. Sternum codi- 

 form; longer than broad, with sternal cones; covered with bristles; color of sternum, 

 labium, and maxillfe, brown, the latter lighter and yellow at the tips. 



Eyes: Ocular quad elevated, the width in front greater than length, and narrowest 

 behind ; MF separated by 1.5 diameter ; :MR somewhat smaller than MF, separated by two- 

 thirds diameter; lateral eyes smaller, nearly equal in size, separated by about tbeii- radius; 

 MF from SF about 1.5 their area. Clypeus 1.5 to 2 times diameter MF ; front eye row 

 slightly recurved, longer rear row procurved. 



Legs: 1, 2, 4, 3, as follows: Two specimens, 29 (32) mm., 27.6 (31) mm, 25 (2S.5) mm., 

 17.2 (19.5) mm. Color yellow, with median distal brown annuli. In some specimens the 

 median rings are extended almost to cover the metatarsi and patellae; long and not robust, 

 thickly covered with bristles and gray pubescence except at the tarsi, and with yellow 

 spines, brown at the base. Palps yellow, armed as legs; mandibles yellow or brown. 



Abdomen: Yellowish or brownish color, and in many specimens, on account of the 

 numerous gray hairs and white bristles which densely cover the dorsum, assuming in life a 

 quite gray appearance ; dorsum arched in gravid specimens, subtriangular, with shoulder 

 humps ; on the basal half a rather indistinct folium, broadest in front, narrowing toward the 

 apex, the edges bordered by a yellow scalloped band ; the sides with dark black stripes 

 extending to the venter, which has a broad black band in the centre passing from the 

 gills and surrounding the spinnerets ; this at each side bordered by a narrow, yellow, curved 

 stripe; at base of spinnerets on either side two small yellow spots; epigynum rather short, 

 wide at the base, channeled throughout, somewhat narrowing toward the tip ; a line of 



