204 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



labium is compressed at the base, triangular at the tip, wider than long. The maxillae 

 are gibbous, rounded upon the outer margin, inclined toward each other, rather longer than 

 broad. The eyes, as in Epeira, have a wide space between the central and sidefront 

 groups; but the intervening spaces are relatively greater, the sidefront being separated 

 from the midfront by about four times their intervening space, the siderear from the mid- 

 rear eyes by even a greater distance. Both rows are procurved, the rear row the longer. 

 The legs, in order of length, are 1, 2, 4, 3, the difference between 1, 2, and 4 being slight ; 

 the tibiae are curved, as in Gasteracantha; the patella is wide, somewhat flattened upon 

 the exterior surface; the ordinary spinous armature is wanting in the female, but the legs 

 are clothed with rows of stout spinelike bristles. The abdomen is cylindrical-ovate or 

 rectangular-ovate in form, about one-third longer than wide. The dorsal margins of the 

 abdomen are characterized by a number of conical tubercles, of which the two forward ones 

 in the typical species are thornlike, sharpened, and curved forward, resembling miniature 

 cow's horns. The dorsal apex is also tuberculated and overhangs the spinnerets, the 

 ventral part of the body having a somewhat conical form. The male resembles the 

 female in general form and pattern; the palps are short, the palpal bulb large, and 

 the copulatory organs prominent, large, and complex. The tibise-I and II are armed with 

 a few short spines. Leg-IV has a series of strong, long spines, arranged the entire length 

 underneath ; while the femora have a row of short, black, denticulate spines. The cephalo- 

 thorax is not as highly peaked as in the female, nor the head as high. 



No. 59. Wagneria tauricornis (CAMBRIDGE). Plate XIII, Figs. 1, 2. 



1889. Epdra tauricornis, MARX in litt. . Catalogue, p. 548. 



1892. Epeira tauricornis, CAMBRIDGE . . Biol. Centr. Amer. Aran., p. 44, vi., 2, 3; viii., 1, 2. 



1892. Epdra tauricornis, KEYSKRLING . Spin. Amer., Epeir., p. 90, iv., 68. 



FEMALE: Total length, 7.8 mm.; cephalothorax, 2.7 mm. long, 1.9 mm. wide; facial 

 width, 1.3 mm.; abdomen, 4.5 mm. long, 3 mm. wide. 



CEPHALOTHOHAX : Corselet rounded at the edges, high and peaked at the summit, 

 descending abruptly to the truncated base ; corselet grooves distinct ; cephalic suture marked 

 so that the head is distinctly differenced from the corselet. Color brown to brownish 

 black, caput dark brown, covered with hair; fosse a deep indentation; caput squarely 

 truncate at the base, rising thence and arched to the vertex, whence it slopes to the face, 

 which is broad and rather quadrate, well rounded on the forehead. Sternum cordate, 

 squarely truncate at the base, where it is tufted with yellowish bristlelike hairs that are 

 sparsely distributed along the margins ; sternal cones distinct, flattened in the middle ; color 

 black to blackish brown. The labium is compressed at the base, yellow ; maxillae scarcely 

 as wide as long, gibbous, yellow. (Fig. Id.) 



EYES : Ocular quad on a rounded and projecting eminence, more prominent before than 

 behind; front somewhat wider than rear, the sides a little longer; MF but slightly, if any, 

 larger than MR, and separated by 1.5 to 2 diameters; MR by about 1.3. Side eyes are on 

 low tubercles; somewhat smaller than those of the middle group. SF separated from MF 

 by 1.5 the area of the latter, or about three times their intervening space; SR from MR by 

 even a greater distance. The clypeus height about 1.5 diameter MF ; both rows are pro- 

 curved, the rear the longer. 



LEGS : Order, 1, 2, 4, 3 ; color yellow to yellowish brown, with dark apical and median 

 annuli, with golden yellow bristles and hairs, with rows of stout spinous bristles on the 

 inter surface, curved toward the apex, and almost comblike, on the metatarsi especially ; 

 the ordinary spinous armature is otherwise wanting; patellae wide, somewhat flattened on 

 the exterior surface ; tibire short and curved, as in Gasteracantha (Fig. le) ; palps colored 

 and armed as the legs ; mandibles rather short, strong, conical, wide at the base, covered 

 rather evenly with short, yellow, bristlelike hairs. 



