232 AMEEICAN SPIDERS AND THEIR SPINNINGWORK. 



than a diameter; MR separated a little less than a diameter; side eyes on tubercles, about 

 equal in size; almost contingent; SF removed from MF by about the area of the latter, the 

 intervening space being about 1.5 MF; front row recurved, longer rear row slightly pro- 

 curved; clypeus height about two diameters MF; the front eyes project somewhat beyond 

 tlie bases of the mandibles. 



Legs: 1, 2, 4, 3; stout, of uniform yellow color, well provided with yellowish hairs, 

 and a few short, feeble, dark spine.s, with a few stout bristles ; the palps are colored as the 

 legs; the mandibles conical, yellow, thick at the bases, and slightly retreating towards the 

 sternum. 



Abdomen : Oval, considerably longer than broad ; slightly thicker across the shoulders, 

 and diminishing but little towards the apex, which is high above the spinnerets; the latter 

 placed immediately beneath the apical wall ; the base extends well over the corselet. The 

 dorsum has a broad, median, yellow ribbon, in the centre of which runs longitudinally, the 

 entire length, an irregular thread of brownish hue ; on either side are longitudinal bands 

 of brown extending to the base in front, and quite to the spinnerets posteriorly. These are 

 followed on each side by a band of yellow similar to those on the dorsum, and this again 

 lower down upon the sides by a broader longitudinal band of brown, which extends to the 

 venter. These markings give to the dorsum the appearance of being longitudinally striped. 

 The skin is glossy, pubescent, and reticulated over the entire surface. The original color of 

 the specimens is lost in the alcohol, but appears to be brown and yellow. The venter has 

 an oblong band of yellowish brown, with a bright marginal ribbon of yellow on either side, 

 the latter surrounding the dark spinnerets in interrupted lines. The epigynum (Fig. 3a) 

 has a rather wide atriolum, with a short, rounded, subtriangular scapus extending a little 

 beyond the margins of the portulie, which are slits under the atriolum. 



The male (Fig. 4) is somewhat smaller than the female, being 4 mm. in length. In 

 marking and color it quite closely resembles the female, but the hues appear to be some- 

 what ligliter. The palpal digits are distinguished as in Fig. 4a. 



Distribution : Georgia and North Carolina. Specimens jiresented by Mr. Thomas Gentry. 



No. 84. Singa nigripes Keyserling. Plate XIX, Figs. -5, 6. 



1863. ,'^lixja nii)ripe.i, Keyserling . . . Xeue Spinn. Amer., v., p. 655, pi. 21., Fig. 7. 



1889. Siyiga nigrijK's, Marx Catalogue, p. 549. 



1893. Singa nigrqjes, Keyserling . . . Spinnen. Amerik. Epeir., p. 290, xv., 214. 



Female: Total length, 3.5 mm.; abdomen, 2+ mm. long, 1.75 mm. wide. The general 

 colors are orange and yellow, and on the abdomen a light reddLsh yellow or ash color, 

 except on the legs, where the last three members in most species are black or blackish. 

 This peculiarity of the feet casually marks the species, in connection with the black spots 

 on the abdominal dorsum. 



Cephalothokax : A well rounded oval, elevated in the centre, sharply sloping behind 

 the caput; prominent, squarish, slightly pubescent; corselet and head a uniform orange, 

 with a sliglitlj' darker shade on the marked cephalic suture; the sternum heart shaped, 

 almost triangular, wide in front, much rounded at the apex ; sternal cones distinct, flattened 

 in the middle, very slightly pubescent; color orange yellow, uniform with the surrounding 

 coxte and the mouth parts; the width in front almost equal to the length. Labium tri- 

 angular; raaxillaj as broad as long, cut square at the tips. 



Eyes: Ocular quad on a rounded eminence, whose interior is blackish, thus sharply 

 contrasted with the orange color of the face; front somewhat narrower than rear, the sides 

 somewhat longest; MF slightly smaller than MR, separated by about one diameter, MR by 

 a less space. MF from SF by about their area, the intervening space about that between 

 MF and MR. Side eyes on a slight tubercle; contiguous; SR separated from !MR by a 

 space about equal to the area of the latter; clypeus high, the mai-gin separated from MF 

 by at least three or more diameters. Front eye row recurved, rear row slightly procurved, 

 nearly aligned. The caput somewhat contracted at the face, which projects over the 

 mandibles. 



