206 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



Cephalothorax : Corselet a long oval; high, truncated, and indented at the base; 

 fosse deep, circular; corselet grooves distinct; cephalic suture decidedh' marked; head 

 quadrate in front, flat on top, with a slight bulge on either side at the middle part, which 

 lifts it a little above the corselet level ; color yellow, lighter on the sides, and darker, 

 tending to brown, upon the caput, which deepens into blackish at the face ; covered closely 

 with gray and yellow pubescence, and two blackish spots upon the knob of the caput. 

 The sternum (Fig. 4c) is shield shaped, with pointed apex and sternal cones, somewhat 

 longer than wide; flattened in the middle; yellow, covered with' pubescence, which is quite 

 thick and long at the margins. Labium triangular, but narrowed into a squarish stock at 

 the base; more than half the length of the maxilla, which are gibbous, inclined toward 

 each other, obtusely triangular at the tips, and colored as the sternum. 



Eyes: Ocular quad (Fig. 4b) on a high prominence, which projects much at the rear, 

 where the eyes are placed on two elevated, rounded, distinct tubercles, and are located 

 well to the sides of the same, thus giving the summit a notched appearance ; the quad much 

 narrower in front than rear, which is wider even than the sides; MF are black, separated 

 about 1.5 their diameter, much smaller than MR, which are light colored, and separated 

 by at least two diameters or more ; but they are so much diverted to the side of their 

 tubercles that it is difficult to estimate the space. Side eyes on low tubercles ; 8F somewhat 

 larger than SR, both much smaller than MF, and greatly smaller than MR; they are 

 separated by «bout the radius of SF ; IMF are removed from SF by about 1.5 their area, 

 and as SR are placed much to the side of SF, the space between them and MR is much 

 greater. Both eye rows are procurved, the front but little, the rear row, which is longer, 

 much more so ; clypeus height about the area of MF. The face is yellowish brown, with a 

 blackish area in front of the ocular quad. The forehead, by reason of the strongly pro- 

 jecting rear eyes, is hidden when the face is viewed from the front. 



Legs : Stout, rather short for the length of the species, yellow, with dark bands on 

 tips of femora, and slight annuli at other joints; well clothed with hairs, and sparingly 

 with short yellowish spines; palps thick, colored as the legs, hairy; mandibles conical, 

 much separated at the tip, covered with hair at the arching base, yellow, with brownish 

 at the fang. 



Abdomex : Ovate (Fig. 4a), the base carried at a wide angle with the cei>halothorax ; 

 contracted in front into a compressed prominence, which is bifid at the top ; color yellow, 

 or grayish yellow, covered thickly with pubescence; an indistinct folium upon the dorsal 

 field, which in some specimens forms an elongated W about the middle thereof On the 

 sides beneath are bands of reticulated white and yellow, marked out by lines of brown or 

 brownish black. The surface is marked by numerous circular rows of impressed dots, 

 brown, smooth, which extend along the sides to the basal front, and to the summit of the 

 frontal tubercle. The spinnerets are prominent, distal. The venter has a dark, brownish 

 yellow band. Tlie epigynum (4d) ha.s a dark brown, glossy, corneous, arched atriolum, 

 which terminates in a short, wide, blackish flap, with two notches on either side ; viewed 

 well from beneath it is hollow, and presents a shelllike appearance. 



Male: The mature specimen in hand (Figs. 5, 5a) is 6.5 mm. long, being equal in size 

 to, or even greater than, the female. The color is darker, the cephalothorax being brownish 

 yellow, the caput lacking the blackish coloring of the female ; the legs less strongly annu- 

 lated, and darker than the female ; abdomen about the same color. The notched compres- 

 sion or tubercle on the middle base of the abdomen is even more distinct than in the 

 female, and the irregular folium upon the dorsal field somewhat better marked ; the skin 

 heavily pubescent, and muscular pits, particularly the median ones, deep. The femora-I, II 

 are wide, the latter particularly so; patella-I is long, and much thinner than the femur; 

 tibia about the thickness of patella, and armed on the inside with rows of long, thick, 

 yellowish brown spines, with a pair on either side of the joint. Patella-II is wider and 

 shorter than I, the tibia thicker, and armed on the inside with a double row of strong, 

 thick, clasping spines, stouter but shorter than those on the tibia-I. Coxse-I are marked 

 by strong spurs at the inside of articulation ; coxse-II, IV have short blackish brown 

 spines, stronger on coxte-IV. Tlie fourth trochanter is also pro\'i<led with a short toothlike 



