356 The Ohio Journal of Science [Vol. XIX, No. 6, 



of palp almost spherical, on the outside a dark forked process the upper 

 tooth of which turns outward; above this is the end of the short, fine 

 tube which ends on a clear swollen area; on the inside of the palpal 

 organ is another forked process directly opposite the first but not 

 quite so large nor so clearly marked. (PI. XV, Fig. 3). 



One male from Columbus, Ohio, June 10, 1917. 



Prosthesima lutea n. sp. 



Male: Length 5.5 mm. Head, thorax, legs and shield on the 

 base of the abdomen uniform light brownish yellow. Abdomen cream 

 colored, covered with long black hairs, which gives the whole a greenish 

 tinge, the dark edges of a long narrow lanceolate basal mark are visible 

 through the shield and extend a short distance beyond the second pair 

 of muscular impressions. The first pair of muscular impressions are 

 rather prominent, just inside the edge of the shield. Spinnerets and. 

 venter cream colored. Tibiae of first and second legs with one spine 

 on the anterior side below, slightly beyond the middle, and one at the, 

 extreme end, none on the posterior side. P. M. E. large, oval, clos^, 

 together. P. S. E. about the same size as the A. S. E. and close to them., 

 A. M. E. large, half their diameter apart, almost touching the A. S. E.; 

 Palpal organ ending in a tube which curves upward toward the tip of 

 the tarsus. Tibia of palp with a short spur on the outside, which is 

 prolonged dorsally in a delicate spine. (PI. XV, Figs. 5a, 5b). 



One male from Sugar Grove, Ohio, July, 1915. 



Cybaeus silicis n. sp. 



Male: 8 to 10 mm. long. Cephalothorax and legs light brownish 

 yellow. Cephalothorax high, evenly rounded, a dark V-shaped mark 

 with its point at the dorsal groove, a narrow dark line at the extreme 

 margin. Dorsal groove dark. Mandibles reddish, robust at base, 

 furrow armed in front with two large and one small teeth, and in back 

 with three small and three or four minute teeth. Abdomen high, 

 highest at the front, widest behind the middle, dull gray with a white 

 basal lanceolate line and six or seven white spots on each side of the 

 median line, the anterior spots round, the middle elongate, the posterior 

 diagonal lines or joined with those of the opposite side to form bars. 

 Venter white. Palpus long, femur longer than patella plus tibia, 

 patella widened distally with a group of about ten minute conical spines 

 on the extended side; tibia with a large, flattened tooth. (PI. XV, 

 Fig. 7b). 



Female much like the male. Epigynum with a broad opening which 

 apparenth^ opens below into a pair of dark sacs, at the sides are two 

 round dark bodies. (PI. XV, Fig. 7a). 



Several pairs from Bainbridge, Ohio, August 17, 1917, 

 where they were found on the sides of large boulders more or 

 less buried in leaves and humus in a deep ravine. A few 

 specimens from Rockbridge, Ohio. 



