DESCRIPTION OF GENERA AND SPECIES. 271 



row is recurved, the rear row procurved. The margin is swollen on either side of the 

 median line, just above the insertion of the mandibles. 



Leas: 1, 2, 4, 3; uniform yellow, without spines, but with abundant, long, aculeate 

 bristles ; the palps are colored and clothed as the legs ; the mandibles are long, decidedly 

 curved, a warm yellow brown color, with three to four strong teeth, wide at the tips, which 

 are tufted with long bristles, the fang long, narrow, and slim. 



ABDOMEN : An elongated oval, rounded at the base, narrowing to the spinnerets, which 

 are distal. The dorsal field is yellowish brown in color, with longitudinal, reticulated bands 

 of yellow along the margins, and a divided band of similar color along the median line. 

 The skin is soft, reticulated, and covered with soft, short pubescence. The venter has a 

 long, attenuated, yellowish band extending between the spinnerets, with blackish margins, 

 and the epigynum presents an arched atriolum, without a scapus, but somewhat swollen in 

 the centre. 



MALE: (PI. XXVIII., Fig. 1.) In size, form, and color the male resembles the female. 

 The abdomen is the same elongated oval, the length at least twice the width, relatively 

 longer than with the female. The folium, as with the female, is marked by broad mar- 

 ginal stripes of yellow on the side, bordered on either flank with interrupted lines of 

 blackish, and in the centre a broken band of yellowish, reticulated color; the surface is 

 strongly pubescent. The fosse is a longitudinal oval slit. The eyes (la) are upon a strongly 

 elevated quad, the rear side of which is, relatively to the front, wider than with the 

 female. On the clypeus is a diagonal ridge, extending about half way from the margin to 

 the midfront eyes. The mandibles (Ib) are long, convex on the apical half; the fang 

 somewhat curved, uneven on the exterior surface, and a strong, black, triangular projection 

 or tooth on the interior surface ; close to the base of the fang is a very long, blunt, curved 

 tooth. For palp see Fig. Ic. 



DISTRIBUTION: Philadelphia, New York, Texas (Marx). Doubtless widely distributed 

 throughout the United States. 



No. 118. Pachygnatha furcillata KEYSERLING. Plate XXVIII, Fig. 3. 



1884. Pachygnatha furcillata, KEYSERLING . Neue Spinn. aus Amer., v., 662; xxi., 11. 

 1889. Pachygnatha furcillata, MARX .... Catalogue, p. 552. 



FEMALE: In the Marx collection there is one female specimen, identified by Keyser- 

 ling as of this species. Keyserling has distinguished it chiefly by the side outline of the 

 mandibles (Plate XXVIII., Fig. 3). The specimen is 5 mm. long, and resembles P. brevis 

 closely. The ocular quad appears a trifle wider in front than behind, instead of the 

 reverse, as in brevis ; but I am inclined to think the two identical. 



DISTRIBUTION: The species (or variety) has been collected in Philadelphia and the 

 District of Columbia. 



No. 119. Pachygnatha Curtisi, new species. Plate XXVI, Figs. 5, 5a-b. 



MALE: Total length, 5 mm.; cephalothorax, 2.5 mm. long by 1.5 mm. wide; abdomen, 

 3.5 mm. long by 1.3 mm. wide. General colors, dull yellow, mottled With black. The 

 spinous armature of this species shows a marked difference from its congeners; but the 

 characteristics are otherwise so distinctly of this genus that it is placed here. 



CEPHALOTHORAX: Cordate; the fosse a conical pit; corselet grooves distinct; cephalic 

 suture well marked ; color yellow, with streakings of blackish brown along the grooves, 

 the suture, and on the base. The head is wide, quadrate, colored as the corselet, with 

 lighter yellow in front. Sternum nearly as wide as long, covered with gray bristles, black 

 along the margins, and muddy yellow in the centre. Labium subtriangular ; less than one- 

 half the height of the maxilla;, which are somewhat longer than wide; subrectangular in 

 form, the tips roundly truncated, and wider than the rest of the organ. 



