A REVISION OF THE PISAURIDAE OF THE UNITED STATES Pail 
Pelopatis undulata (IKeyserling ) 
Verh. Zool. Bot. Ges. Wien., 1887, 37:486, pl. 6, fig. 42 
Type. Tetragonopthalma undulata Keyserling; type speci- 
men not known to exist 
Type locality: Archer, Fla. (Marx collection) 
Female (alcohol). Length 11-19mm; legs, 1-4-2-3; pl. 3, fig. 1; pl. 4, 
figs. 2-5 
Cephalothorax above dull yellow sparsely clothed with yellowish 
brown hairs; on the disk, two irregular bands slightly darker, sepa- 
rated by the dorsal groove and a narrow, dark line extending from 
groove to posterior median eyes; a narrow, sub-marginal, dark line 
along sides of thorax to cervical groove. Eyes almost equal in 
size; posterior lateral slightly larger and anterior lateral perhaps 
smaller; four anterior eyes form a triangular area over twice as 
wide anteriorly as long; first row (anterior lateral) much wider 
than third row (posterior median). Clypeus very narrow, scarcely 
the width of an anterior median eye; seen from above, the anterior 
lateral eyes appear to project from anterior margin of head. Cheli- 
cera in color like cephalothorax and with mixed short and long hairs; 
lower margin of the furrow with three teeth (pl. 4, fig. 4). Abdo- 
men above yellowish white; a median dusky band with edges gently 
scalloped extends to spinnerets; through centre of dusky band at 
base, a lanceolate mark and on each side of this a black dot; 
venter of abdomen behind genital furrow pale yellow. Legs light 
yellowish brown, lighter beneath; unmarked except for dark spots 
at base of spines. Sternum, labium and endites pale yellow. Fpi- 
gynum resembles that of Thanatidius tenuis Hentz and 
IP ih Sey bl seal soley) seal ae ea, 
Male: length 9-14 mm; legs 1-4-2-3; pl. 3, fig. 2; pl. 4, fig. 1. 
The male resembles the female in color but the abdomen and 
legs are proportionally longer and more slender. The abdomen above 
has the median scalloped band only slightly developed or absent 
but the basal lanceolate mark is usually evident with its accompany- 
ing black spots. The palpus (pl. 4, fig. 1) resembles that of 
Pisaurina mira; the tibia however, is longer and slimmer 
and has the apophysis shorter and directed forward. 
Mature males are in the collections at Cornell University and 
the Museum of Comparative Zoology, Cambridge, Mass. 
