22 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
MEASUREMENTS (in mm).—7 females and 9 males: 
females males 
mean range mean range 
Total length, excluding caudal 
setae 2. 18 1, 87-2.43 1.96 1, 73-2. 32 
Length of prosome 1. 38 1, 22-1.53 1. 24 1. 08-1. 44 
Width of prosome 1. 20 1, 13-1..26 ~=« 1, 06 0. 95-1. 13 
Length of cephalothorax 1. 06 0.95-1.13 0.94 0. 83-1. 06 
Length of genital segment 0. 56 0.49-0.67 0.49 0. 45-0. 58 
Width of genital segment 0. 59 0. 50-0. 61 0. 40 0. 22-0. 47 
Length of abdomen 0. 21 0. 11-0.32 0.15 0. 13-0. 18 
Length of egg strings (5 strings) 1. 63 1. 44-1. 80 
Description.—Female cephalothorax (fig. 10a) consisting of 
cephalon and first 2 thoracic segments, strongly arched in transverse 
section. Frontal region narrow, projecting slightly past anterior end of 
cephalothorax, with wide membrane along anterior surface, mem- 
brane with median notch. Lateral margins convex, bearing fine mem- 
brane posteriorly; posterior lateral region lobate, extending posteriorly 
to posterior half of second pedigerous segment, with small cup-shaped 
indentation laterally, indentation associated with single hairlike 
process (not shown on figure). Single pair of major dorsal cephalo- 
thoracic grooves present, extending anteriorly from junction of 
posterior lateral and posterior median cephalothoracic regions, 
terminating in anterior half of cephalothorax. Ocular region (fig. 10f) 
distinct, situated at anterior end of cephalothorax, overlaid by small, 
anteriorly lobed plate. Pair of heavily sclerotized, knoblike projections 
present just anterior to plate, similar in shape, and position to con- 
spicilla of Nesippus. 
Female free second pedigerous segment approximately two and 
one-half times as wide as long, division between cephalothorax and 
third pedigerous segment distinct. Lateral regions lobate, extending 
posteriorly to posterior region of third pedigerous segment, without 
membrane along outer margin. Third pedigerous segment approxi- 
mately three times as wide as long, with slight posterior extensions of 
lateral regions. Fourth pedigerous segment distinct from third, 
approximately three-fourths its width, length approximately one-half 
the width. 
Female genital segment (fig. 10d) varying in shape from ovoid to 
circular, separated from fourth pedigerous segment by short, necklike 
formation with pair of small, saddle-shaped areas of heavy sclerotiza- 
tion laterally. Dorsal surface of genital segment platelike, anterior 
two-thirds of ventral surface bearing numerous (up to 60) bifid spines 
(fig. 10e). Fifth leg (fig. 12f) situated on ventral posterior lateral 
surface, consisting of palp bearing 3 plumose setules and 1 lightly 
