186 
Psyche 
[Sept. 
thirds as wide as long, pale yellow with a vague gray 
median stripe on the posterior half, with scattered long 
bristles, venter pale, with the fold only slightly anterior 
to the middle; legs, IV pair missing, pale, with no spines 
but rows of hairs ; palpus, left palpus missing, not as long 
as the cephalothorax, very simple and best understood 
from the figure. 
Holotype ? Puerto Pico; Luquillo Mountains, 3,000 
feet, July 1944 (Beatty). 
Allotype Puerto Pico ; Luquillo Mountains, 3,000 feet, 
July 1944 (Beatty). 
The male and female differ in size, shape and color 
markings, but they probably belong together as they have 
the same three structural characters that are unusual in 
the Theridiidae, the posterior median eyes the largest, the 
convex sternum and the relatively short legs. The female 
is quite conspicuous with the distinct dark markings on 
the cephalothorax and the abdomen, and the abdomen 
much wider than long. 
Family Argiopim: 
Genus Tetragnatha Latreille 1804 
Tetragnatha parva spec. nov. 
Figures 5, 8 
Male. Length, 3.0 mm., without mandibles, ceph. 1.1 
mm. long, 0.8 mm. wide, abd. 2.0 mm. long, 0.6 mm. wide. 
Cephalothorax a deep yellow, anterior margin little 
narrowed, cephalic portion slightly raised, no thoracic 
groove but a slight transverse depression ; eyes cover the 
anterior margin, each eye heavily ringed with black, 
anterior row slightly recurved, a.m.e. separated by less 
than a diameter, a.l.e. very small, posterior row recurved, 
eyes subequal with a.m.e., p.m.e. separated by little more 
than a diameter and from p.l.e. by about a diameter and 
a half, lateral eyes on separate tubercles that touch at 
the base but the eyes are separated by more than a diame- 
ter of p.l.e.; quadrangle narrower in front and wider 
behind than high ; clypeus almost wanting below a.m.e. ; 
mandibles porrect, basal two-thirds swollen, with a sharp 
tooth or cusp at the end of the swollen area, fang groove 
