42 
Psyche 
[Vol. 89 
The long, tubular eggsacs of U. bispiralis (34-40 mm long and 1 .5 
mm wide) have no angular projections (Fig. 9) and resemble those 
of Miagrammopes (Lubin et al. 1978). They are suspended along the 
radius of a former web of which only a few radii and frame threads 
remained intact. There was no evidence of sticky silk in the four 
eggsac webs examined. Spiders sat in line with the eggsacs, with legs 
I and II extended forward and legs IV grasping the eggsac, and were 
reluctant to move even when prodded. 
Uloborus albolineatus* 
One individual of U. albolineatus was observed on a cone web 
similar to that of U. bispiralis. The rim spiral had one or two zigzag 
outer loops, and both the cone and inner orb had jagged loops of 
sticky spiral. The inner orb non-sticky spiral extended almost to the 
rim spiral. The female sat at the hub with legs I and II extended 
forward and held together and legs IV extended backward. 
Uloborus sp. (2072) 
Only a single web was seen. It consisted of a somewhat inclined 
orb (43° with horizontal) with a cone underneath it which contained 
loops of sticky spiral (Fig. 10a, b). This web differed from those of 
U. Conus in having sticky spiral threads near the center of the 
horizontal orb (Fig. 10c) as well as near its edge, as well as having 
some of the “radial lines” of the cone attached directly to the frame 
of the orb while others ended on radii as in U. conus webs. 
At the hub the spider sat in a “crouched” position (Fig. 10a) 
similar to that of Philoponella (Opell and Eberhard in prep.), and 
was reluctant to move away when disturbed. 
Uloborus trilineatus Keyserling 
Most of the many webs of mature and immature U. trilineatus 
individuals observed were typical, more or less horizontal orbs like 
those spun by other Uloborus species (e.g., Szlep, 1961; Wiehle, 
1927; Eberhard, 1972). Webs of mature males were similar to those 
of newly emerged uloborid spiderlings (Szlep, 1961; Eberhard, 
♦This is a new species, described below. 
