1978] Lubin, Eberhard, & Montgomery — Miagrammopes 17 
Figure 10. Egg sac web spun at night by a Miagrammopes sp. 1 (ca. unipus) 
female. The horizontal web is seen from above, with the tubular egg sac hanging 
down from the “hub.” One end of the sticky “spiral” hung free and had probably 
been connected to the radius just to its right. The spider rested near the hub, out 
of contact with the egg sac. 
small insect was placed on the sticky silk, the spider attacked and 
fed on it. During the day this rudimentary orb was gone, and the 
spider was back in the cryptic posture at the end of the egg sac. 
Emergence of spiderlings 
We observed emergence of spiderlings from one egg sac of M. 
sp. 1. The spiderlings were first seen one evening easing themselves 
through several ragged holes in the sac. They left behind, inside 
the empty sac, empty egg shells each with a pink moulted skin stuck 
to it. These second instar spiderlings (terminology of Hite, et al. 
1966) were relatively inactive and stayed on the sac itself, holding 
their anterior legs in an unusual position (Fig. 1 1). The next morn- 
ing, they had all moulted again, and the cast skins remained on the 
surface of the egg sac while the spiderlings wandered actively in the 
vial, holding their legs normally. These spiderlings (third instar) 
had fully developed cribella and calamistra. 
