1978] Lubin, Eberhard, & Montgomery — Miagrammopes 7 
Figure 4. Movements of a female M. intempus, illustrating how thread attach- 
ments are manipulated. Letters mark spots on horizontal thread. The spider rested 
(a) holding both sticky lines with its front legs, and a third, short, non-sticky line 
with its hind legs at point * (the ends of the capture threads were not drawn as they 
could not be seen). When lured out onto the horizontal sticky line, the spider car- 
ried the vertical thread for some distance (b), then attached it to the horizontal line 
and continued on (c). When she returned, she shifted the point of attachment of the 
vertical thread again (d), then turned around and pulled in the line with her front 
legs and resumed her original position (e). The shifts in attachment were extremely 
rapid; the actual motions involved could not be followed, and the shifts were noticed 
only by comparing thread positions before and after the spider passed by. 
