each sectional thread seems not viscid at all, otherwise the thread 

 would not hang free so as to enable a pair of legs to clasp it. 



The accompanying photograph was made through a f inch 

 objective, from the actual silken trail left on the glass slip (the 

 magnification being 30 diameters). 



By careful measurements from the photograph the average 

 " stride " or distance between the mounds appears to be about Jjj 

 inch. 



I regret that the rate of " walking " was not determined, but 

 under the f inch objective the slip had to be moved fairly briskly to 

 keep the little caterpillar in view, and it would be safe to say that 

 the time of a " stride " did not usually exceed three or four seconds, 

 in which case the larva could travel one inch in three or four 

 minutes. 



