132 
THE BROWN-TAIL Mo ill. 
in winter are those of the brown-tail moth. The tent- 
caterpillar and fall web-worm both make webs which often 
remain on the trees over winter, but they are weatherworn, 
thin webs, with no caterpillars, and are much larger. The 
curled elm leaves caused by the elm aphis often remain on 
Fig. 16.— Old web of tent caterpillars. 
Fig. 17.— Web of fall web-worm cover- 
ing foliage. (After Weed.) 
the trees over winter and may prove misleading to one 
whose eye is not trained to detecting the brown-tail webs. 
The eggs of the rusty tussock moth frequently found on 
fruit trees, especially plum, are often brought in for the 
eggs of the brown-tail where bounties are paid for its webs, 
but as the brown-tail's eggs are laid only in summer there 
should be no confusion. 
