176 MISSOURI BOTANICAL GARDEN. 
lieved that if the weather exposure weakens them, they 
were tested at the time when they were weakest. 
The first analysis of the measurements made deals with 
the size of the bands and their relation to the size of the 
twigs to which they were attached. It has already been 
stated that attempts were made to cause the insects to weave 
bands around large twigs, but in every case the insect 
refused to do so. On Table I the bands taken from 
RELATION OF DIAMETER OF MAPLE TWIGS TO WIDTH 
OF BAND. 
Width Diam Total 
a Twig. io)? as | oe as) eae ae ee eee 
mm, mm, width 
1 8 2 1 6 2 14 
1.5 2 13 6 2 23 
2 tS ae bee 46 16 | 12 3 2 1 114 
2.5 4 | 16 28 12 5 65 
3 beep | 8 52 16 | 18 5 1 1 122 
3.5 a: 4 4 11 6 3 1 30 
4 4 5 10 1 5 1 1 1 28 
4.5 1 2 8 
5 2 + 1 1 8 
5.5 1 1 
6 1 1 
6.5 0 
7 2 2 
7.5 1 1 
8 1 1 
Total bands per 
CW ee a ea” BVA OB. 7671-869 65 | 43 | 10 6 3 413 
TABLE I. 
maple twigs are arranged according to their width and 
according to the diameter of the twigs. It will be 
noted that the largest number of bands occurred on 
twigs 3 mm. in diameter, and that there is a regular 
falling off towards both sides; in other words, the insect 
seems to select twigs having a diameter of about 3 mm. 
