8 BULLETIN 1142, U. S. DEPARTMENT OF AGRICULTURE. 
2. Odorous band (horizontal). 
Gipsy moth tree-banding material, 1£ inches high, 2-| inches wide, 6 inches 
long, sides vertical, on a sheet of white paper. Band br dged about in middle 
with strip of cheesecloth (medium mesh, 29 by 34 threads per square inch) 
1 inch wide; cloth fitting closely to band at all poin s and extending from 
base of one side to base of opposite side. Odor of hand strong, irritating 
writer's nasal membrane at a distance of 2 or more feet. 
3. Strip of stiff white paper 4 inches long and 1 inch wide. 11 
4. Paste band (horizontal). 
Flour paste band made of white wheat flour and water, -^ to -fa inch high, 1 
inch wide, 3 inches long, on a strip of paper like and of the same dimensions 
as 3. 
TESTS. 
The caterpillar was placed on the paper 6 inches from and facing the odorous 
band (2) at 2.43 p. m. It made straight for the band for about 2 inches, then 
turned at a diagonal, and con inuing in the same general direction went around 
the end of the band. It approached within 2 inches of the band. 
Second placing (as before) : The caterpillar turned out of a stra'ght course. 
3 inches from the band, and when within | inch of it veered away still more 
(now parallel to the band), and, crawling along the band at that distance- 
its longer hairs brushing the band — t crawled away. 
Third placing: The results were, similar to those just described. 
Fourth placing : The results were similar to those last described. 
Fifth placing : The caterpillar turned out of a straight course about 4 inches 
from the band and went around the end. It approached within 1 inch of the 
band. 
Sixth placing: The caterpillar turned out of a straight course abou' 4 inches 
from the band, veered off still more when about If inches away, and crawled 
off the sheet of paper parallel to the band at the lat er distance. 
Seventh placing: The caterpillar moved straight to within about $ inch of the 
band and hesitated, then continued to the band and apparently touched it — with 
the mouth parts as well as with the first pair of legs — then turned away. It 
repeated the procedure soon after on the adjoining side of the bridge, and 
crawled away. 
Eighth placng: The caterpillar paused about \ inch from the band, then 
moved closer and swung upon the side with two pairs of legs, but swung off 
after touching it with its mouth parts, and after another pause backed slowly 
away. Soon it moved up to the band again and af er touching it with its 
mouth parts turned away nervously. Soon after this it approached close to 
the band a third time, but turned away apparently wi hout touching it ; then 
crawled away. 
Nnth placing: The caterpillar began to turn out of a straight course about 
1 inch from the band but turned toward it again when the strip of paper (3) 
was placed in its way (the paper being held at one end of the longer axis and 
interposed in the way of the caterpillar with the shorter axis either vertical 
or at an angle to the horizontal plane of the sheet of white paper on which 
the caterpillar was crawling). After some hesitation the caterp liar swung 
upon the side of the band with the first pair of legs, and after touching the 
band wi:h its mouth parts, swung off and crawled away, crawling across the 
interposed strip of paper. 
Tenth placing: The caterpillar turned at an angle about 3 inches from the 
band, but veered back somewhat when the strip of paper was placed in its way. 
It crawled right over the strip of paper, however, when about If inches from 
the band, and crawled away, rearing and swinging its head. 
Eleventh placing: The caterpillar turned out of a straight course about 
3 inches away and stopped for a few seconds when the strip of paper was 
interposed, then to within \ inch of the band — guided by means of the strip 
of paper — and paused. Following another pause, about \ inch away, it turned 
and crawled away over the strip of paper. 
11 This strip of paper, identical with that on which the paste band was placed, was used, 
as will be seen below, in the same manner as 4, and was designed as a check upon the 
latter — to make sure it was the soft and viscid quality of the band that forced the cater- 
pillar on the bridged odorous band rather than the mere object or obstacle placed in its 
way. 
