10 BULLETIN 1142, TJ. S. DEPARTMENT OF AGRICULTURE. 
moist and dark, as it had been for some time, saturated with the banding ma- 
terial). Continuing nervously the caterpillar crossed the band and crawled 
away. It got off the bridge, on bare material, once, when on top of the band, 
but with no more than two pairs of legs, and drew back quickly. 
Nineteenth placing: The caterpillar hes tated, reared, and started to turn 
, out of its course about 5£ inches from the band, but on touching the paste 
band with the first pair of legs, it turned toward the band again. It did not ad- 
vance, however, but reared, swung its head, and backed up. Then, swing- 
ing to one side, it started to crawl out of a straight course again (in the oppo- 
site direction from that in the former attempt), but on touching the paste 
band, wh*ch had been placed in its way again, with the first pair of legs at 
least, it turned once more toward the band and when within about 4* inches 
of it, stopped. It now swung its head and turned to one side, and on touching 
the paste band, which was waiting for it, it swung in the opposite direction 
and started to turn away still farther from the band. On being interrupted 
by the paste band again, it turned once more toward the band, and. after some 
hesitation, started forward. Stopped about | inch away (opposite the bridge), 
and after rearing and swinging its head, it turned at a right angle and started 
crawling parallel to the band. On touching the paste band it turned com- 
pletely around and started in the opposite direction, but on touching the 
interposed paste band again it turned in the direction of the band once more. 
On reaching the band it hesitatingly swung upon the bridged portion, and, after 
brushing the cloth with its legs, it swung over on the bare part. Then, after 
touching here once or twice, it swung off the band altogether. It swung back, 
however, on touching the edge of the paste band, which was waiting for it, 
then over on the bridge with the first pair of legs, and after touching here 
with its mouth parts, it swung to the bare part again, then back to the 
bridged portion, then up, hesitatingly and nervously, and to the opposite side 
and doivn the latter — 4.55 p. m. The caterpillar got off the bridge, on bare ma- 
terial, soon after reaching the top of the band, but with no more than two pairs: 
of legs, and drew back quickly. 
Experiment B. 
(Day bright and warm.) 
ELEMENTS. 
1. Caterpillar. 
Fifth stage ; medium size for stage, fairly well advanced, pretty well ted, active. 
2. Odorous band (horizontal). 
Gipsy moth tree-banding material, as in Experiment A, except \ inch longer 
(6* inches long), with strong odor. Bridge moist and dark. 
3. Strip of stiff white paper 4 inches long and 1 inch wide. 
4. Molasses-flour band (horizontal). 
Molasses-flour mixture (molasses and white wheat flour), ^V inch high, 
1 inch wide, 3 inches long, on a strip of paper like and of same dimensions as 
3 ; of about the same consistency as the commercial sticky tree-banding material 
used in these experiments — somewhat more viscid than the flour paste used in 
Experiment A. 
TESTS. 
The caterpillar was placed on the sheet of paper 6 inches from and facing the 
odorous band (2) at 1.51 p. m. It halted 5* inches away and reared twice, 
repeated this movement A.\ inches away, and reared again two or three times 
at a distance of 4 inches. Then it turned slowly around and crawled away. 
rearing from time to time as it did so. 
The caterpillar was placed again as before. It hesitated and turned its bead 
somewhat from side to side at .the start, and stopped and reared three times 
about 4£ inches away; repeated this at a distance of 3-£ inches, and stopped and 
reared again when within about 2f inches. Finally it turned at a right angle 
and crawled away. 
When placed the third time the caterpillar hesitated and reared three dis- 
tinct times during the first 4 inches of its course toward the band, then turned 
out of its course somewhat and made its way, hesitatingly, to within \ inch. 
Here it stopped, reared, stretched forward, and brushed the bare part of the 
band with the first pair of legs and mouth parts. As it turned away the strip 
