﻿8 I'.ii.i.i.rix 1142, r. s. in :p \i;tm i:\ i OF AGRICULTURE. 



2. Odorous band (horizontal). 



Gipsy moth tree-banding material, l| Inches bigh, -I baches wide, <> inches 

 long, sides vertical, on a sheet of white paper. Band br'dged about iii middle 

 with strip of cheesecloth (medium mesh, 29 by 34 threads per square inch) 

 1 inch wide; cloth fitting closely to hand at all poin s and extending from 

 base of one side to base of opposite side, odor of hand stronff t 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." 



4. Paste band (horizontal). 



Flour paste hand made of white wheat tiour and water, -£ e to A inch high, 1 

 inch wide. .". inches long, on a strip of paper like and of the same dimensions 



as:;. 



TESTS. 



The caterpillar was placed ou the paper c> inches from and facing the odorous 

 hand (2) at 2.43 p. m. It made straight for the hand for about 2 inch.es. then 

 turned at a diagonal, and con inning in the same general direction went around 

 the end of the hand. It approached within 2 inches of the hand. 



Second placing (as before) : The caterpillar turned out of a straight course 

 3 inches from the band, and when within J inch of it veered away still more 

 (now parallel (o the hand), and, crawling along the hand at that distance — ■ 

 its longer hairs brushing the hand — it 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 hand and went around the end. It approached within; 1 inch of the 

 band. 



Sixth placing: The caterpillar turned out of a straight Pourse abou' 4 inches 

 from the band, peered 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 i 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 ou the adjoining side of the bridge, and 

 crawled away. 



Eighth placing: The caterpillar paused about A inch from tlie hand, 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 hand again and af er touching it with its 

 mouth parts turned away nervously. Soon after this it approached close to 

 the hand a third time, but turned away apparently wi.hout touching it; then 

 crawled away. 



N'nth placing: The caterpillar began to turn out of a straight course about 

 1 inch from. the band hut 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 hi the way of the caterpillar with the shorter axis either vertic-il 

 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 1| 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 I 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 hand that forced the cater- 

 pillar on the bridged odorous band rather than the mere object or obstacle placed in its 

 way. 



