﻿4 BULLETIN 1142, U. S. DEPARTMENT OF AGRICULTURE. 



Exi'KKl.MKNT A. 



i Day dull and rather cool.) 



ELEMENTS. 



Caterpillar. 



Fourth stage: not very far advanced, rather small for the stage. 



Bands (horizontal). 10 



1. Flour paste band made of wheat flour and water, about fa inch high, 1$ 

 inches wide, 5* inches long. 2. Solid band made of flour and water (hardened), 

 i inch high, 1$ inches wide, 6 inches long, sides practically vertical. 3. Solid band 

 made of flour and coal-tar neutral oil (at rate of 1$ ounces flour and §+ ounce 

 oil), J inch high, lh inches wide, 5£ inches long. 4. Solid band made of flour 

 and coal-tar neutral oil (at rate of 2 ounces flour and 1+ ounce oil), fa inch 

 high, lfa inches wide, 4£ inches long, sides vertical. 5. Solid band made of 

 flour and coal-tar neutral oil (at rate of 2 ounces flour and 1* ounces oil), 

 about I inch high. It 1 ,! inches wide, and 5£ inches long, sides vertical. 



All on sheets of white paper. 



TESTS. 



Band 1: 9.25 a. m. 



The caterpillar was placed live distinct times on the sheet of paper 6 inches 

 from and facing the band, and during about one-halt* hour made 1G attempts to 

 cross the band, but backed out or turned away each time it came more or less 

 in contact with the band. 



Band 2: 9.55 a. m. 



The caterpillar was placed twice 6 inches from the band, and crossed each 

 time without very much hesitation. 



Band 3, with marked coal-tar neutral oil odor, somewhat damp to touch: 

 10.25 a. m. 



The caterpillar was placed 6 inches from and facing the hand. It approached 

 within 2 inches of the band, then turned at an angle and went around the end of 

 the band. 



The caterpillar was placed again in the same position. It stopped short and 

 turned somewhat at an angle when about 2 inches from the band but soon 

 resumed a straight course, swims upon the band on reaching it. and crawled 

 across. 



The caterpillar was placed a third time. It stopped short and turned away 

 from the band when within about £ inch of it and after crawling along it for 

 a short distance, about I inch away from it, it veered abruptly and crawled 

 away. 



Placed a fourth time, the caterpillar stopped and swung its head three times 

 when about \ inch from the band, then continued, and on reaching the band 

 (at a slight angle) it swung upon it with the first pair of legs, but after linger- 

 ing on the band 2 or 3 seconds it swung off and crawled away. 



Band 4, with marked odor, somewhat damp to touch : 11 a. m. 



The caterpillar was placed 6 inches from and facing the band. It paused when 

 about 4i inches away and again at a distance of about i inch and swung its 

 head two or three times ; stretched forward when about J inch away and ap- 

 parently came in contact with the band : then turned and crawled away. 



The caterpillar was placed again. It paused when about 2£ inches away 

 and again at about i inch, then stretched toward the band and after some 

 hesitation swung upon it (with the first pair of legs) and hesitatingly crawled 

 up and across. 



When placed a third time, the caterpillar got to within about | inch of the 

 band, swung its head several times, turned and crawled away. 



Placed for the fourth time, the caterpillar approached within about fa inch 

 of the band and turned away, but soon swung back, and after getting upon 

 the band with the first pair of legs, swung down and crawled away. 



Being placed for the fifth time, the caterp'llar stopped about i inch from 

 the band and swung its head two or three times, then resumed, and on reach- 

 ing the band presently at a slight angle, it swung on with the first pair of legs, 



"'The gipsy moth tree-banding material band usod on trees in the control work against 

 the gipsy moth is }| inch wide and 3 7 z inch thick, and is rectangular in form (2, p. 10). 



