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THE AMEBIC AN NATURALIST [Vol. XL VIII 



and crawling downward. This was not always the case, 

 however. 



Of other specimens tried, some showed positive geo- 

 tropism more definitely, some less definitely than the one 

 described. None showed a negative reaction in the ma- 

 jority of cases. 



Anaphothrips striatus 



Light. Exps. 5 and 7. — Adults of this species were 

 shaken out on a sheet of white paper near a window, and 

 the course of their crawling was plotted as accurately as 

 possible in my notes. Some individuals were decidedly 

 negative to light, crawling directly away from the window 

 every time they were tried, regardless of the direction in 

 which they happened to be headed when they touched the 

 paper. Others were indifferent to light, crawling in vari- 

 ous directions. Most of the males used were decidedly 

 negative to light, females usually indifferent. 



Exp. 10. — Females taken from the exposed portions of 

 leaves of Spartina michauxiana, and tested as above, 

 were found in nearly every case to be indifferent to light. 

 Females from the curled young leaves of the same plants 

 were as a rule negative to light. 



Exp. 6. — Larvae were usually found indifferent to light, 

 regardless of whether they came from exposed or con- 

 cealed situations. 



Exp. 15. — A single larva taken from the exposed part 

 of a leaf, when placed in a glass tube one end of which 

 was directed toward the window, crawled steadily toward 

 the window. When the position of the tube was reversed, 

 the larva at once reversed its direction. The tube was 

 then placed in a black sleeve to exclude the light, and kept 

 there for an hour. When it was removed, the larva 

 showed for some minutes a decidedly negative reaction to 

 light. Later, however, its behavior became indefinite, 

 and soon became markedly positive. Darkness had ap- 

 parently temporarily reversed its reaction. 



Contact. Exp. 22.— A female of this species which was 



