Scientific Work of Dr. C. H. Turner 13 



movements it can move in straight lines or curves, and 

 can scale vertical surfaces. He tells us further the de- 

 tails of its cocoon, and then with painstaking experiments 

 he works out the details of the insect's ability to "play 

 possum." Here he concludes that death-feigning poses 

 are not death attitudes, and that death feigning is not 

 instinctive, but an exaggerated prolongation of the pause 

 made by most animals when they are startled, and he 

 endorses James when he says, '*It is really no feigning 

 of death at all, and requires no self command. It is 

 simply terror paralysis which has become so useful as 

 to become hereditary." 



In 1922 Dr. Turner published a paper entitled "A 

 Week With a Mining Eumenid." He tells how the water- 

 carrying mining wasp digs her nest, paralyzes the cater- 

 pillars for her young, attaches her eg^ to the roof of the 

 chamber by a silken thread; how she is guided to and 

 from the nest by visual landmarks, and how, when he 

 made slight changes about the nests, the wasps returning 

 home with caterpillars had great difficulty in finding their 

 nests. 



Important work was also done on the conmion roach. 

 In a paper entitled ' ' Behavior of the Common Roach on 

 an Open Maze," he finds that a roach may be taught 

 within a day to run the maze. It learns by trial and 

 error method, yet in so doing it utilizes sense stimuli. 

 At times the insect acts as though experiencing the emo- 

 tion psychologists call will ; in its toilet-making activities 

 the roach very much resembles the cat, and in their be- 

 havior on the maze, roaches display marked individuality. 

 In another roach paper entitled "An Experimental In- 

 vestigation of an Apparent Reversal of the Responses to 

 Light in the Roach," he takes roaches, which are noc- 

 turnal animals and habitually shun the light, and trains 



