440 C. H. TURNER 



MEMORY AND ASSOCIATION 



Beutel-Reepen (6) believes that bees have a memory picture 

 of the environment which guides them home. 



Fabre (23) insists that it is not memory, but, a special sense 

 which guides insects home. 



Hudson (39) gives a short note on the memory of a Pompilid 

 wasp. 



Lovell (51) says; ' Experiment and studies of the honey- 

 plants show that honey-bees learn from observation and are 

 guided by the memory of past experience. Flowers rich in acces- 

 sible food supplies receive numerous visits, but if for any reason 

 the flow of nectar suddenly ceases the bees immediately discon- 

 tinue their visits." 



See Lovell under visual sensations. 



TECHNIQUE 



O'Kane (66) describes the construction of an outdoor insec- 

 tary, with a conservatory roof, which has screen sides for summer 

 and glass sides for winter. 



Shelford (8) discusses the importance of using atommeters in 

 studying insect behavior. 



Wolff (105) discusses methods of investigating the temperature 

 reactions of butterflies. 



Mrs. Comstock (17) redescribes a method, well known to 

 students of insects, of keeping crickets in large lamp chimmeys 

 resting in flower pots. 



Phillips and Demuth (70) describe a method of investigating 

 bee hives by means of electrical thermometers. 



Draper (20) has devised a convenient live box for studying 

 insects under the lowest powers of the microscope. A piece 

 of glass tubing one-third of an inch deep and two-thirds of an 

 inch in diameter is cemented to a standard microscopic slide. 

 A circular piece of glass, of larger diameter than the cell, serves 

 as a cover. Near the circumference of this cover and equi- 

 spaced, three pins are attached to the underside. The collar 

 by which each pin is attached to the cover prevents it from 

 touching the top of the cell and thus insures ventilation. A 

 false bottom permits regulation of the depth of the cell. 



Baumberger (4) describes a convenient net for securing large 

 quantities of live insects. The net is constructed in the follow- 



