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DWIGHT E. MINNICH 



in the laboratory. Such individuals rarely survived the lack of 

 food for more than a day or so. Yet it was not an m^requen 

 occurrence to observe one of these starved animals, so weak that it 

 was barely able to creep, slowly emerging from a hidden corner 

 in a final struggle toward the light. _ 



Nevertheless, bees were discovered which m a few mstances 

 failed to exhibit the usual positive reaction to directive hght. 

 Such|cases, however, are not to be construed as a total absence 



? 



Fig. 6 Three successive records of a normal bee in directive light, showing a 

 failure to orient in two cases. 



of phototropism, but rather its momentary suppression by other 

 factors of behavior. This is well illustrated by the following 

 example. Seven cages of bees were prepared from the stock in 

 the observation hive, Oct. 30, at 2:45 p.m. When tested about 

 an hour later in the directive light area, six of the seven animals 

 exhibited the usual positive response. One animal, however, gave 

 the records reproduced in figure 6. 



This bee when given its first trial at 4: 06 (fig. &, 1) did not ori- 

 ent toward the light source. Instead it pursued a devious course 



