METAMORPHOSIS 241 



be the places to look for them. In the early spring 

 they can be drawn ashore with a garden-rake; Inter 

 in the season a water-net, one with coarse cloth to allow 

 the water to pass freely through, must be used. In the 

 summer-time the vegetation would interfere with the 

 working of the rake. They will make their presence 

 known bv endeavoring to extricate themselves from the 



j CJ 



rakings. Such as are taken can be placed in a bucket 

 of water, to be carried home in safety. A water-pail, 

 half-full of water, with a few twigs or sticks extending 

 well above the surface of the water, is the kind of 

 place to keep these nymphs. The bucket should be 

 covered with mosquito netting, to prevent the escape 

 of any which may emerge. A good meal of mosquito 

 larva? (wigglers) once or twice a week will keep these 

 nymphs thriving. The bucket should be kept out- 

 doors, where the nymphs can get the benefit of the 

 sunlight. 



In collecting it will be well to chose only the oldest 

 nymphs for that season's study. The older ones have 

 longer wing-pads, which extend to about the middle of 

 the abdomen. These will emerge during the same 

 season. 



The points for the student to observe are: 



Method of feeding. For the purpose of answering 

 this question, several can be fed in a glass vessel filled 

 with water. 



Time of day of emergence. 



Actions during transformation to adult. I^ote es- 

 pecially the color of the insect just free from the 

 nymphal case, and the characteristic colors as they 

 appear. 

 -16 



