WATER-LIZARDS AND THEIR ILK. 107 



sort of drowning-place for other little insects, as I 

 found a small winged creature, perhaps a winged 

 aphis, dead in the froth. 



I had obtained for my larva a shoot of what 

 I supposed was a cultivated blackberry, for I 

 thought that he would not know the difference 

 between the taste of that and the taste of the wild 

 variety. My supposed blackberry shoot, how- 

 ever, was finally discovered to be a raspberry 

 one. After I had wiped the froth from him as 

 well as I could, so that, while not being exactly 

 dry, he had not much moisture on him, he tum- 

 bled into the cup of water in which I had placed 

 the shoot to keep it fresh. He descended to the 

 bottom of the cup, but my rescuing finger was 

 after him, and he clutched it and was saved. 

 However, I did not wipe him dry after his invol- 

 untary plunge. 



I put him on the shoot and he speedily began 

 work. With the constant bending of the hinder 

 portion of the abdomen, little bubble after little 

 bubble collected under him. Within nine or ten 

 minutes he had quite a number, enough to make 

 a small mountain of froth. Still the whole upper 

 surface of his body was uncovered. 



In twenty-five minutes from the time of start- 

 ing, the froth had mounted so high that it began 

 to touch his back. Some of the time he kept his 

 head down to the " blackberry " shoot, as though 

 he might be drawing in juice, as these creatures 



