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Soon after the splitting of the black covering and the exposure 

 of the white maggot, a conspicuous change takes place in the 

 color of the latter, it becoming pink or reddish. The maggot, 

 v/hich has hitherto fed delicately without doing any vital injury 

 to its host, now proceeds to ingest the contents of the hopper in 

 an indiscriminate manner, and the change in color is clearly due 

 to this. If removed at this time from the hopper it is seen to 

 have very mobile and hard (chitinized) mouth parts, while the 

 thin and collapsed black covering still adheres some distance be- 

 hind the head. Growth is extremely rapid and the simultaneous 

 shrinking of the hopper, as its contents are absorbed by the para- 

 site, enhances this effect. Thus when the splitting of the black 

 covering takes place the hopper may be three or four times the 

 size of the parasite, when the latter is full fed the proportions 

 may be exactly reversed. The removal of the contents of the 

 hopper can be easily seen through parts of the cuticle. Gen- 

 erally early in the proceedings the soft contents of one or both 

 eyes and of the head are seen to be in rapid motion, like a boiling 

 fluid; suddenly all the pigment is removed from one eye (usually 

 the one on the opposite side to the parasite) and it becomes an 

 opaque white spot, then the other is often similarly destroyed, or 

 sometimes both more or less simultaneously. 



Finally the maggot, when it has finished feeding, withdraws 

 its head, and may then sometimes be seen busily engaged in 

 applying sticky matter from its mouth to its body. Its surface is 

 strongly adhesive and when it quits its prey, it is able (though 

 of course quite legless) to crawl freely over any surface, however 

 smooth. Soon it spins a neat white cocoon, from which it 

 emerges as an active winged insect in about i8 days. 



GENERAL HABITS OF DRYINIDAE. 



In Australia, the small apterous forms of the Gfliiiifof>!is typ:' 

 are essentially attached to the Jassidae and Fulgoridae, that feed 

 on grasses and low herbage, and this was also the case with the 

 many American species sent to Hawaii by Mr. Koebele. On 

 the other hand, the Hawaiian apterous species are essentially 

 arboreal, but it must be remembered that in Hawaii practically 

 all the native Homoptera are attached to forest trees, the few 

 that live on grasses being Jassids or Fulgorids almost certainly 

 introduced, the Hawaiian fauna being altogether of a special na- 

 ture. Echthrodclphax is also connected with grass-eating Ful- 

 gorids, or at least with those affecting low plants. The most 



