182 
JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
eyed Lace-wing Fly, another most useful insect, both as a Fly 
and also in the larval stage (fig. 27). Its habit is to lie almost 
flat to the leaf and spread its legs out like an alligator—in fact 
its waggling movement much resembles that of the alligator— 
and with its large curved jaws it snips up a large number of 
Fig. 25. 
Green Flies. When full grown it is barely half an inch long, and 
is of a greenish colour ; its silken cocoon in which it changes to 
a chrysalis is about the size and form of a Sweet Pea, and is 
generally hidden away most successfully. Fig. 28 represents 
Hemerobius, one of the Lace-wings. 
The old saying “ Give a dog a bad name and hang him ” 
might well be applied to the much maligned Devil’s Coach- 
