CADDIS WORM. 157 
‘‘We do not know of any preparation for the destruction of the 
worms without injury to the plants. When Shrimps are troublesome, 
quick-lime is very efficacious, and put into the incoming water kills 
the Shrimps without detriment to the Cresses.”—(R. C.) 
Our chief natural helpers against over-presence of Caddis Worms 
appear to be fish of various kinds. In Isaac Walton’s long notes on 
the excellency of these grubs as baits, he mentions more especially 
three kinds ‘‘ which are good indeed to take any kind of fish with float 
or otherwise.” * From his descriptions of the ‘ cases,’’ it is obvious 
that it is the larve of the Trichoptera (viz. the Caddis Worms) which 
he refers to. But perhaps, relatively to the startling dimensions of 
one kind noted as about an inch long, ‘‘and as big about as the 
compass of a twopence,”’ it may be well to mention that this measure is 
of a silver not a copper coin. I find on reference that ‘‘no authorized 
coinage of copper was struck till 1672, when halfpence and farthings 
of that metal were first made public money. . . . Pieces of a penny 
and twopence in copper were coined in the reign of George the Third.” 
As Walton’s five editions of his ‘Complete Angler’ were published 
respectively in 1653, 1655, 1664, 1668, and 1676, it is manifestly a 
silver twopence to which he refers, and a word as to the real size of 
the ‘‘ case” may be of service. 
Perhaps also it should be added that the term “ May Flies’”’ is not 
correctly applied to the Water Moths, or Caddis Flies, which develop 
from the Caddis Worms. The true ‘‘ May Flies,” or Ephemeride, 
with very few exceptions, only live as complete insects for a short 
time, or a few hours, and may be distinguished by their membranous 
wings, of which the foremost pair are the largest, and much netted 
with veins; and also by presence of two or three long and slender 
hairs, forming a tail-like appendage at the end of the body. These 
small flies are best known in the great flights in which they assemble 
towards afternoon or evening over or near water, where they afford 
excellent food to fish, and are much used as baits, real or artificial, 
but are quite distinct, entomologically, from the Water Moths of the 
Caddis Worms. 
* See Walton’s ‘Complete Angler,’ 1808, pp. 303, 304. 
