The Capture, Preparation, and Preservation of Specimens 
an outbuilding, all the openings leading from which should be 
carefully closed so as to prevent the escape of the caterpillars. 
How to Find Caterpillars. — Many species of caterpillars are not 
hard to discover; they are more or less conspicuous objects, and 
strike the eye. Some species conceal themselves by weaving 
together the leaves of the plant on which they feed, or by bending 
Fig. 50. — Breeding-cage: a, base, battened at^to 
prevent warping; b, removable body of cage, in¬ 
closing zinc pan, /, f, containing jar for plant, d, 
and filled with five inches of soil, e ; c, removable 
top, covered with wire gauze. The doors and 
sides are of glass (Riley). 
a single leaf into a curved receptacle in which they lie hidden. 
Others conceal themselves during the daytime about the roots of 
trees or under bark or stones, only emerging in the night-time to 
feed upon the foliage. The collector will carefully search for 
these. The presence of caterpillars is generally indicated by the 
ravages which they have committed upon the foliage. By care¬ 
fully scanning a branch the collector will observe that the leaves 
