IN PRODUCTION. 
The following paper contains an account of all the species 
of butterflies occurring in Maine, so far as known to me. If 
there are other species within our limits, they must be rare, or 
very local in their distribution; and if any should hereafter 
be found in the State, which are not here described, I shall 
be very glad to know of the fact, and to see specimens of 
them. Weare still ignorant of the insect fauna of certain 
parts of the State, yet it is hardly probable that many species - 
of butterflies will be added to the list herein described. 
Chionobas semidea Say, and Argynnis montinus Scud. 
occur on the White Mountains in New Hampshire, and may 
yet be discovered on Mt. Katahdin when that region is fully 
explored by entomologists. 
Quite a number of the butterflies feed on plants which are 
of no special value to our people, but those which are destruc- 
tive to our more valuable plants should be well known in all 
their stages, and the best means of destroying them should 
be understood. Ihave therefore given all the facts known 
to me, which can be of value in holding the injurious insects 
in check. 
It should be a part of the education of a farmer, to dis- 
cover his friends and enemies among the insect tribes, and 
to do this, there is no better way than to raise those which 
trouble his crops, carrying them through all their transforma- 
tions, in order to enable him to recognize them in any stage 
of their existence, and to discover the most vulnerable stage 
in their lives, or the one in which they may be most easily 
destroyed. 
