THE STATE ENTOMOLOGIST. 



147 



Remedies. — Dr. Fitch has described two parasites, which attack 

 Ihis caterpillar, and I am acquainted with seven others, making in all 

 nine distinct parasites, which prey upon this species. It was my in- 

 tention to have described and figured some of these parasites, but the 

 time in which this Report must be ready for the Public Printer for- 

 bids my doing so, the present year, and it suffices to say that in col- 

 lecting the cocoons in the winter in order to destroy them, none but 

 those which have the egg-masses on them should he taken, as all the 

 others, either contain, the empty male chrysalis or else some friendly 

 parasite! From the fact that the female never travels beyond her 

 -cocoon, it becomes obvious that, since the insect can only travel in 

 the caterpillar state, it would require over a century for it to spread 

 even a hundred miles. Hence we may rightly conclude that it has 

 been introduced to different parts of the country in the egg-state on 

 youRg imported trees. How essential it is then to examine every 

 tree in planting out a young orchard, and how easy it is with the 

 proper precautions to forever keep an orchard free from its destruc- 

 tive work. As already stated, the young worms let themselves down 

 r upon slightly jarring the tree, and though after the third moult they 

 lose this habit to a great extent, yet they may always be brought 

 down by a good thorough shake, and where they have once invaded 

 an orchard, this will be found the most feasible mode of killing them ; 

 though prevention by destroying the egg-masses in the winter when 

 they are easily discerned, is infinitely the best and surest remedy 

 against its attacks. 



THE BAG-WORM, alias BASKET^WORM, alias DROP-WORM- 

 Thyridopteryx ephemer&formis, Hawortm 



/Lepidoptera, Psychicke. 

 [Fig. 84] 



Our shade and ornamental trees are often "defoliated by various 

 tfesects, -and I will give brief accounts of three which have attracted 



