54 STORRS AGRICULTURAL EXPERIMENT STATION 
It is possible that with the influence of insect parasites and 
unfavorable weather conditions this insect will never become a 
serious pest, but if it re-occurs in such numbers as during the 
past season, it must be reckoned with by the orchardist. 
As the insect has been found on the Haw, or Thorn Apple, 
care should be exercised in preventing the growth of these 
trees in the neighborhood of the orchard. 
HOW DISTRIBUTED. 
From the fact that certain sections of an orchard may be 
seriously infested while in other sections the work of the in- 
sect is scarcely visible, we believe that the tiny moths do not 
fly long distances. The blowing of the leaves by the wind, 
however, will tend to distribute the insect throughout an or- 
chard or even from one orchard to another. 
Fresh infestations are undoubtedly brought about by nursery 
stock. Messrs. Frey and Boll found the insect in Germany 
mining the leaves of apple trees imported from America. It 
would therefore seem advisable to destroy any leaves which 
may be found attached to the trees or in the packages when 
purchasing stock from a nursery. 
ACKNOWLEDGEMENT. 
The writer is indebted to Mr. G. H. Lamson, Instructor in 
Entomology, Geology and Ornithoiogy, Connecticut Agricul- 
tural College, for many valuable suggestions and for the draw- 
ings which appear in this bulletin (Figs. 13, 14, 15 and 16). 
BIBLIOGRAPHY. 
1860 Clemens, Proc. Acad. Nat. Sci. Phila., XII., p. 208 
(brief descriptions). 
1871 Chambers, Can. Ent., III., p. 208 (Food BEETS 
1872 Clemens, Tin. No. kin, pp. 141-142. 
