12 
The suggestion made by Tasehenberg is also worthy of note, 
namely, that since only the less vigorous trees are successfully 
attacked,—the more thrifty ones pouring out such floods of sap 
when pierced as either to drive away the beetles or to prevent the 
development of the young,—it is possible that trees already in¬ 
fested to some small extent ma 3 r be sustained by care and fer¬ 
tilization. Probably the best-kept orchards and most vigorous 
trees will be least likely to suffer from this borer. 
«/ 
AMERICAN LITERATURE. 
1878. I 
Le Conte, J. L.—Description of New Species [of Michigan Coleop- 
tera]. (Proc. Am. Philos. Soc., 1878, v. 17, p. 626.) 
“This is a. suitable opportunity to notice the introduction of 
this European species [Scolytus rugulosus ] into the United 
States. 1 have received specimens from Elmira, N. Y., where it 
attacks peach-trees. According to Ratzeburg it is rare in Ger¬ 
many, but is found upon plum and apple trees.” 
1880. 
Riley, C. Y.—Minute Borers in Cherry, Peach, and Plum trees. 
(Am. Ent., 1880, v. 3, p. 298.) 
Receives specimens of a beetle which has for several years de¬ 
stroyed all cherry, peach, and plum trees set out on a particu¬ 
lar lot at Fairhaven, N. J. Said to bore in the trees little holes, 
which fill with gum, the trees soon dying. 
Also from Coopersburg. Penn., receives specimens of a small 
beetle said to have so profusely stung a young cherry-tree, trunk 
and branches, that it is not expected to recover. The same 
beetle in both instances ,—Scolytus rugulosus, Ratz. It is a na¬ 
tive of Europe, probably introduced here at a recent date, but 
it lias spread rapidly and does more damage here than there. 
Received the insect some years ago from Hillsborough, Mo., 
and Williamsport, Md., attacking also the peach; and it occurs 
in the District of Columbia. 
1882. 
Penhallow, D.P.—Diseases of Plants. Peach Yellows. (Hough¬ 
ton Farm Experiment Dept. [Publications], Ser. 3, No. 2, 
p. 38.) 
Under head of injuries, speaks of the possible connection of in¬ 
juries by Scolytus rugulosus with the peach yellows. This in¬ 
sect injured several trees near Houghton Farm during above 
year. So far as observations go, beetles may penetrate thick 
bark to the wood, but no larvae and no lateral channels were 
found except in thinner and more tender bark of younger trees. 
