— 20 — 
Remedies -There are several remedies that may be 
successfully used against this insect. White hellebore lightly 
dusted over the foliage in the evening, or applied in a 
watery spray in the proportion of an ounce to three gallons, 
is probably the best. Paris green or London purple dusted 
or sprayed upon the foliage will accomplish the same result. 
Air-slaked lime or strong wood ashes have often been rec- 
ommended and are probably of some use. Even fine road 
dust has been recommended as all sufficient for the destruc- 
tion of the slim}^ larvae of this saw-fly, but I am inclined to 
think that the last of these remedies, at least, is of little use, 
and I have dusted lime freely upon the slugs wdthout any 
apparent harm to them. Pyrethrum, or Persian Insect Pow- 
der, dusted over the slugs will kill all that it comes in con- 
tact with. 
I his slug also attacks the foliage of plum and cherry 
trees. 
THE PEAR LEAF-BLISTER. {Plnjtojdus Scheuten.) 
d'his disease is indicated by small black spots appear- 
ing upon pear leaves, sometimes so numerous as to run to- 
gether and involve a great portion of the leaf. Before turn- 
ing black the spots are green like the rest of the leaf. An 
examination of the spots will show thut they are slightly 
thickened portions and each one is the habitation of a large 
number of very minute parasites. 
Remedies — dflie parasites spend the winter, chiefly, un- 
der bud-scales upon the trees, and may be killed during 
winter or early spring, when the trees are dormant, by a 
spray of kerosene emulsion in which the kerosene is one- 
fifth of the mixture. 
Other insects mentioned in this paper that are some- 
times found attacking the pear, are: Codling Moth, Red 
Spider, Brown Mite, PTuit-tree Leaf-roller, d'ent Caterpil- 
lar, Flat-headed Borer, P'all Webworm, Buffalo d'ree-llop- 
per, San lose Scale and Putnam’s Scale. 
PLUM TREE ENEMIES. 
THE PLUM GOUGE R. {Coccofurus priinicic/n Walsh.) ’ 
'Phis insect is often mistaken for the Plum Curculio, 
mentioned below, which does not occur, in L' >lorado as yet. 
d'he Gouger is a native of the Western Unii^ d States, where 
it has fed from time immemorial upon native plums and it 
