12 
still more effective than was supposed. In a foot-note the genus is fully- 
described and the original description of the species appears, as follows: 
Aphelinus mytilaspidis , n. sp.—Length one twenty-fifth of an inch, some 
individuals (if the same species) do not exceed one thirtieth. Pale lemon- 
yellow: mandibles reddish brown: ocelli coral-red; ovipositor reddish; a 
vacancy in the punctuation of the anterior wings, forming a narrow space 
or pathway across the basal half, extending inwards obliquely backwards 
from the stigma: cilia on the posterior margin of the hind wings longer 
than half the width of the wing. In the smaller individuals the fringe 
on both wings is proportionally longer, that on the hind wings being 
fully as long as the width of the wing. These may possibly be a distinct 
species." 
This genus contains the similar European species. A. flams. 
1871. 
Insects Injurious to Fruits. (Trans. Northern Ill. Hort. Soc., 1871, pp. 85-89.) 
The codling moth, plum curculio, and Colorado potato beetle were the 
most destructive insects of the past year. The first two pass the larval 
state within the fruit. Few natural enemies prey upon them because of 
the short time they are exposed to attack. The larva of the codling 
moth leaves the apple to .-pin a cocoon in some sheltered place, while 
that of the curculio enters the ground to transform. Both are more ac¬ 
tive by night than by day. and thus largely escape the bird'. There is 
only one efficient method for trapping each—for the codling moth, hay 
or rag bands placed around the tree trunks; and for the curculio, jarring 
the trees. Having put the bands on the trees about the first of June, 
they should be examined by the middle of July, and four or five times 
thereafter. Habits of moth described and presence in stored apples 
noted. 
Introduction. (Prairie Farmer, -. 1871, v. 12, p. -.) 
Speaking of the approach of spring and its influence on the motionless in¬ 
sect world, he notes our inability to cope successfully with noxious species, 
but urges upon farmers and horticulturists a study of their life histories 
and habits, and the importance of making and transmitting to the State 
Entomologist notes concerning observations. 
Oyster-Shell Bark Louse .— Beatli-Watcli .— Katydid's Eggs.—Notice to Corre¬ 
spondents. — Cankerworms. (Prairie Farmer, April 8, 1871, v. 42, p. —.; 
Oyster-Shell Bark Louse.—Received from Macon county, Ill. Found as 
far south as Mississippi. Is gradually diminishing in more northern 
localities owing to attacks of parasitic insects. The principal remedy is 
washing the trees with strong soap-suds about the first of June. That 
for trunk and branches may be made stronger than that for foliage. 
Death-Watch.—The ticking sound called the death-watch is produced 
by two insects, a Psocus and a species of Anobium. 
Katydid's Eggs.—Oval, flattened, slate-colored eggs, attached to twigs 
of apple and other trees. The insect is harmless. 
Cankerworms.—Stated in recent article that this insect attached many 
eggs to smaller branches and twigs. Subsequent examinations show that at 
least nine tenths of the eggs are placed on the inner side of the loose 
bark scales of the trunk and larger branches. Recommends scraping off 
and burning these bark scales after the eggs are laid in March, and be¬ 
fore they hatch. 
Cabinet for Insects.—Books on Insects.—Baspberry Borers.—Scales on the Olean¬ 
der. (Prairie Farmer, April 22, 1871, v. 42. p. -.) 
Raspberry Borers.—Received from Villa Ridge [Ill.] raspberry canes 
bored by Agrilus ruficollis. Eggs are supposed to be laid in midsummer, 
and the beetle appears about June. Cutting off and burning infested 
canes in winter or early spring is the only known remedy. 
