A word more about the Seventeen-year Cicada. Professor Orton writes us from Yellow Springs, Ohio, that this insect has done great damage to the apple, peach, and quince trees, and is shortening the fruit crop very materially. By boring into twigs bearing fruit, the branches break and the fruit goes with them. "Many orchards have lost full two years' growth. Though the plum and cherry trees seemed exempt, they attacked the grape, blackberry, raspberry, elm (white and slippery), maple, white ash, willow, catalpa, honey-locust and wild rose. We have traces of the Cicada this year from Columbus, Ohio, to St. Louis. Washington and Philadelphia have also had a visitation." [Illustration: 265. Hop Vine Moth and Young.] [Illustration: 266. Humble Bee Parasite.] We figure the Hop-vine moth and the larva (Fig. 265) which abound on hops the last of summer. Also, the Ilythia colonella (Fig. 266, a, pupa), known in England to be a parasite of the Humble bee. We have frequently met with it here, though not in Humble bees' nests. The larvae feed directly upon the young bees, according to Curtis (Farm Insects). The Spindle-worm moth (Gortyna zeae), whose caterpillar lives in the stalks of Indian corn, and also in dahlias, flies this month. The withering of the leaves when the corn is young, shows the presence of this pest. The beetles of various cylindrical Bark borers and Blight beetles (Tomicus and Scolytus) appear again this month. During this month the Tree cricket (Oecanthus niveus, Fig. 267) lays its eggs in the branches of peach trees. It will also eat tobacco leaves. [Illustration: 267. Tree Cricket.] We figure (268) the moth of Ennomos subsignaria, the larva of which is so injurious to shade trees in New York City. It is a widely diffused species, occurring probably throughout the Northern States. We have taken the moth in Northern Maine. We have received from Mr. W. V. Andrews the supposed larvae of this moth. They are "loopers," that is, they walk with a looping gait, as if measuring off the ground they walk over, whence the name "Geometers," more usually applied to them. They are rather stout, brown, and roughened like a twig of the tree they inhabit, with an unusually large rust-red head, and red prop-legs, while the tip of the body is also red. They are a little over an inch long. [Illustration: 268. Ennomos subsignaria.] _The Insects of September._ Few new insects make their first appearance for the season during this month. Most of the species which abound in the early part of the month are the August forms, which live until they are killed by the frosts late in the month. From this cause there is towards the end of the month a very sensible diminution of the number of insects.