Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . e. Thelength of one forewing is .18, and the length of the body is .13 inch. The cocoon is white, tough, dense, slender cylindrical, and .20 inch in length. Itis fastened by one side to the leaf, and diflfers from that of the apple Bucculatrix innot being ribbed longitudinally. A minute, beautifully brilliant green ichneumon(Chalcis) fly seems to attack in considerable numbers the chrysalids of this insect, asnearly half of those rea
Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . e. Thelength of one forewing is .18, and the length of the body is .13 inch. The cocoon is white, tough, dense, slender cylindrical, and .20 inch in length. Itis fastened by one side to the leaf, and diflfers from that of the apple Bucculatrix innot being ribbed longitudinally. A minute, beautifully brilliant green ichneumon(Chalcis) fly seems to attack in considerable numbers the chrysalids of this insect, asnearly half of those reared by me turned out one of these parasites. It is a speciesof a genus allied to Eulophus, having the antennae pectinated, the terminal jointsthrowing off five long branches. It differs, however, from Eulophus among othercharacters by having a short, thick body, a small, conical abdomen, and short, thickantennae. The forewings are broad, triangular. We noticed these beautiful moths again in 1881, at Brunswick, flyingabout a cedar hedge in considerable numbers from the middle of early in August. 2. The bag-worm. Thyridopteryx ephemerwformis, c Fig. 305.—The Bag-worm, (Thyridopteryx ephemercejormis Haw.)a. Larva, fully grown; 6, male chrysalis; c, female moth ; d, malemoth ; e, bag containing female chrysalis, with eggs ; /, fully grownlarva carrying its bag; g, young worms in their cases. The general abundance of this pest upon cedars and some other treesin southern Illinois calls for special mention. The small conical bags, CEDAR WORMS. 919 attached to the twigs of the tree, can not be mistaken for anything of these contain the eggs, which remain throughout the winterand hatch in the following May. They may consequently be removedand destroyed by hand in the winter and spring, or the trees may beprotected by spraying with Paris green or other similar poison in Juneor July, when the worms are eating the leaves. (Forbes First ReportIns. Illinois.) 3.
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