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 . lly worm. Selandria carycv. Norton. Order Hymenoptera ; family Tenthredinid^. On the under side of the leaves companies of saw-fly larvae covered with long densesnow-white wool standing up in flattened masses entirely concealing the green worm,eating the leaflets from the outer edge inward, often leaving nothing but the midribs. These remarkable objects occasionally, though rarely, appear on thebutternut in July. The worm presents th
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 . lly worm. Selandria carycv. Norton. Order Hymenoptera ; family Tenthredinid^. On the under side of the leaves companies of saw-fly larvae covered with long densesnow-white wool standing up in flattened masses entirely concealing the green worm,eating the leaflets from the outer edge inward, often leaving nothing but the midribs. These remarkable objects occasionally, though rarely, appear on thebutternut in July. The worm presents the appearance (as described in our Guide to the Study of In-sects, from which the followingdescription and figures are taken)of an animated white woolly or cot-tony mass nearly an inch long andtwo-thirds as high. The head ofthe larva is rounded, pale whitish,and covered with a snow-white pow-dery secretion, with prominentblack eyes. The body is cylindrical,with eight pairs of soft fleshy ab-dominal legs; the segments aretransversely wrinkled, pale pea-green, with a powdery secretion lowdown on the sides, but above and on the back arise long flattened masses. Fic. 127. This butternut woolly worm and thesaini; (U-privc»l of ita coat.—Froia Packard. INSECTS INJURIOUS TO THE BUTTERNUT. 339 of flocculent matter (exactly resembling that produced by the woolly plant-lice and other homopterous insects), forming an irregular dense cottonymass, reaching to a height equal to two-thirds the length of the worm,and concealing the head and tail. On the 27th and 28th of July thelarvne molted, leaving the cast skins on the leaf. They were then naked,a little thicker than before, of a pale-green color, and their bodies werecurled upon the leaf. The worms eat out the edge of the leaf. Sometime during August two cocoons were spun between the leaves, butI flid not succeed in raising the saw-flies. On describing the larviein a letter to Mr. E. Norton, our best authority on this hymenopterousfamily
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