. A manual of dangerous insects likely to be introduced in the United States through importations. sativum).White ash (see Schizomeria ovata).Whitethorn (see Mespihis spp.). Whortleberry ( Vaccinium spp.) 20 Wild fruits 112,116 Willow (see Salix spp.). Yams 122 Yew (see Taxus spp.). Zea mays (corn, maize) 6,84, 85,122,123,135,142,1S9,197,200,203,208,214 o LIBRARY OF CONGRESS 0 002 831407 3 \. .> Different Stages of the Gipsy Moth (Porthetria dispar). Egg mass on center of twig; female moth ovipositing just lielow: female moth below, at left,enlarged: male moth, somewhat reduced, immedi
. A manual of dangerous insects likely to be introduced in the United States through importations. sativum).White ash (see Schizomeria ovata).Whitethorn (see Mespihis spp.). Whortleberry ( Vaccinium spp.) 20 Wild fruits 112,116 Willow (see Salix spp.). Yams 122 Yew (see Taxus spp.). Zea mays (corn, maize) 6,84, 85,122,123,135,142,1S9,197,200,203,208,214 o LIBRARY OF CONGRESS 0 002 831407 3 \. .> Different Stages of the Gipsy Moth (Porthetria dispar). Egg mass on center of twig; female moth ovipositing just lielow: female moth below, at left,enlarged: male moth, somewhat reduced, immediately above- female moth immediately above,somewhat reduced: male moth with wings folded in upper left: male chrysalis at right of this:female chrysalis again at right; larva at center. (Howard and Fiske.) Issued Aug. 15, 1917. U. S. DEPARTMENT OF AGRICULTURE, OFFICE OF THE SECRETARY. CONTRIBUTION FROM THE BUREAU OF ENTOMOLOGY, L. O. HOWARD, CHIEF, IN COLLABORATION WITH THE FEDERAL HORTICULTURAL BOARD, C. L. MARLATT, CHAIRMAN. A MANUAL OF DANGEROUS INSECTS LIKELY TO BE INTRODUCED IN THE UNITED STATES THROUGH IMPORTATIONS. EDITED BY W. DWIGHT PIERCE, Entomologist, Southern Field Crop Insect
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