National Geographic : 1911 Apr
THE GYPSY MOTH (Porthetriadispar) Fig. I . Male moth. Fig. 2. Female moth. Fig 3. Male pupa. Fig. 4 . Female pupa. Fig. 5 . Egg cluster. Fig. 6. Caterpillars; the largest are less than half grown. The gypsy moth is one of the worst forest pests of Europe. It was accidentally intro duced into Massachusetts 40 years ago, and has now spread to the adjacent States of Connecticut, Rhode Island, New Hampshire, and Maine. It has been recently brought into this country on imported stock and taken to such widely isolated points as Louisiana and Ohio. There is grave risk of its becoming distributed over the entire United States. It has already cost in New England, in mere efforts at control, a good many millions of dollars, and should it become widespread in the United States, damage from it would be beyond calculation. Every effort should be made to prevent a further introduction of this and other equally serious forest pests from Europe and Asia.