. Bulletin. Animals -- United States; Birds -- United States. ROSEBREAST VS. HAIRY CATERPILLARS. 51. Fig. 27.âFffU cankerworm {Alsophila pometarifi). (From Riley, Bureau of Entomology.) The dreaded army Avorni {Heliophila Kuipiivcta^ fig. 28), which sometimes appears in myriads and devastate fields of grain and grass, also is the prey of this beautiful grosbeak. A bird from Illinois in July had captured G of these destructive caterpillars. The tent-caterpillars are another group of noxious lepidopterous insects, which are common in many parts of the United States. They greatly damage orchards,
. Bulletin. Animals -- United States; Birds -- United States. ROSEBREAST VS. HAIRY CATERPILLARS. 51. Fig. 27.âFffU cankerworm {Alsophila pometarifi). (From Riley, Bureau of Entomology.) The dreaded army Avorni {Heliophila Kuipiivcta^ fig. 28), which sometimes appears in myriads and devastate fields of grain and grass, also is the prey of this beautiful grosbeak. A bird from Illinois in July had captured G of these destructive caterpillars. The tent-caterpillars are another group of noxious lepidopterous insects, which are common in many parts of the United States. They greatly damage orchards, as well as shade and w^oodland trees. E. H. Forbush " is authority for the state- ment that the rose-breasted gros- beak preys upon the orchard tent- caterpillar {Malacosoma rnnericana^ fig. 29), and Prof. C. M. Weed'^ reports that the bird devours moths, larvae, and pupae of the forest tent-caterpillar (J/, disstria). Two other insects of this order, which are usually thought of together and which indeed are closely related, are the gipsy moth (fig. 30) and the brown-tailed moth (fig. 31). Mere mention of their names calls to mind the enormous damage done by them in the State of Massachusetts, and of the costly efforts being made to stamp out these disastrous invaders from across the sea. Birds have proved of serv- ice as allies in this struggle, and the present species is by no means least in importance among them. In the original report ^ on the gipsy moth, as well as in later publications,'^ the rosebreast is listed among the species de- vouring the larvse, Avhile in regard to the brown-tail moth Messrs. Mosher and Kirkland report'' that '"' a rose-breasted grosbeak ate .57 caterpillars in twenty ; Fig. 28.âArmy worm \ . â¢' . (Heiiophihi iinipuncta,. 1 his species cats hairv and spmy caterpillars (From riiittpnden, i?u- .^^ readily as smooth ones, and the idea so often reau of Fntoraology.) " i i ⢠⢠rt> â advanced that such hairy
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