. Bulletin of the Department of Agriculture. Agriculture; Agriculture. JIU^'^^U Washington, D. C, PROFESSIONAL PAPER March 13, 1922 APANTELES MELANOSCELUS, AN IMPORTED PARASITE OF THE GIPSY MOTH. By S. S. Ckossman,^ Entomological Assistant, Oipsy Moth and Brown-Tail Moth Investigations. CONTENTS. Page. Introduction 1 Part I.—Description and life his- tory 2 History 2 Distribution in Europe 3 Description of species 3 Methods used in biological work- 4 Life history 5 Seasonal history 11 Feeding of parasitized larvffi versus nonparasitized larvs 12 Longevity experiments 12 Hosts of A. melano
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. JIU^'^^U Washington, D. C, PROFESSIONAL PAPER March 13, 1922 APANTELES MELANOSCELUS, AN IMPORTED PARASITE OF THE GIPSY MOTH. By S. S. Ckossman,^ Entomological Assistant, Oipsy Moth and Brown-Tail Moth Investigations. CONTENTS. Page. Introduction 1 Part I.—Description and life his- tory 2 History 2 Distribution in Europe 3 Description of species 3 Methods used in biological work- 4 Life history 5 Seasonal history 11 Feeding of parasitized larvffi versus nonparasitized larvs 12 Longevity experiments 12 Hosts of A. melanosceliis 12 Part II.—Introduction and estab- lishment 14 European work 14 Comparison of seasonal history in Sicily and New England Page. Part II.—Introduction and estab- lishment—Continued. Abundance of A. melanosceliis in Sicily 15 Secondary parasitism in Sicily_ 16 Colonization in New England-_ 16 Methods used to obtain material for colonization 18 Success of colonies and distribu- tion of A. melanosceliis 21 Dispersion 22 Secondary parasitism 23 The value of A. melanosceliis as a gipsy moth parasite 23 Abundance of A. melanoscelus in New England 24 Conclusion 25 INTRODUCTION. From the year 1905 to December 1, 1911, the State of Massachu- setts and the Bureau of Entomology, United States Department of Agriculture, shared the expenses involved in carrying on an investi- gation of the natural insect enemies of the gipsy moth {Porthettna dispar L.) and the brown-tail moth {Ewproctis chrysorrhoea L.) in Europe and of the introduction of parasites of these insects from 1 Tlie writer wishes to acknowledge the efforts of all those who have been connected with the Gipsy Moth Laboratory during the period covered by this report, who have assisted at various times in gathering and recording some of the data from which this bulletin has been prepared. H. A. Preston and C. E. Hood took most of the photographs and W. N. Dovener made the drawing of the adult Apanteles. He wishes
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