2 BULLETIN 417,, TJ. S. DEPAKTMENT OF AGRICULTURE. 



and management of this work was placed in the hands of Dr. Howard 

 and the appropriation by the State was made available for meeting 

 a part of the expense of introducing, breeding, and disseminating such 

 parasites as could be secured. This arrangement was continued after 

 the moth work in Massachusetts was transferred to the State forester 

 and the cost of importations, breeding work, and colonization of para- 

 sites from the gipsy moth laboratory, Melrose Highlands, Mass., was 

 jointly financed by the Bureau of Entomology and the office of the 

 State forester, conducted by Mr. F. W. Rane. Owing to the con- 

 tinued spread of the moths above mentioned, and the extension of 

 the infested territory into other New England States, the problem 

 became interstate in scope and since December 1, 1911, the entire 

 work has been financed by the Bureau of Entomology. 



A report has already been published by Dr. L. O. Howard and 

 Mr. W. F. Fiske as Bulletin 91 of this bureau, 1 relative to the parasite 

 work, and in Bulletin 101 of this bureau a detailed account is given 

 of the satisfactory results secured from the introduction and estab- 

 lishment, in New England, of Calosoma sycophanta L., a predatory 

 beetle imported from several European countries. Bulletin 251 of 

 the United States Department of Agriculture, by A. F. Burgess and 



C. W. Collins, published in 1915, brings the data known about this 

 predator up to that date. 



In connection with the importation of this beetle and of several 

 other species of Calosoma secured from Europe and Japan, it was 

 found necessary to make a thorough study of the seasonal history of 

 the different species concerned, in order that the work might be carried 

 on in an intelligent way. Some time has also been devoted to investi- 

 gating the seasonal history and habits of some of the native species of 

 this genus, as well as to determining the reason why they have not 

 proved as helpful in destroying lepidopterous larva? as have the spe- 

 cies imported from abroad. Many entomologists and curators of 

 museums throughout the United States and Canada have sent full 

 information concerning the various species of Calosoma in the collec- 

 tions in their charge, together with localities from which the speci- 

 mens were secured. A considerable number have also forwarded 

 beetles of this genus, and this has made possible an investigation of 

 the habits of a considerable number of species that do not occur in 

 New England. While it is impossible to mention individually all 

 those who have so kindly assisted in this work by furnishing live 

 specimens or data, the writers wish to extend their thanks for the 

 help which has been so freely given. Special acknowledgments are 

 due to Dr. L. O. Howard, who has encouraged the work which has 

 been carried on in this direction and made helpful suggestions from 

 time to time; to Mr. W. F. Fiske for his continued interest and 

 hearty cooperation; to Mr. E. A. Schwarz for examining and deter- 

 mining material received from foreign collectors ; to Mr. H. S. Barber 

 and other assistants in the Bureau of Entomology at Washington, 



D. C, for collecting living material; to Dr. W. D. Hunter and the 

 assistants in Southern Field Crop Insect Investigations of this 

 bureau for similar collections ; to Dr. W. M. Mann for the loan of 

 his extensive collection of Calosoma; to Messrs. Kirkland, Rane, and 

 many of the assistants engaged in gipsy moth- and brown-tail moth 



i Reprinted as House Document 977, 62d Congress, 3d session. 



