NARRATIVE OF PROGRESS OF WORK. 59 



might be employed as a professional collector to undertake work in 

 the same manner as that done by Fritz Wagner in Vienna. Dr. 

 Heller recommended Mr. Edward Schopfer, who was at once engaged. 

 Although at the date of the first visit to him the season was already 

 considerably advanced (July 7), Mr. Schopfer had rearing cages in 

 operation in his rooms, and in these cages were a number of nearly 

 full-grown larvae of the gipsy moth. He knew the localities about 

 Dresden where these insects were to be found, and at once began 

 sending specimens to Boston. The well-known Forest Academy at 

 Tharandt, near Dresden, was visited, and Prof. Arnold Jacobi and his 

 assistant, Mr. W. Baer, were interested and promised assistance, 

 especially in the matter of sending specimens of Calosoma sycophanta 

 (see PI. I, frontispiece) and C. inquisitor. Other trips were made 

 in the vicinity of Dresden, and then the journey was resumed to 

 Zurich, where, through the kindness of Dr. Herbert Haviland Field, 

 director of the Concilium Bibliographicum Zoologicum, the writer 

 met Miss Marie Ruhl, editor of the Societas Entomologica, a very 

 well-posted entomologist, especially on matters relating to Lepidop- 

 tera, who had and has a large correspondence throughout northern 

 Germany. She was engaged as the official agent of the investigation 

 for that part of Germany and was able, through her own work and that 

 of her correspondents, to send a large amount of material to Boston 

 before the close of the season of 1905, and has since continued the 

 work. 



From Zurich the trip was resumed to Paris, where some time was 

 spent in interviewing Dr. Paul Marchal, the entomologist of the 

 agricultural school conducted under the ministry of agriculture, and 

 other entomologists, and in visiting the scientific societies for the pur- 

 pose of interesting naturalists in the work. Many trips were taken 

 to towns around Paris in search of the pupae of the gipsy moth and to 

 visit local collectors in search of information, after which the return 

 journey was made to America. 



The result of this initial trip was to demonstrate that it is an easy 

 matter and a comparatively inexpensive one to import certain of the 

 parasites of both the gipsy moth and the brown-tail moth in living 

 condition into the United States. The most important part of the 

 European range of the two species was visited, and the entomologists 

 were organized into an active body of assistants. 



Mention has already been made of the number of boxes sent in by 

 Dr. Leonardi from Sardinia. Ten boxes were shipped by Fritz Wag- 

 ner from Vienna, 47 boxes from Schopfer in Dresden, and 36 from 

 Miss Ruhl in Zurich, all of these containing parasitized larvae or pupae 

 of the gipsy moth or brown-tail moth. 



Acting upon Prof. Jablonowski's observations concerning the 

 existence of parasites in the wintering nests of the brown-tail moth, 



