1876.] 



SENATE— No. 10. 



21 



REPORT OX THE DIPTERA. 



By R. Osten-Sacken. 



The principal work which occupied me duriug the past 

 year was the working up of the Tabaiiidce of the collection. 

 The result of this work appeared in the Memoirs of the Bos- 

 ton Society of the Natural Sciences ; as, Prodrome of a Mono- 

 graph of the Tahanidce of the United States : Part 1. The 

 second part is in type. All the typical specimens of this 

 monograph are in the collection of the Museum. In a similar 

 manner, a smaller monogi'aphic essay on the American sjpecies 

 of the genus Syrphus, was prepared in putting in order the 

 specimens of the collection. The additions to the collection 

 were but few. 



1. Dr. Kidder, who accompanied one of the United States 

 Astronomical Expeditions in 1874, brought three remarkable 

 species of wingless, or almost wingless, Diptera from Ker- 

 guelen's Island. 



2. Mr. Belanger, Curator of the Museum in Quebec, sent 

 a considerable collection, consisting of numbered duplicates, 

 for determination ; they all remained for the Museum. 



3. Mr. E. Palmer sent a small but interesting collection 

 from the Island of Guadeloupe and the Pacific Ocean. (In- 

 serted a notice about them in the Proceedings of the Boston 

 Society of Natural History in October.) 



4. A collection from the environs of Detroit, Mich., was 

 presented by Mr. Hubbard. 



5. Some interesting Diptera from the environs of Boston 

 were given b}' Mr. Bowditch ; from the White Mountains by 

 Mr. Geor2:e Dimmock. 



6. I acquired a number of Diptera^ collected by Mr. H. K. 

 Morrison in the White Mountains, some of them new to the 

 Museum ; some useful duplicates. 



Besides Mr. Belanger's collection, I named several smaller 

 collections, sent to me for that purpose. 



