19 



Mr. A. Menge, Danzig, Prussia. Types of the spiders described in 

 his monograph. 



Miss E. Sargent, Worcester, Mass. Biological specimens. 

 Mr. H. A. Hagen. Biological specimens, raised Insects. 



The additions to the collection by Mr. C. A. Dohrn, Fr. Mueller, 

 A. Menge, and H. Edwards are very important, and fill prominent 

 gaps of the collection. 



Scientific publications, based entirely or in part on the collec- 

 tion of the Museum, consist of the new edition of the Catalogue 

 of the Diptera of the United States, by Osten-Sacken, published by 

 the Smithsonian Institution, and Part VIII. of the monographic 

 revision of the European Trichoptera by R. M'Lachlan, published 

 in London, and several papers by Dr. H. A. Hagen. 



The work done by the assistant in charge of the Entomological 

 Department consists in the arrangement of the biological collec- 

 tion of the Hymenoptera, of the Cave Articulates (the collection of 

 which begins to be quite important), and of the Chernetidae, the 

 monograph of which is nearly completed. The Termitina, lately 

 arrived, have been studied, and several parts of their anatomy 

 and embryology are nearly ready for publication. 



The large collection of Trichoptera is rearranged, and fills forty 

 boxes. The Biological Collection, to which most of the time was 

 given, is so far advanced, that it will be possible to finish the ar- 

 rangement during the next two years. 



The Library of the department has been rearranged, the fcata- 

 logue completed, and the numerous duplicates exchanged for 

 works not represented. The Entomological Library contains 

 about 2,000 volumes and above 3,000 pamphlets. 



I may state that during the past year we have had a larger 

 number of visits than usual from scientific students, both native 

 and foreign, to study the biological as well as the systematic part 

 of our Entomological Collections. 



