1870.] 



SENATE— No. 170. 



21 



label agreeing with the former collection, so that in fact the in- 

 tegrity of both collections is preserved. 



The collection representing the metamorphoses and all the 

 different stages of the species is begun. The objects suitable for 

 the purpose are taken out of the alcoholic collection, enclosed 

 in glass tubes of a particular pattern, and closed in a manner 

 used by me and found satisfactory in my own collection, for 

 many years. The glass tubes, always labelled inside, are 

 contained in eighteen boxes. Their systematic arrangement is 

 partly completed, especially in some families of the Coleoptera. 



The biological collection is partly arranged and fills twenty 

 boxes, consisting chiefly of the nests of the Hymenoptera, the 

 silk-producing Lepidoptera, the American galls and the insects 

 injurious to trees. The splendid additions presented to the 

 Museum by the celebrated Professor Ratzeburg, of Berlin, form 

 a prominent and beautiful part of the collection. Some very 

 fine specimens were collected by myself in the White Mountains. 

 The materials contained in the Museum are comparatively rich. 

 Some boxes are placed in the exhibition rooms. 



The physiological collection consists as yet only of one box, 

 with some beautiful specimens. The Morpho with the head of 

 the caterpillar, is worthy to be remarked even in this general 

 report. 



The palasontological collection received a very considerable 

 addition from specimens purchased from Dr. Krantz in Bonn, 

 Prussia, belonging to the Jurassic schists of Solenhofen and to 

 the Rhenish brown coal of Rott in the Siebengebirge. Most of 

 them are types described and published in H. Y. Meyers' Palae- 

 ontologica, by the late Senator Y. Heyden and myself. The 

 Diptera, Coleoptera, and some Odonata form the principal in- 

 sects of the lignites, the Orthoptera and Neuroptera of the Ju- 

 rassic schists. One specimen of Locusta speciosa Germar is the 

 finest and most beautiful yet found. I had seen it some years 

 ago in Munich, but it was then too expensive to be secured. 

 Some of tlie Odonata are really beautiful. The collection is 

 arranged, labelled and exhibited in the window cases of the 

 exhibition room. 



The microscopical collection has a beginning in preparations 

 made by myself during my entomological work at the Museum, 

 employing for that object duplicates otherwise useless for study. 



