84 REPORT OF NATIONAL MUSEUM, 1020. 



os.s. considerable progress having been made during the year. Thus 

 in Diptera about 100 drawers have been arranged in the new system. 

 In the section of Hymenoptera, it was possible to install 21 new tem- 

 porary but dust-proof cases, which has permitted the rearrange- 

 ment of much of the unclassified material and eliminated many 

 Schmidt boxes. The new cases are built to hold 12 regular Museum 

 drawers and are placed on top of the permanent steel cases. The 

 unclassified material has been assembled and condensed so it can 

 be examined critically and placed where it belongs. The cynipoid 

 gall wasps have all been assembled by Mr. L. H. Weld. All of the 

 chalcids have been assembled, largely due to the activities of Mr. 

 Gahan, and Mrs. C. J. Weld has started to arrange a large portion 

 of the members of the family Chalcididae. The bees have been 

 brought together in one named series by the assistance of Prof. 

 T. D. A. Cockerell, of the University of Colorado, whose help has 

 been of the greatest value. 



In the division of marine invertebrates all the collections have been 

 overhauled and as far as possible put in order, and solutions, contain- 

 ers, and labels renewed in all cases where necessary. The sorting of 

 mixed small mollusk material has been continued, much of it arranged 

 and blank labelled ready for registration and specific identification. 

 Sorting of the miscellaneous alcoholic invertebrates into component 

 groups has been continued. The segregating of the echinoderms 

 from the rest of the marine invertebrates, entails the shifting of the 

 entire alcoholic storage, exclusive of mollusks, which is under way. 

 This was necessitated by the creation of the new division of echino- 

 derms. The cataloguing of the various groups of alcoholic inver- 

 tebrates has been continued. The material has been placed in its 

 systematic position in the storage stacks. In the mollusks the rear- 

 ranging of the East Coast collections has been continued, the Gas- 

 tropods have been completed, and the work on the Pelecypods is well 

 under way. The Scaphopods have not only been rearranged, but a 

 report thereon has been prepared by Mr. John B. Henderson. 



As the division of echinoderms was established only in April, 1920, 

 the work of removal of the dried collections to the new location has 

 occupied most of the time. Of the alcoholic material only the cri- 

 noids have as yet been moved, and their rearrangement is still un- 

 finished. Owing to other pressing work and lack of assistance, the 

 readjustment of the collections has of necessity been delayed. 



Mr. W. R. Maxon, associate curator, reports that in the division of 

 plants the curatorial work connected with the upkeep and increase of 

 the National Herbarium has progressed satisfactorily during the 

 past fiscal year. In particular the return of Mr. Leonard and the em- 

 ployment of Mr. Killip as aid have been of material assistance in 

 routine matters. In addition to the distribution of a considerable 



