A revision of the beetle genus Margarinotus was continued by 

 Curator Wenzel (see page 60), who also prepared a paper on tech- 

 niques of photographing and studying minute insects. Papers on 

 the periodical cicada, begun last year by Associate Curator Dybas, 

 are nearing completion. One is being done in collaboration with 

 D. Dwight Davis, Curator of Vertebrate Anatomy, and the other 

 with Dr. Monte Lloyd of the University of Chicago. Research Asso- 

 ciate Charles H. Seevers continued his study of rove beetles, and 

 Associate Lillian A. Ross continued her work with spiders. 



Study of the minute landsnails of some West Indian islands con- 

 tinued to occupy Curator Fritz Haas, but he also described a remark- 

 able new fresh-water snail from Lake Titicaca in the Andes. The 

 completion of a monograph on the New Hebridean land and fresh- 

 water mollusks was the major accomplishment of Assistant Curator 

 Alan Solem. In addition he submitted for publication three faunal 

 reports on Melanesian marine shells, one on the nonmarine shells of 

 Florida Island of the Solomon Islands, a note on a New Queensland 

 landsnail, a commentary on the classification of some Pacific land- 

 snails, and a short paper on some Mexican landsnails. Assistant 

 Curator Solem has initiated another project, a check-list of New 

 Caledonian nonmarine shells. As an aid to preparing the essential 

 illustrations for his taxonomic work he developed a time-saving tech- 

 nique in co-operation with the Staff Artist and the Division of Pho- 

 tography (see page 88). 



The anatomy and evolution of carnivorous mammals was the 

 continuing project of Curator Davis. He also completed a report on 

 the mammals of North Borneo, based on material collected by the 

 Museum's Borneo Zoological Expeditions of 1950 and 1956. The 

 study of placentas and fetal membranes of primitive mammals col- 

 lected by the Borneo expedition of 1950 was continued by Associate 

 Waldemar Meister and Curator Davis. A paper on the breeding 

 cycle of mammals in a tropical rainforest, based on material from the 

 same expedition, was prepared by Assistant Phyllis Wade. Research 

 Associate R. M. Strong continued his studies of the anatomy of birds. 



Accessions— Zoology 



A number of outstanding additions to our collections were received 

 during the year. In the collection of Macarena mammals, some 440 

 specimens representing about 70 species (see page 60) are mammals 

 new to science and others recorded for the first time in Colombia 

 (among rarities in this collection is a Kappler's armadillo with a well- 



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