REPORT OF NATIONAL MUSEUM, 1923. 75 



The collections of the division of insects have been examined by a 

 number of entomologists as follows: Prof. J. Chester Bradley, of 

 Cornell University, made three trips to Washington to study the col- 

 lections of South American species, and to compare types of various 

 species from North America and the Philippines. He has also spent 

 considerable time consulting with the specialists on a new classifica- 

 tion of the order Hymenoptera ; C. Howard Curran of the Entomo- 

 logical Branch, Department of Agriculture, Ottawa, Canada, spent 

 a week in the winter studying Diptera of the family Syrphidae ; Dr. 

 F. E. Lutz of the American Museum of Natural History, made two 

 visits to the Museum for the study of types and identified material 

 in the collection belonging to the bee genera Trigona and Melipona; 

 Dr. W. T. M. Forbes of Cornell University spent some days at the 

 Museum in the study of Lepidoptera; Dr. William T. Barnes, De- 

 catur, Illinois, who has one of the largest private collections in the 

 world, visited the Museum in February for a few days, to examine 

 Lepidoptera; Eobert M. Fouts, Washington, D. C, has spent some 

 time studying the Serphoid parasites in the collection; C. F. W. 

 Muesebeck of the Bureau of Entomology, spent about four weeks in 

 the study of the Braconid parasites collection belonging to the genus 

 Microhracon; H. L. Viereek, during the past fiscal year while con- 

 nected with the Bureau of Biological Survey, made many trips to the 

 Museum to consult the collection of bees belonging to the genus 

 Andrena; J. B. Malloch, who is connected with the Biological Sur- 

 vey, visits the Museum frequently for comparison and study of the 

 Diptera. In the division of marine invertebrates Dr. A. G. Hunts- 

 man of the Biological Board of Canada, spent two days in examin- 

 ing a number of Ascidian type specimens in connection with his 

 forthcoming monograph on the Ascidians of the Northwest coast; 

 Prof. E. N. Griggs, of George Washington University, availed him- 

 self of the facilities of the division during part of two days looking 

 up information regarding invertebrates relative to a lecture course 

 on evolution; Dr. Julia A. Gardner of the Geological Survey has 

 several times consulted our slides of mounted foraminifera in fur- 

 therance of her paleontological researches ; as in past years material 

 assistance has been rendered members of the scientific staff of the 

 Biological Survey in the identifications of invertebrate remains, 

 chiefly Crustacea, found in bird stomachs; the Bureau of Fisheries, 

 in the determination and furnishing of information relative to ma- 

 rine and aquatic invertebrates ; the Zoological Division of the Bureau 

 of Animal Industry in the classification of invertebrate hosts of ani- 

 mal parasites; and the Federal Horticultural Board in identifying 

 invertebrates found associated with various plant importations. As 

 in former years, workers from the U. S. Geological Survey have 



