KEPORT OF NATIONAL, MUSEUM, 1919. 83 



The bibliography for the year indicates what the staff of the 

 division has published during the year. Most of the work done is 

 of a taxonomic character, and consists primarily and in the main 

 of determining specimens submitted to the Bureau of Entomology. 

 Incidentally, revision work of a more general character is undertaken 

 usually in conjunction with or necessitated by the above. Thus 

 several monographic revisions of families or greater groups have 

 been begim or developed during the year, and one, a synopsis of 

 the tribes and genera of muscoid flies of the world, by Dr. C. H. T. 

 Townsend, has been completed, though not yet published. 



Prof, T. D. A. Cockerell, of the University of Colorado, has con- 

 tinued his studies of and described a large number of bees in the 

 national collection. Mr. R. V. Chamberlain, of the Museum of Com- 

 parative Zoology, has begun the revision of our entire collection, 

 of Myriopoda. During the past year the collections have been con- 

 sulted by the following entomologists, in addition to the specialists 

 of the Bureau of Entomology, who have always had free access to 

 the specimens: Messrs. E. T. Cresson, jr., and J. A. G. Rehn, of 

 the Academ.y of Natural Sciences, of Philadelphia : C. C. Crampton, 

 of the ISIassachusetts Agi'icultural College, Amherst, Massachusetts ; 

 C. B. Williams, of Trinidad, West Indies ; and H. G. Barber, William 

 T. Davis, C. W. Leng, and L. B. Woodruff, of New York. The en- 

 tire collection of Myriopoda, contained in 509 bottles and jars, were 

 sent to Mr. R. V. Chamberlain, as noted above. A few Diptera were 

 sent for study to Prof. C. L. Metcalf , of the Ohio State University, 

 Columbus, Ohio, and 31 Lepidoptera to Sir George F. Hampson, of 

 the British Museum, London, for study in connection with his re- 

 vision of the Noctuidae. 



Marine invertebrates. — With the exception of the John B. Hen- 

 derson collection of Antillean land mollusks, already referred to 

 above, the accessions for the rest of the marine invertebrates are not 

 as valuable as in past years, chiefly because the activities of the 

 vessels of the Bureau of Fisheries have been shifted to work con- 

 nected with the war, thus interfering with the normal lines of in- 

 vestigation which in times of peace have resulted in transfer of 

 large collections to the United States National Museum. Neverthe- 

 less, there are a number of very notable accessions meriting special 

 mention, such as 50 specimens of land shells from the Philippine 

 Islands, among them no less than 7 types of new species and sub- 

 species, donated by Mr. Walter F. Webb, of Rochester, New York. 

 These additions are the more valuable as they are chiefly from un- 

 explored regions in the archipelago, and in most cases unique speci-. 

 mens, presented with characteristic generosity to the National Mu- 

 seum to the detriment of his own private collection. Mr. R. L. 



