REPORT OF NATIONAL MUSEUM, 1923. 67 



largely on Museum material. The study and determination of the 

 various lots of fishes received from time to time from various parts 

 of the world has been continued, the collections specially noteworthy 

 being those from the coast of South America and the coast and 

 fresh-waters of southern China. 



The research of Dr. J. M. Aldrich, associate curator of insects, 

 was mostly concentrated on the muscoid flies, a vast field with very 

 few workers, the results being embodied in papers, now in prepara- 

 tion, on the genera Ocyptera, Arrhinomyia, and Neomusca. Charles 

 T. Greene devoted himself quite largely to the early stages of dip- 

 tera, on which he has several papers in preparation. Quite a large 

 number of small papers have been published during the year by the 

 various custodians of sections, as shown in the bibliography, while 

 others are awaiting publication or are in various stages of prepara- 

 tion. A large number of papers by experts of the Bureau of Ento- 

 mology, based almost exclusively on Museum material, and conse- 

 quently of great benefit to the Museum, have already been submitted, 

 but their publication has been delayed by the exigency of the print- 

 ing appropriation. 



Dr. Mary J. Rathbun has completed another of her noteworthy 

 monographs on American crabs, the second of a contemplated series, 

 dealing with the American spider crabs, representing the families 

 Parthenopidae, Inachidae, and Hymenosomidae. The first volume 

 dealt with the Grapsoid crabs, and covered the families Goneplacidae, 

 Pinnotheridae, Cymopolidae, Grapsidae, Gecarcinidae, and Ocypodi- 

 dae. It was issued in 1917 as Bulletin 97, U. S. National Museum. 

 The following manuscripts were completed and transmitted for pub- 

 lication: A "List of the Brachyura from the 1921 Expedition of the 

 California Academy of Sciences to the Gulf of California," to the 

 California Academy; "Results of Dr. E. Mjoberg's Swedish Scien- 

 tific Expedition to Australia, 1910-13. Brachyura, Albuneidae, and 

 Porcellanidae," to the Stockholm Museum ; " Brachyuran crabs 

 collected at Curagao by Dr. 0. J. van der Horst in 1920," to the 

 Zoological Society of Amsterdam; "The Brachyuran crabs collected 

 by the U. S. Fisheries Steamer Albatross in 1911, chiefly on the west 

 coast of Mexico," to the American Museum of Natural History. Four 

 other papers prepared by Miss Rathbun and published during the 

 year are listed in the accompanying bibliography. In addition she 

 has made a great many routine identifications of miscellaneous lots 

 of crabs received during the year from various sources, and as time 

 has permitted, has continued her studies on fossil Crustacea, especially 

 of the west coast of North America. The " Report on the Crustacea 

 Macrura (Families Peneidae, Campy lonotidae, and Pandalidae) 

 obtained by the F. I. S. Endeavour in Australian Seas" prepared 



