REPORT OF NATIONAL MUSEUM, 1921. 69 
N. Hoilister, in making a preliminary examination of the Celebesian 
mammals collected several years ago by Mr. H. C. Raven and 
presented by Dr. W. L. Abbott. Dr. Robert Ridgway, curator of 
birds, continued his work on, the ninth part of Bulletin 50, The 
Birds of North and Middle America. The matter relating to the 
higher groups, including genera of the Falconiformes, with the 
illustrations, was nearly finished. A large number of bibliographic 
references for the synonymies not only for part 9, but part 10 also, 
were collected. It is pleasant to be able to report that the manuscript 
for part 9 of this monumental work is nearing completion. Dr. 
Charles W. Richmond, associate curator, owing to the press of the 
routine curatorial work, found but little time for research. He 
made some progress, with Mr. B. H. Swales, in their proposed joint 
work on the birds of the island of Haiti, but not so much as they had 
hoped. Progress was also made on their proposed list of type 
specimens of birds in the National Museum, as mentioned in last 
year’s report. Mr. J. H. Riley, aid, continued his studies of the 
birds of Celebes and also furnished the curator with certain data 
on generic characters of vultures and hawks. The study of the 
North American turtles by Leonhard Stejneger progressed but 
slowly, due to the lack of leisure from routine work. Miss Doris 
Cochran, aid, besides identifying the African and Malaysian 
snakes in the collection, devoted special attention to the reptiles 
and amphibians of Haiti with a view to a herpetology of that 
island. Mr, B. A. Bean, assistant curator of fishes, reports satisfac- 
tory progress of the report by himself jointly with Dr. Henry W. 
Fowler, of the Academy of Natural Sciences, Philadelphia, on the 
fishes of the Wilkes exploring expedition and other collections. 
Dr. J. M. Aldrich, associate curator of insects, when not occupied 
with general routine duties, identifications, etc., devoted his time 
mostly to the study of the muscoid group of Diptera, publishing two 
short papers and nearly completing several others. Bulletin 116 of 
the Museum, being a monograph of the dipterous genus Dolichopus, 
the result of the joint labors of Mr. M. C. Van Duzee, Mr. Frank 
R. Cole, and himself, was completed and published during the year. 
The scientific activities of the honorary custodians of the various 
sections will appear from the appended bibliography. 
Dr. Mary J. Rathbun, honorary associate in zoology, has completed 
the second paper in the series on crabs obtained by the fisheries inves- 
tigation ship Endeavour, 1909-1914; it covers the Brachyrhyncha, 
Oxystomata, and Dromiacea, and, like the first paper on the Oxyrhyn- 
cha, will be published by the Commonwealth of Australia. Consid- 
erable progress has been made on a bulletin on the spider crabs of 
America. This is the second of her series of valuable monographs, 
which, when completed, will describe and figure all the species of 
