REPORT OF NATIONAL MUSEUM, 1921. 73 
Dr. E. R. Dunn, of the Museum of Comparative Zoology, identified 
various reptiles and batrachians during his visits to the Museum. 
Dr. O. P. Hay and Mr. C. W. Gilmore have examined reptilian 
material from time to time. Mr. Remington Kellogg, of the Bio- 
logical Survey, has spent considerable time in the division of reptiles 
identifying and studying the entire collection of American toads of 
the genus Bufo with a view to preparing a monograph. 
Mr. Walter Koelz’s studies of the whitefishes in the division of 
fishes, mentioned in last year’s report, were concluded during the 
present year. Similarly Mr. Carl L. Hubbs, of the University of 
Michigan, studied the lancelets and lampreys of the collection in 
connection with a forthcoming review of these groups. Dr. Henry 
W. Fowler, Philadelphia Academy of Natural Sciences, has greatly 
aided in the ichthyological work of the Museum. 
It is quite natural that when specialists visit the Museum to 
examine the collections in connection with the working up or mono- 
graphing larger groups in their home museums or own private col- 
lections, a considerable amount of original identification or correc- 
tion of current identifications of our own specimens must result. In 
this way the National Museum benefits directly by the visits of 
scientific workers from other institutions. Again, with the lack in 
Washington of specialists in many groups, the Museum is entirely 
dependent upon the generous assistance of many outsiders for proper 
identification of specimens sent to it. For these favors grateful 
acknowledgments are due. The division of insects has been par- 
ticularly fortunate in this respect during the present year. Thus 
Dr. E. P. Felt, State entomologist of New York, has recently re- 
turned a large collection of the dipterous gall-midges (Cecido- 
myidae) which were sent him several years ago. He has mounted 
our material on microscopic slides, the only possible permanent 
method for these very delicate and tiny flies; most of our material 
is now returned as types of new species, and he has added a large 
amount of his own type material, making our collection in the family 
probably second only to that of the New York State Museum in the 
world. As usual, Prof. T. D. A. Cockerell, of the University of 
Colorado, has aided greatly with the bees, while Mr. Nathan Banks 
and Dr. R. V. Chamberlin, both of the Museum of Comparative 
Zoology, have identified spiders and myriopods, respectively. So 
much work of a similar nature has been done by the various mem- 
bers of staff of the Bureau of Entomology in connection with their 
other studies that it would be impractical to acknowledge the 
assistance separately and individually. 
What is true of the division of insects with regard to dependence 
on the aid of specialists residing outside of Washington for aid in 
identifying and classifying material due to insufficiency of the 
