REPORT OF NATIONAL MUSEUM, 1918. 41 



Dr. William T. M. Forbes, of Cornell University, studying Lepi- 

 cloptera; Mr. P. H. Timberlake, of the entomological laboratory of 

 the Hawaiian Sugar Planters' Association, Honolulu, Hawaii, ex- 

 amining parasitic Hymenoptera ; Prof. A. L. Lovett, of the Oregon 

 Agricultural College, Corvallis, Diptera of the family Syrphiclae; 

 and Prof. J. S. Hine, of the Ohio State University, Columbus, also 

 Diptera, especially of the family Asilidae. There being now no 

 specialist on spiders in Washington, through arrangement with Mr. 

 Samuel Henshaw, director of the Museum of Comparative Zoology, 

 Mr. Nathan Banks of that institution kindly consented to determine 

 material in that line for the National Museum, and collections of 

 spiders and neuropteroids from China were forwarded to him. 

 Specimens for study, nearly all intended for the revision of genera, 

 were also sent out as follows : To Dr. E. C. Van Dyke, Cornell Uni- 

 versity, beetles of the genera Silis and Meloc; to Mr. E. B. William- 

 son, Bluffton, Indiana, dragonflies of the genus Heteragrion; to 

 Dr. E. M. Walker, of the University of Toronto, Canada, dragon- 

 flies of the genus Somatochlora; to Mr. M. C. Van Duzee, Buffalo, 

 New York, flies of the genus DolicTwpus; to Prof. A. L. Lovett, 

 flies of the genus Criorkma; and to Prof. J. S. Hine, flies of the 

 genus Erax. 



Marine invertebrates. — The most valuable contribution of the year 

 in this division is considered by the curator, Dr. Paul Bartsch, to be 

 various sets of Philippine land shells, aggregating 88 specimens, 

 presented by Mr. Walter F. Webb, of Rochester, New York, prac- 

 tically all representing new forms. The collection contains 12 types 

 and cotypes, and in many cases the type specimens are uniques, se- 

 cured by Mr. Webb at his own expense and donated, with char- 

 acteristic generosity, to the national collections. The specimens are 

 very important as filling gaps in the chain of the geographical dis- 

 tribution of the Philippine land mollusks. The United States Bu- 

 reau of Fisheries was, as usual, one of the largest contributors, the 

 most important accession consisting of 156 lots, approximating 2,250 

 specimens, of identified Philippine chaetognaths, including the type 

 of a new species. Another transfer from that bureau of 24 specimens 

 contained the types of 11 new species of calcareous sponges collected 

 by the Albatross Northwestern Pacific cruise, 1906, and reported on 

 by Mr. Sanji Hozawa. From various bureaus of the Department of 

 Agriculture — the Biological Survey, Bureau of Entomology, Bureau 

 of Plant Industry, and the Federal Horticultural Board — miscel- 

 laneous lots of invertebrates were received during the year. An im- 

 portant donation from the Canadian Commission of Fisheries, 

 through Dr. Edward E. Prince, contained 107 specimens of mollusks 

 and 589 Crustacea secured by the Canadian Stef ansson Expedition to 

 the Arctic, 1913-1916. Dr. W. L. Abbott during his trip to Haiti 



