76 REPORT OF NATIONAL MUSEUM, 1901. 



The synopses of the Molluscan families Xellinidse and Cardiidse by 

 Mr. William II. Dall, mentioned in the previous report, were pub- 

 lished during the year, together with a synopsis of the Lucinacea, the 

 fifth pari of a treatise on the Tertiary mollusks of Florida, eleven 

 other shorter papers on mollusks. and several articles of a general 

 character. In conjunction with Mr. Charles T. Simpson he prepared 

 a report on the mollusks collected by the LJ. S. Fish Commission 

 steamer Fish Hawk in Porto Rico. Mr. Simpson also published three 

 papers on river mussels and continued his studies of the naiades with 

 the view of publishing a monograph at some time in the future. Mr. 

 P. Bartsch continued studies on the Pacific Pyrainidellidse, and pub- 

 lished various short natural history papers in the "Osprey," of which he 

 is associate editor. 



In the Division of Marine Invertebrates, Dr. J. E. Benedict con- 

 tinued his studies of the crustaceans of the family Galatheidas and pre- 

 pared a report on the anomuran crustaceans of the Fish Commission 

 expedition of L899 to Porto Rico and a description of four new species 

 of symmetrical pagurid crustaceans, lie also published a paper on 

 the hermit crab, Pagurus oer?i7iardus, and its allies. 



Miss M. ,1. Rathbun published a synopsis of the grapsoid crabs of 

 North America and a report on the decapod and stomatopod crusta- 

 ceans collected duringthe Branner-Agassiz expedition to Brazil. She 

 has also completed keys to the various groups of North American crabs 

 besides the grapsoids, a report of the brachyuran and macruran crus- 

 taceans collected during- the Stanford University expedition to the 

 Galapagos Islands in 1898-99; a report on crustaceans of the same 

 groups collected in Porto Rican waters in 1899 by the U. S. Fish Com- 

 mission steamer Fish Hawk. In reporting on the decapod crustaceans 

 collected by the Ilarriman expedition in 1899, Miss Rathbun has under- 

 taken a review of the Decapoda of the west coast of North America, 

 making in that connection a study of the vast number of Macrura in 

 the Museum collected in years past by the naturalists of the steamer 

 Albatross and by Mr. William II. Dall and others. 



Miss Harriet Richardson prepared a report on the isopods of the 

 Stanford University expedition and published a report on the isopods 

 of the Branner-Agassiz expedition and a key to the isopods of tin 1 east 

 coasl of North America. 



Regarding scientific researches in the Division of Insects. Dr. L. O. 

 Howard reports as follows: 



All the material of the Harriman expedition lias been worked up, and reports upon 

 the same arc being published in the Proceedings of the Washington Academy of 

 Sciences. Mr. Coquilletl reported upon the Diptera, Mr. Kincaid upon the Ten- 

 thredinoidea, Sphegoidea, Vespoidea, and metamorphoses of Coleoptera, Mr. Schwarz 

 upon the Coleoptera and Psyllida?, Mr A.shmead upon the Hymeuoptera asa whole, 

 Dr. Dyarupon the Lepidoptera (descriptions of the new species being furnished by 

 several specialists, . Mr. Caudell upon the Orthoptera, Mr. Justus W. Folsom, of 



