PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES Fourth Series Vol. XXII, No. 1, pp. 1-66, pis. 1, 2 ; 8 text figs. December 18, 1936 THE TEMPLETON CROCKER EXPEDITION TO WESTERN POLYNESIAN AND MELANESIAN ISLANDS, 1933 No. 30 DIPTERA BY C. H. CURRAN American Museum of Natural History, New York City With the Collaboration of C. P. Alexander (Tipulidae) and E. T. Cre^son (Ephydridae) The Diptera collected by the Crocker Expedition to the South Seas comprise an interesting collection containing a fairly large percentage of undescribed species, and add to our knowledge of the distribution of species previously known to science. Some of the specimens are from other islands in the South Sea, but the vast majority are from the Solomon Group. I have also included in this report a small collection made by the Whitney South Sea Expedition of the Ameri-can Museum of Natural History so that our knowledge of the fauna may be more complete. In order to conserve space I have not included the collector's name after the data, except to indicate those specimens secured by the Whitney Expedition. All other specimens were collected by Mr. Maurice Willows, Jr., under the direction of Mr. Crocker, and the types and uniques are deposited in the Museum of the California Academy of Sciences. Duplicate material and the Whitney Expedi-tion specimens are in the American Museum of Natural History. No attempt has been made to identify the Culicidae, represented by several species in indifferent condition. Dr. C. P. Alexander has once more rendered great assistance by preparing a report on the Tipulidae and Mr. E. T. Cresson, Jr., has prepared the report on the December 18, 1936
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