Miss L. E. CHEESMAN'S EXPEDITIONS f TO NEW GUINEA f TRICHOPTERA By D. E. KIMMINS SYNOPSIS This paper is based upon material collected by Miss L. E. Cheesman, 1933-34, 1936 and 1938. Fifty-one new species are described, in nine families, and keys are given to the Papuan species of the genera Chimarra, Polycentropus, Oecetis and Triaenodes. THE greater part of the material upon which this paper is based was collected by Miss L. E. Cheesman on her expeditions to New Guinea in 1933-34, 1936 and 1938, to which has been added such other unidentified material in the British Museum from New Guinea. Some explanation is due for the long delay in working out these collections, which were received by the British Museum before the war by my late colleague Mr. M. E. Mosely. He was proposing to work on them but on hearing from Dr. G. Ulmer of his work on a large collection of Trichoptera from the Lesser Sunda Islands, Mosely decided to put the Papuan material on one side until the completion of Dr. Ulmer's work. The war delayed the publication of Ulmer's papers and Mosely died before they were completed. Miss Cheesman was not in any way specialising in the collection of Trichoptera, but in spite of this, she has succeeded in bringing the total of species for New Guinea up to eighty-six, of which some fifty are here described as new to science. This number is probably only a fraction of the total fauna, since comparatively little work has been done on the Trichoptera of this area, and consequently it is not surprising that many species appear to be endemic. In our present state of knowledge, one cannot say much about the origin of the Papuan Trichopterous fauna, other than that there are affinities with the faunas of Australia, Solomon Islands, Fiji, Borneo and the Sunda Islands. The author would like to express to Miss Cheesman his thanks for the oppor-tunity to work on this material. The types of all new species are deposited in the British Museum (Natural History) and all material was collected by Miss Cheesman unless otherwise stated. Names of species not collected by Miss Cheesman are enclosed within square brackets. ENTOM. II, 4. 5
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