40 ENTOMOLOGICAL NEWS [xxxii, '21 Practically all of these species are now recognized by students of Hymenoptera and while most of them are repre-sented in the National Collection, yet so far as I have been able to determine there are no specimens which can be con-sidered as type material. Patton's descriptions, on the whole, are very satisfactory and we have less trouble understanding his species than we do those of some of the other students who worked at about the same time. In his revisionary work, Patton described thirteen genera ; eight of these belong to the superfamily Sphecoidea and five to the superfamily Apoidea. Among the bee genera are such common and well recognized ones as Bombomelecta, Diadasia, Emphor and Entechnia. Among the wasp genera the ones which are recognized all over the world are Isodontia, Aphilanthops, Larropsis and Microbembex. The other four wasp genera have been recog-nized by some students, while certain other students consider that they are founded upon too trivial characters to be treated as genera. In looking over Patton's papers I have been struck with the fact that while practically all of his systematic work was done on Hymenoptera, most of his biological observations were made on lepidopterous insects. Notes on Some of van der Wulp's Species of North American Anthomyiidae (Diptera). By J. R. MALLOCH, Urbana, Illinois. In working up the Anthomyiidae of North America I have found some difficulty in placing most of the described forms in their proper genera and this has been especially true of the species described by van der Wulp. At my request Mr. F. W. Edwards obtained for me specimens of twenty-four of the species from the original series in the British Museum as an exchange. These specimens have been used as a basis fof the following notes and have been incorporated in the collection of the Illinois State Natural History Survey. They are un-doubtedly paratypes of the species listed.
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