PROCEEDINGS OF THE UNITED STATCS NATIONAL MUSEUM issued p^^lVA. 0*s^i ^tf the SMITHSONIAN INSTITUTION U. S. NATIONAL MUSEUM Vol.84 Washington : 1937 No. 3011 NEW MUSCOID FLIES (DIPTERA) IN THE UNITED STATES NATIONAL MUSEUM By David G. Hall Bureau of Entomology and Plant Quarantine, United States Department of Agriculture Included among the species of muscoid flies described in this paper are certain forms that are of considerable interest because of their unusual host relationships or their economic importance. Names for these have been requested in connection with investigations being conducted on their biology or control. Genus HYLEMYA Robineau-Desvoidy HYLEMYA ABDENA, new species Figure 19 Male. — Head with front narrower than breadth of anterior ocellus and but faintly discernible except anteriorly; frontal bristles about eight, only three of these strong ; paraf rontals and paraf acials thinly silvery gray pollinose; antenna black, third segment slightly longer than second; arista pubescent; bucca narrow, black-haired; palpus and proboscis black, both ordinary. Thorax densely yellowish gray pollinose, opaque, striping hardly discernible; anterior acrostichal bristles three, the median pair strong; anterior dorsocentral bristles two, strong; humeral bristles two; sublateral bristles two; preapical bristles two, the anterior of which are at least half as long as the posterior ; posterior dorsocentral 118806—37 201
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