A new genus of Chamaemyiidae (Diptera: Lauxanioidea) predaceous on Adelgidae (Hemiptera), with a key to chamaemyiid species associated with Pinaceae-feeding Sternorrhyncha Author Gaimari, Stephen D. 0000-0002-4240-7154 California State Collection of Arthropods, California Department of Food & Agriculture, Plant Pest Diagnostics Branch, 3294 Meadowview Road, Sacramento, California 95832 - 1448, USA. sgaimari @ gmail. com; https: // orcid. org / 0000 - 0002 - 4240 - 7154 United States Department of Agriculture - Forest Service, Northern Research Station, 51 Mill Pond Road, Hamden, Connecticut 06514, USA. nathan. p. havill @ usda. gov; https: // orcid. org / 0000 - 0002 - 4004 - 8266 sgaimari@gmail.com Author Havill, Nathan P. 0000-0002-4004-8266 nathan.p.havill@usda.gov text Zootaxa 2021 2021-11-09 5067 1 1 39 journal article 3317 10.11646/zootaxa.5067.1.1 d86446dd-01d8-4ebe-8d43-c19e94d70334 1175-5326 5656435 3915D929-50E3-4235-A02F-EA9DE4B1E48F Leucotaraxis atrifacies ( Aldrich, 1925: 152 ; Leucopis ), comb. nov. Type locality: USA : California (HT ♀ , USNM ) . This species is known only from western North America, attacking species of Adelges and Pineus infesting Tsuga and Pinus (details provided above). They have also been swept from Cinara ponderosae infesting young stands of Pinus ponderosa .