Thirteen new species of Agromyzidae (Diptera) from the United States, with new host and distribution records for 32 additional species Author Eiseman, Charles S. Author Lonsdale, Owen 0000-0001-7034-3330 onsdale@agr.gc.ca Author Linden, John Van Der 0000-0003-2651-0634 johnbvdl@gmail.com Author Feldman, Tracy S. 0000-0001-5939-6810 feldmants@sa.edu Author Palmer, Michael W. 0000-0003-1452-2152 mike.palmer@okstate.edu text Zootaxa 2021 2021-02-17 4931 1 1 68 journal article 7424 10.11646/zootaxa.4931.1.1 d63cab47-63f1-4fdc-9209-26a256c91ccb 1175-5326 4545337 88CF2B0D-E02B-46E1-9F52-1B95F717FC8F Melanagromyza sp. 3 Material examined. IOWA : Winneshiek Co. , Decorah , Twin Springs Park , 31.iā€“1.ii.2017 , em. by ix.2017 , J. van der Linden , ex Prenanthes alba , # CSE4660 , CNC1144026ā€“1144027 ( 2ā™€ ); 10.ix.2017 , em. spring 2018, J. van der Linden , ex Prenanthes alba , # CSE4662 , CNC1135654 ( 1ā™€ ) . Host. Asteraceae : Nabalus albus (L.) Hook. Larval biology. Internal stem borer. Lower in the stem, where it is hollow, larvae feed as described above for Melanagromyza arnoglossi . Puparium. Straw-colored; formed within the larval feeding site. Phenology and voltinism. Pupae overwinter, with adults emerging in spring or perhaps summer. Comments. This is the first record of any Melanagromyza from Nabalus (nor is any known from Prenanthes L., the European genus from which Nabalus was recently separated).