Nearctic Anthomyzidae: a monograph of Anthomyza and allied genera (Diptera) Author Roháćek, Jindřich Author Barber, Kevin N. text Acta Entomologica Musei Nationalis Pragae 2016 suppl. 2016-12-30 56 1 412 journal article 9539 10.5281/zenodo.4272829 e8b0cf7e-6ff3-40d9-8e92-87e099b9cefe 0374-1036 4272829 urn:lsid:zoobank.org:pub:E95E58A5-E0F1-4237-9D7C-4A81BB3120DD Key to identincation of the Nearctic species of the Anthomyza gracilis group 1 Head in pronle slightly higher than long; eye broad, little narrowed posterodorsally ( Fig. 518 ); orbit dark from vertex beyond posterior ors, usually to about midway between posterior and middle ors ( Fig. 519 ); in lateral view, narrow area above postgena anteriorly greyish but abruptly becoming shiny brown to black on occiput ( Fig. 518 ); caudal process of male with ventral appendage more elongate ( Fig. 532 ) and thin in lateral pronle ( Fig 530 ) and lacking anteroventral angularity; aedeagal part of folding apparatus with strong spines ventrally ( Figs 528, 534 ); female T7+S7 with ventral anteromedial area triangular and distinctly domed (medially convex), ventral desclerotized area small and without sclerotized posteromedial appendage ( Figs 536, 538 ). ........................................................................................... A. furvifrons sp. nov. – Head in pronle more depressed, longer than high; eye elongate, narrowed posterodorsally ( Figs 520, 522 ); orbit dark only from vertex to posterior ors and abruptly yellow in front of it ( Figs 521, 523 ); in lateral view, area above postgena somewhat broader and generally continuously greyish from margin of eye onto occiput ( Figs 520, 522 ); caudal process of transandrium with ventral appendage less elongate ( Figs 555 , 584 ) and thicker in lateral pronle ( Figs 553 , 582 ) and anteroventrally more or less angular; aedeagal part of folding apparatus without strong spines ventrally ( Figs 556, 558 , 585, 587 ); female T7+S7 with ventral anteromedial area shorter and longitudinally grooved ( Fig. 565 , arrow) often producing a chordate posterior margin, ventral desclerotized area large and posteromedial appendage behind it well sclerotized ( Figs 564–566, 568, 570 , 589, 591 ). .................................................................................... 2 2(1) Thorax brownish grey to dark bronze microtomentose; midline sternal setae predominantly black. f 1 usually with at least some grey to brown darkening on posterior surface ( Fig. 522 ), at least basal corner of cx 1 always dull grey- to brown-darkened, sometimes also other femora and tibiae partly darkened ( Fig. 574 ) especially t 1 opposite the ctenidial spine; frons with medial darkening extending anteriorly to at least middle ors ( Fig. 523 ) and as far as anterior margin; male preabdominal sterna dark, ochreous brown; caudal process of transandrium with ventral appendage widely naring ventrally ( Fig. 582 ) and posteriorly ( Figs 583, 584 ); female T7+S7 with pale-pigmented anteroventral strip broadly extended dorsolaterally ( Fig. 591 ), reaching above 7th spiracle ( Fig. 589 ), and shiny secondary posterolateral sclerotization prominent ( Fig. 589 , arrow); associated with horsetails ( Equisetum spp.). ................................. A. equiseti sp. nov. – Thorax usually pale grey microtomentose; midline sternal setae predominantly pale (very rarely all black). All femora and tibiae entirely yellow ( Figs 520 , 545 ), cx 1 sometimes with a shiny brown darkening basally; frons with anterior margin usually broadly yellow ( Fig. 521 ), rarely with medial darkening extending beyond middle ors; male preabdominal sterna pale, dirty yellowish; caudal process of transandrium with ventral appendage moderately naring ventrally ( Figs 553 , 561 ) and posteriorly ( Figs 554, 555 ); female T7+S7 with pale-pigmented anteroventral strip not extended dorsolaterally ( Figs 564, 565 , 568 ), and shiny posterolateral sclerotization absent ( Figs 564 , 566 ); associated with grasses or sedges. ....................................... A. vulgaris sp. nov.