Three new Neotropical genera of Odiniidae (Diptera: Acalyptratae) Author Gaimari, Stephen D. text Zootaxa 2007 1443 1 16 journal article 10.5281/zenodo.176054 8087be13-7a23-4270-beb1-65f12a342f19 1175-5326 176054 Key to New World genera of Odiniidae Following is a key to all odiniid genera in the New World. Nearctic genera not known from the Neotropical Region are indicated with brackets []. The two species of Helgreelia , gen. nov. , are also differentiated in the key. 1. Posterior ocelli in front of line between medial vertical setae; ocelli usually arranged in isosceles tri- angle with distance between posterior pair conspicuously less than between either posterior ocellus and anterior ocellus; frons usually relatively arched (sometimes conspicuously tuberculate); scutel- lar disc sometimes setulose; in profile, face and frons more or less in line or sloping; TRAGINOPI- NAE.....................................................................................................................................................3 - Posterior ocelli in line with medial vertical setae; ocelli arranged in equilateral triangle or with dis- tance between posterior pair greater than between either posterior ocellus and anterior ocellus; frons flat to slightly concave; scutellar disc bare; in profile, face distinctly angulate with frons at antennal insertion; ODINIINAE ........................................................................................................................2 2 (1). Postocellar setae reduced, short and thin; dorsocentral setae 4 (1+3); anepisternum with 1–2 strong setae plus several setulae; dorsal preapical tibial setae well developed ..... [ Neoalticomerus Hendel ] - Postocellar setae well developed, subequal to ocellar setae; dorsocentral setae 5 (1+4); anepisternum bare; dorsal preapical tibial setae thin, hair-like ...................................... Odinia Robineau-Desvoidy 3 (1). Frons lacking enlarged tubercle, but occasionally with ocelli on raised bump which is little larger than diameter of anterior ocellus.........................................................................................................6 - Ocelli on moderately large to large tubercle, well in front of vertex..................................................4 4 (3). Arista long plumose; vein M1 strongly curved anterad at apex ........................ Paratraginops Hendel - Arista pubescent; vein M1 straight......................................................................................................5 5 (4). Propleuron bearing 2 setae .................................................................................. Neotraginops Prado - Propleuron lacking setae ...................................................................................[ Traginops Coquillett ] 6 (3). Genal seta absent; costal vein extended to vein R4+5 or slightly beyond ( Figs. 3 A, 3C) ................... 9 - Genal seta present; costal vein extended to vein M1 ( Fig. 3 B) .......................................................... 7 7 (6). Scutellum at most bearing 2–5 setulae along margin .......................................... Lopesiodinia Prado - Scutellar disc and margins bearing numerous setulae ....................................................................... 8 8 (7). Only anterior fronto-orbital seta inclinate ........................................................ Schildomyia Malloch - Several anterior fronto-orbital setae inclinate ( Fig. 2 C) ........................... Neoschildomyia , gen. nov. 9 (6). Postocellar setae present; posterior part of head straight from dorsal view ( Fig. 2 E) .......................... ............................................................................................................................. Pradomyia gen. nov. - Postocellar setae absent; posterior part of head concave from dorsal view ( Fig. 2 A) .....................10 10 (9). Several anterior fronto-orbital setae inclinate; scutellar disc setulose .................... Shewellia Hennig - With single inclinate fronto-orbital seta ( Fig. 2 A); scutellar disc bare .... Helgreelia , gen. nov. …. 11 11 (10). Abdomen orange, with fine pale setulae ( Fig. 1 A, inset) ...................................... H. albeto , sp. nov. - Abdomen grey and brown pruinose, with black setulae ( Fig. 1 B, inset) .............. H. parkeri , sp. nov.