Myriophora luteitergum sp. nov. (Figs 5.6, 18.4, 22.1) Diagnosis. Female. Myriophora luteitergum is distinguished from most Myriophora by the yellow oviscape sclerites and inflated costal vein. It is differentiated from the similar M. flavicosta by the yellow and brown abdominal tergites, shorter posterior setae on T5 that extend about 1/2 the length of T6 (Fig. 22.1), and the narrower posterior margin of T6. Description. Female (Fig. 5.6). Body length 2.66 mm. Head: Frons dusky yellow, with 1 pair of supraantennal setae; supra-antennals originate above lower interfrontal setae. First flagellomere yellow, slightly pointed under arista. Palpus yellow, normal sized. Labrum prominent, enlarged. Labellum normal sized. Thorax: Scutum dusky yellow. Scutellum dusky yellow. Anterior scutellar setae about 3/4 the length of posterior pair. Pleuron yellow; anepisternum with a few setulae. Forefemur yellow. Midfemur yellow. Hind femur yellow. Wing length 2.31 mm; costal vein inflated; costal length 1.54 mm; costal ratio 0.67. Knob of halter light brown. Abdomen: Tergites 1 and 2 contrasting, yellow anteriorly, brown posteriorly; tergite 2 with strong, distinct setae on lateral margin. Tergite 5 contrasting, yellow anteriorly, brown posteriorly; posterior setae on tergite 5 long. Tergite 6 greatly narrowed posteriorly; posterodorsal setae on segment 6 shorter than posteroventral setae. Venter of abdomen with sparse short setae. Oviscape (Fig. 18.4) sclerites dusky yellow, strongly laterally compressed with conspicuous black setae; division between membrane and sclerites clearly defined. Distribution. Known from a single site in Colombia. Host. Unknown. Etymology. A noun from Latin meaning "yellow tergum" referring to the yellow coloration of the oviscape tergite. Holotype. ♀, COLOMBIA: Amazonas: Amacayacu NP, Matamata Station, 3.82°S, 70.26°W, 150m, 30.viii.1997, B. Brown, G. Kung, injured millipede [LACM ENT 102061] (IAVH).

Published as part of Hash, John M. & Brown, Brian V., 2015, Revision of the New World Species of the Millipede-Parasitic Genus Myriophora Brown (Diptera: Phoridae), pp. 1-79 in Zootaxa 4035 (1) on page 34, DOI: 10.11646/zootaxa.4035.1.1, http://zenodo.org/record/289850