Revision of the New World Scentless Plant Bug Genus Niesthrea (Hemiptera: Heteroptera: Rhopalidae), with Descriptions of Six New Species and a Key to the Species Author Melo, María Cecilia División Entomología, Museo de La Plata, U. N. L. P., Paseo del Bosque s / n ° (B 1900 FWA), La Plata, Buenos Aires, Argentina, ceciliamelo@ Author Henry, Thomas J. Systematic Entomology Laboratory, Agricultural Research Service, Department of Agriculture, c / o National Museum of Natural History, Smithsonian Institution, P. O. Box 37012, Washington, DC 20013 - 7012, and text Insect Systematics and Diversity 2019 2019-10-31 3 5 9 1 36 http://dx.doi.org/10.1093/isd/ixz014 journal article 10.1093/isd/ixz014 2399-3421 5385086 Niesthrea truncata Melo and Henry sp. nov. ( urn:lsid:zoobank.org:act: 22742155-BCA7-4B5F-9072- FB64BDB1ECED ) ( Figs. 4H , and 11A–B ) Diagnosis This species is distinguished by the large rounded (flat on inside) parameres ( Fig. 11A ) with a blunt process on the inner side of the apex, the short quadrate median lobe, and the relatively long, slender, apically rounded lateral lobe in lateral aspect. The labium extends to the base of abdominal segment III. The strongly rounded parameres ( Fig. 11A ) of N. truncata are most similar to those of N. casinii ( Fig. 7A ), but can be recognized by the short, quadrate median lobe and longer, stouter, and apically rounded lateral lobe, whereas N. casinii has a distinctly conical median lobe and the lateral lobe is shorter, more slender, and apically pointed. Description Head : Yellowish brown, mark on inner margin of ocelli, median line, and cluster of punctures on frons and vertex dark brown; with dense, erect, pale setae. Labium : Extending to base of grooved abdominal segment III . Antenna : Segment I pale yellowish brown, with narrow, dark brown, inverted, V-shape mark dorsally and a single, narrow, dark brown line ventrally ; segments II and III pale yellowish brown, with a narrow indistinct brown line dorsally and ventrally on each segment, with numerous long, erect, pale setae up to two times diameter of respective segments. Pronotum : Pale yellowish brown, holotype without small red spots, most paratypes with four small red spots across calli, with numerous short, pale setae. Scutellum : Pale yellow with a few small red spots. Hemelytron : Claval and corial cells clear, veins and apex of corium yellowish brown, with vague brown spots ; membrane clear. Ventral surface : Pale yellowish brown, with or without a few scattered, tiny red spots, less so on thorax. Legs : Pale yellowish brown; femora with numerous, small, pale brown spots, some coalescing into larger spots; tibiae with small, pale brown spots. Male genitalia : Paramere ( Fig. 11A ): Broadly rounded on outer side, more flattened on inner surface, with a blunt denticle apically. Median lobe ( Fig. 11A ): Shorter than parameres, quadrate distally, flat dorsally, without lateral processes. Lateral lobe ( Fig. 11B ): Extending higher than parameres; relatively slender and apically rounded in lateral aspect.