901 Accepted by C. Schaefer:3 Mar. 2005; published: 14 Mar. 2005 1 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2005 Magnolia Press Zootaxa 901: 1–6 (2005) www.mapress.com/zootaxa/ Dushinckanus mesopotamicus, a new species of Myodochini from Argentina (Heteroptera: Lygaeoidea: Rhyparochromidae) PABLO MATÍAS DELLAPÉ & MARÍA CECILIA MELO División Entomología, Museo de Ciencias Naturales de La Plata, UNLP, Paseo del Bosque s/nº, 1900 La Plata, Buenos Aires, Argentina pdellape@museo.fcnym.unlp.edu.ar Abstract Dushinckanus mesopotamicus, a new myrmecomorphic species from Argentina, is described. The male genitalia are described and illustrated and the phylogenetic relationships of the genus are dis- cussed. Key words: Rhyparochromidae, Myodochini, Dushinckanus mesopotamicus, new species, Argen- tina Introduction The genus Dushinckanus was erected by Brailovsky in 1979 to include an ant mimetic species, D. ocellatus, from Brazil. In 1981 the same author described another species, D. crassicornis, from Guatemala. Harrington (1987) revised the genus and described two new species, D. ashlocki from Brazil and D. camelopardus from Ecuador, and transferred Myo- docha inermiba Distant to this genus. In this contribution we describe a new species from Argentina, and thereby extend the geographic distribution of the genus. Illustrations were made with a camera lucida on a Wild M-5 stereomicroscope. The photograph was taken with an Olympus C4000 digital camera attached to a Leyca Wild M3Z binocular stereomicroscope and the scanning electron micrographs with a Jeol 6360 LV. Measurements are given in millimetres.