Pupal cases of Nearctic robber flies (Diptera: Asilidae) Author Dennis, D. Steve Author Barnes, Jeffrey K. Author Knutson, Lloyd text Zootaxa 2008 2008-09-03 1868 1 1 98 https://biotaxa.org/Zootaxa/article/view/zootaxa.1868.1.1 journal article 10.11646/zootaxa.1868.1.1 1175­5334 5133591 Machimus erythocnemius (Hine) The pupal case of female M. erythocnemius was described by Scarbrough & Kuhar (1995) based on specimens from the United States National Museum. They indicated that the pupal cases are similar to M. paropus , but have wider spacing between the second and third posterior antennal processes. Abdominal segment 1 has 11 or 12 spurs. Segments 2–7 have alternating long spurs and short spines, and segment 8 has 6 "setae." M. paropus pupal cases have spaces between the posterior antennal processes that are equal or subequal. Abdominal segment 1 has 10 dorsal spurs. Long dorsal spurs alternate with pairs of short spines on segments 2–7, and segment 8 has only 2 dorsomedian bristle­like processes.