Machimus aurulentus Becker, 1925

Young, Charles L., 2006, Robber flies of South Korea — II. South Korean species of the Subfamily Asilinae Latreille, 1802 (Diptera, Asilidae), Zootaxa 1132, pp. 1-30 : 10

publication ID	https://doi.org/ 10.5281/zenodo.171900
DOI	https://doi.org/10.5281/zenodo.6257252
persistent identifier	https://treatment.plazi.org/id/03BF0D1C-800A-FFE1-8616-FED7FDEDDB0E
treatment provided by	Plazi
scientific name	Machimus aurulentus Becker, 1925
status

Treatment

( Figs 5 View FIGURES 1 – 12 , 18 View FIGURES 13 – 25 , 34, 35 View FIGURES 26 – 48 & 62 View FIGURES 58 – 66 )

Machimus aurulentus Becker 1925 Becker (1925: 249) .

Medium size, bright yellow flies, 17 to 20 mm. Easily recognized by the bright yellow setose abdomen. Epandrial lobe wide, obtuse ( Fig. 5 View FIGURES 1 – 12 ), apex in posterior view sigmoid. Gonostylus sub apically notched ( Fig. 18 View FIGURES 13 – 25 ). Aedeagus truncated with three long slender prongs ( Figs.34, 35 View FIGURES 26 – 48 ). Ovipositor of compressed segments 8 and 9, short segment 9, and free cercus ( Fig. 62 View FIGURES 58 – 66 ).

Head: Mystax with long white and yellow hair below and black, shorter hair above.

Thorax: Clearly defined dark paramedian stripe of scutum and posthumeral spots. Chaetotaxy with 6 pronotal; 3 notopleural; 3 supraalar; 3 postalar, and 6 dorsocentral bristles. Scutellum gray tomentose with sparse black proclinate hair, margin with 6 black bristles. Pleura gold pollinose with black and yellow hair. Legs: Entirely black with yellow and black hair. Wings: Wide marginal and submarginal cell rippled; entire wing tinged brown. Abdomen: Tergites bright yellow tomentose, appressed yellow hair along posterior margins of dorsal and lateral tergites 1 5. Male sternite 8 with a fringe of long yellow hair. Hypandrium reduced. Epandrial lobe wide, obtuse, apex in posterior view sigmoid. Gonostylus sub apically notched and with a median lateral tubercle ( Fig. 18 View FIGURES 13 – 25 ). Aedeagus truncated with three long slender prongs ( Figs. 34 35 View FIGURES 26 – 48 ). Ovipositor of compressed segments 8 and 9, short segment 9, and cercus free ( Fig. 62 View FIGURES 58 – 66 ).

South Korean distribution. Ch ǒ llabuk Do Province. IksanShi. Mirŭksan. 36°01’12”N, 127°01’52”E. Kunsan. Umpa Lake. 35°57’93”N, 126°41’78”E. Ch’ungch’ ǒ ngnamDo Province. KŭmsanGun. Kŭmsan. Posoksa (no coordinates available). Ky ǒ ngsangnamDo Province. Macheon. Chirisan Mt. 705m. 35°20’55”N, 127°38’21”E. SamjeongLi. Macheon. Chirisan Mt. 6– 800m. 35°21’36”N, 127°38’25”E.

Material examined. 1ɗ, 1Ψ: 6/X/2004, ChŏllabukDo Province, IksanShi, Mirŭksan; 2Ψ: 30/VIII/1998, ChŏllabukDo Province, Kunsan, Umpa Lake; 1ɗ: same data except 6/ IX/1998; 1ɗ, 3Ψ: same data except 8/IX/2004; 1ɗ: same data except 12/IX/1998; 2ɗ, 6Ψ: same data except 1/X/2002; 1ɗ: 10–14/IX/1998, P. Tripotin coll., Ch’ungch’ŏngnamDo Province, KŭmsanGun, Kŭmsan, Posoksa, Malaise canopée; 1ɗ: same data except 29/IX/ 2002; 1ɗ, 1Ψ: 6/IX/2003, P. Tripotin coll., KyŏngsangnamDo Province, Macheon, Chirisan Mt. 705m.; 3ɗ: same data except 27/IX/2003; 2ɗ: same data except 4/X/2003; 4ɗ: 24/VIII/2002, P. Tripotin coll., KyŏngsangnamDo Province, SamjeongLi, Macheon, Chirisan Mt. 6– 800m.; 1ɗ, 1Ψ: same data except 24/VIII/2002, From Malaise Trap; 2ɗ, 1Ψ: same data except 20/X/2002.

Field notes. Machimus aurulentus inhabits perimeter thickets of open fields and burial mound areas surrounded by pine saplings and a deciduous shrub layer where it forages from grass stalks and leaves. The asilid appears in late August to mid October in South Korea. Both species of Machimus are widespread in South Korea and occupy sympatric and allopatric habitats.