Machimus pastshenkoae Lehr 1976
Creators: name: Young, Charles L.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Machimus
Machimus pastshenkoae

description: Machimus cf. pastshenkoae (Lehr, 1976)
(Figs 6, 19, 36, 37, 57 & 63)
Epitriptus pastshenkoae Lehr, 1976 — Lehr (1976: 482). Machimus pastshenkoae Lehr, 1999: 609.
Machimus cf. pastshenkoae falls closely between Tolmerus Loew, 1849 (without the excised male sternite 8) and Machimus (with a slight extension). The gonostylus also separates the genus. Machimus cf. pastshenkoae is proposed for the male’s slight sternite 8 extension with long medial hair. Lehr (1999: 609) gives the new combination Machimus pastshenkoae Lehr, into which this species may fall. In addition, Mr. Milan Hradský has indicated (pers. comm., 2005) that Machimus pastskenkoae may possibly be a synonym of Machimus arthriticus (Zeller, 1840), known from Japan. To date, the existing material has not been examined.
Small brown flies, 14 to 20mm. Distinguished from M. aurulentus by the dull brown color, smaller size, and the tibia which are pale yellow basally. Epandrial lobes obtuse (Fig. 6) as in M. aurulentus but with tapered apices. Gonostylus wide and tapered at base (Fig. 19). Aedeagus long and slender, three pronged, each prong bifid (Figs. 36, 37). Ovipositor with compressed segments 8 and 9, segment 9 short, and cercus free (Fig. 63).
Head: Face gold pollinose. Gena with two dark pollen stripes extending medially from upper gena to mid gibbosity. Upper mystax with or without black bristles at base of upper gibbosity descending ventrally on outer ridge of oral margin encircling a triangular pattern of strong yellow hair extending from upper portion of gibbosity to upper gena, along the oral margin. Palpus with dense long yellow hair. Lower occipital margin with a short dense fringe of white hair; mid occipital fringe with longer proclinate hair and shorter, finer hair basally; upper occipital fringe with strong yellow hair. Ocellar tubercle with black pollen and black posterior hair. Style sub equal in length to postpedicel; slightly swollen at sub apex, slightly tapered at apex. Thorax: Brown mesonotal stripe tapering posteriorly. Pleurae gray and gold pollinose. Dorsal anepisternum with long fine yellow hair, gold pollinose with fine hair on posterior margin. Katepisternum gold pollinose with fine yellow hair. Anepimeron with long yellow bristles. Katatergite with a vertical row of long yellow bristles. Metepimeron with 2 weak yellow bristles and fine yellow hair. Anatergite gray pollinose with fine yellow hair. Humeral callus black with short black hair. Chaetotaxy with 1 posthumeral; 2 notopleural; 3 4 supraalar; 3 postalar; 7 dorsocentral bristles. Scutellum with fine yellow proclinate hair; margin with two bristles. Legs: Coxae silver/gray pollinose with pale yellow bristles and hair. Fore femur black, yellow tomentose; anterior surface with 5 medial, 2 apical bristles; posterolateral surface with a row of 3 strong bristles; ventral surface with a row of 3–4 long yellow bristles, long pale yellow hair. Fore tibia black, basal apex pale yellow, gold tomentose; anterior surface with 2 apical bristles; anterodorsal surface with 6–7 bristles; 3 long ventral medial bristles, 3 4 apical bristles, a fringe of long yellow hair. Mid femur black, yellow tomentose; anterior surface with 5 bristles; posterolateral surface with 2 apical bristles; 2 ventral apical bristles. Mid tibia black; basal apex pale yellow; gold tomentose; anterodorsal surface with 3 medial bristles, 1 apical; 6 posterolateral bristles; ventral surface with 2–3 bristles, a fringe of long pale yellow hair. Hind femur black, gold tomentose; 8 anterior bristles; posterolateral surface with 4 bristles, a fringe of long yellow hair; 5 ventral bristles. Hind tibia black; basal apex pale yellow; other surfaces black, gold tomentose; anterior surface with 5–6 bristles; anterodorsal surface with 3 bristles; 7 ventral bristles. Tarsi black dorsally with long yellow apical bristles; black ventral bristles. Wings: Base of the second posterior cell widened, almost as wide as the end of the discal cell. Abdomen: Abdomen dark gray, gold tomentose. Tergite 1 light gray; gold medial bristles on sub apical posterior margin; long hair and bristles on lateral surfaces. Female with less hair and bristles on tergite 1. Tergite 2 darker gray, with sub apical medial and lateral bristles. Males with bristles on tergites 1 5. Females with bristles on tergites 1–4. Sternites 2–8 with long yellow hair. Male sternite 8 short, longer medially (Fig. 57), long hair apically on the medial posterior margin. Hypandrium short medially, longer laterally (Fig. 57). Epandrial lobe apex curved ventrally (Fig. 6). Gonopod short, rounded with apical crease and sharp tip (Fig. 19). Female ovipositor of compressed segments 8 and 9, short segment 9, cercus free (Fig. 63).
South Korean distribution. Ch ǒ llabuk ­Do Province. Kunsan. Umpa Lake. 35°57’93”N, 126°41’78”E. Kochang. Kochang Castle wall (no coordinates available). Sŏngsusan Mt. Resort area. Sŏngsu­Myŏn. 35°38’26”N, 127°24’42”E. Ch ǒ llanam­Do Province. Chirisan N.P. Piagol Valley. Chiri Mt. 570 m. 35°16’39”N, 127°33’91”E. Chungch ǒ ngbuk­Do Province. Okcheon. Saesan­Li. 36°16’36”N, 127°36’42”E. Ch’ungch’ ǒ ngnam­Do Province. Kŭmsan­Gun. Kŭmsan. Posoksa (no coordinates available). Chungnam. Kŭmsan. Yangsan­Myon (no coordinates available). Taejon. Chŏng­Won­Gun (no coordinates available). Kang­won­Do Province. Chunchŏn. Nam­ Myon. Hudong­Li. 37°44’31”N, 128°35’41”E. Chunchŏn­Shi. Namsan­Myon. Kangchon. 37°42’40”N, 127°35’26”E. Tonghae. East coast. Samcheok. 37°23’33’N, 129°13’34”E. 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. 2ɗ, 2Ψ (2 pairs in cop.): 16/V/1999, Chŏllabuk­Do Province, Kunsan, Umpa Lake; 2ɗ, 2Ψ (2 pairs in cop.): same data except 22/V/1999; 1ɗ, 1Ψ (in cop.): same data except 5/VI/1999; 1ɗ, 1Ψ (in cop.): same data except 6/VI/2000; 2Ψ: same data except 16/V/1999; 2ɗ, 3Ψ: same data except 24/V/2003; 1ɗ, 2Ψ: same data except 3/VI/2004; 1ɗ: same data except 5/VI/1999; 1ɗ: same data except 6/VI/2000; 1ɗ, 2Ψ: same data except 13/VI/1999; 1ɗ: same data except 15/VI/2000; 1ɗ: same data except 18/VI/1998; 1ɗ, 1Ψ: 16/VI/2002, Chŏllabuk­Do Province, Kochang, Kochang Castle wall; 1ɗ, 1Ψ: same data except 30/VI/1999; 1ɗ: 19/V/2001, Chŏllabuk­Do Province, Sŏngsusan Mt. Resort area, Sŏngsu­Myŏn; 1ɗ: 26/V/2001, Chŏllanam­Do Province, Chirisan N.P., Piagol Valley, Chiri Mt. 570 m.; 3ɗ, 3Ψ: 29/V/2004, Ch­ungch­ŏngbuk­Do Province, Okcheon, Saesan­Li; 2ɗ: 24/V/2004, Ch’ungch’ŏngnam­Do Province, Kŭmsan­ Gun, Kŭmsan, Posoksa; 1ɗ, 2Ψ: 30/VI/2002, P. Tripotin coll., Ch’ungch’ŏngnam­Do Province, Chungnam, Kŭmsan, Yangsan­Myon; 2ɗ, 1Ψ: 2/VI/1996, P. Tripotin coll., Ch’ungch’ŏngnam­Do Province, Taejon, Chŏng­Won­Gun; 1ɗ, 5Ψ: 25/V/2003, P. Tripotin coll., Kang won Do Province, Chunchŏn, Nam­Myon, Hudong­Li, Malaise trap; 1ɗ, 1Ψ: 12/VI/2004, Kang won Do Province, Chunchŏn­Shi, Namsan­Myon, Kangchon; 3ɗ, 3Ψ: 8/VI/2003, Kang won Do Province, Tonghae, East coast, Samcheok; 1ɗ: 18/V/ 2003, Kyŏngsangnam­Do Province, Macheon, Chirisan Mt. 705m.; 4ɗ: same data except 1 15/VI/2003, Malaise trap; 4ɗ, 1Ψ: 25/V/2002, P. Tripotin coll., Kyŏngsangnam­Do Province, Samjeong­Li, Macheon, Chirisan Mt. 6– 800m.
Field notes. Machimus cf. pastshenkoae inhabits perimeter thickets of open fields and burial mound areas surrounded by pine saplings and a deciduous shrub layer, where it forages and mates among fallen pine needles (its brown color blending in with dead needles), low grasses and flowering Lespedeza. The asilid appears in mid May, and is absent after late June in South Korea. Both species of Machimus are widespread in South Korea and occupy sympatric and allopatric habitats.
description: Published as part of Young, Charles L., 2006, Robber flies of South Korea — II. South Korean species of the Subfamily Asilinae Latreille, 1802 (Diptera, Asilidae), pp. 1-30 in Zootaxa 1132 on pages 11-13, DOI: 10.5281/zenodo.171900