Eutolmus brevistylus ( Coquillett, 1898 )

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 : 7-9

Eutolmus brevistylus ( Coquillett, 1898)

( Figs 4 , 16 , 32, 33 & 61 )

Asilus brevistylus Coquillett, 1898 Coquillet (1898: 314) . = Eutolmus ussuriensis Engel, 1928: 148 .

Medium to large sized brown flies, 20 to 27mm. 4­6 strong, stout ventral spines on the anterior femur. Tibia reddish yellow. Male sternite 8 greatly elongated medially with long yellow or black hair. Gonostylus with a medio­ventral arch ( Fig.16 ) (more pronounced than in E. koreanus ). Aedeagus long and slender, trifid apices flared and tapered ( Figs. 32, 33 ). Female sternite 8 angled upwards; cercus embedded into tergite 9, sharp at distal apex ( Fig. 61 ).

Head: Mystax with long yellowish white hair below, shorter black hair along facial grooves. Thorax: Chaetotaxy with 1 posthumeral bristle; 2 notopleural; 3 supraalar; 3 postalar, 5 dorsocentral bristles. Scutellum yellow pollinose with black or yellow short erect hair; 4 marginal bristles. Pleura yellow gray pollinose, yellow and black hair. Legs: Femora black with yellow and black hair and black bristles, fore femur with 4 6 conspicuous stout, sharp ventral spines; tibia reddish orange, black at apices with yellow and black hair, black bristles. Wings: Entire wing tinged brown. Abdomen: Tergites gray, fine appressed gold and black tomentose; post lateral bristles on tergites 1­4. Gonostylus with a medio­ventral arch ( Fig. 16 ) (more pronounced than in E. koreanus ).

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. Kunsan. Wolmyong Park. 35°57’93”N, 126°41’78”E. Sŏnyudo Is. Okto­Myon. 35°49’18”N, 126°24’47”E. Ch’ungch’ ǒ ngbuk­Do Province. Okcheon. Saesan­Li. 36°16’36”N, 127°36’42”E. Ch’ungch’ ǒ ngnam­Do Province. Chungnam. Kŭmsan. Yangsan­Myon (no coordinates available). Kang­won­Do Province. Ch’unchŏn. Nam­Myon. Hudong­Li. 37°44’31”N, 128°35’41”E. Ky ǒ ngsangnam­Do Province. Samjeong­Li. Macheon. Chiri Mt. 6– 800m. 35°21’36”N, 127°38’25”E. Pijindo Is. (no coordinates available).

Material examined. 1Ψ: 25/VI/2004, Chŏllabuk­Do Province, Iksan Shi, Mirŭksan; 1ɗ, 1Ψ (in cop): 15/VI/2000, Chŏllabuk­Do Province, Kunsan, Umpa Lake; 1ɗ, 1Ψ (in cop): same data except 14/VII/1999; 13ɗ, 13Ψ: same data except 6/VI–14/VII 1999–2000; 5ɗ, 5Ψ (in cop.): 22/VI/1998, Chŏllabuk­Do Province, Kunsan, Wolmyong Park; 17ɗ, 11Ψ: same data except 22/VI–17/VII/1998; 3ɗ, 3Ψ: 1/VIII/2003, Chŏllabuk­Do Province, Sŏnyudo Is. Okto­Myon; 3Ψ: 14/VI/2003, P. Tripotin coll., Ch’ungch’ŏngbuk­Do Province, Okcheon, Saesan­Li; 2ɗ, 1Ψ: 30/VI/2002, P. Tripotin coll., Ch’ungch’ŏngnam­ Do Province, Chungnam, Kŭmsan, Yangsan­Myon; 1Ψ: same data except 4/VIII/1998; 1ɗ: same data except 12–14/VIII/1998, Malaise trap; 1Ψ: 6–31/VII/2003, P. Tripotin coll., Kang won Do Province, Chunchŏn, Nam­Myon, Hudong­Li, Malaise trap; 2Ψ: 25/V/ 2003, P. Tripotin coll., Kyŏngsangnam Do Province, Samjeong­Li, Macheon, Chiri Mt. 6 – 800m.; 1ɗ: same data except 21–2/VI/2002; 1ɗ: 7/VI/1997, P. Tripotin coll., Kyŏngsangnam­Do Province, Pijindo Is.

Field notes. Both species of Eutolmus are widespread in South Korea and occupy sympatric and allopatric habitats. In addition, there is a seasonal overlap.

Eutolmus koreanus Hradsk ý & Hüttinger, 1985 ( Fig 17 )

Eutolmus koreanus Hradskÿ & Hüttinger 1985 — Hradskÿ & Hüttinger (1985:170).

Medium to large sized brown flies, 20 to 28mm. Long ventral hair on anterior femur. Tibia black. Male gonostylus with a slight medial arch ( Fig. 17 ) (less pronounced than in E. brevistylus ). External genitalia of male and female almost identical to E. brevistylus .

Similar to E. brevistylus except: Legs: Femora black with yellow and black hair and black bristles; anterior femur with long black and yellow ventral hair; tibia black with yellow and black hair and black bristles.

South Korean distribution. Ch ǒ llabuk ­Do Province. Impi­Myŏn. Kunsan­Shi. 35°37’93”N, 126°41’78”E. Sŏngsusan Mt. Resort area. Sŏngsu­Myŏn. 35°38’26”N, 127°24’42”E. Pyŏngsanbando N. P. Puan­Gun. 37°44’57”N, 128°34’19”E. Taedunsan Prov. P. 36°05’00”N, 127°20’00”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. Chungch ǒ ngnam­Do Province. Kŭmsan­Gun. Kŭmsan. Posoksa (no coordinates available). Kang­won­Do Province. Chunchŏn. Nam­ Myon. Hudong­Li. 37°44’31”N, 128°35’41”E. Ky ǒ nggi­Do Province. Seoul. Pukansan N. P. (no coordinates available). Ky ǒ ngsangbuk­Do Province. Kimchŏn­Shi. Kimchŏn 400m. (no coordinates available). Ky ǒ ngsangnam­Do Province. Samjeong­Li. Macheon. Chirisan Mt. 6– 800m. 35°21’36”N, 127°38’25”E.

Material examined. 3ɗ: 30/VII/1998, Chŏllabuk­Do Province, Impi­Myŏn, Kunsan­ Shi; 6ɗ, 5Ψ: 24/VI–10/VII/2004, Chŏllabuk­Do Province, Iksan­Shi, Mirŭksan; 6ɗ, 10Ψ: 26/VII–21/VIII/1998 2000, Chŏllabuk­Do Province, Sŏngsusan Mt. Resort area, Sŏngsu­ Myŏn; 3ɗ, 5Ψ: 20/VII/2001, Chŏllabuk­Do Province, Pyŏngsanbando N. P., Puan­Gun; 6ɗ, 4Ψ: same data except 3/VIII/2000; 7ɗ, 2Ψ: same data except 5/VIII/1999; 2ɗ, 2Ψ: 6/ VIII/1999, Chŏllabuk­Do Province, Taedunsan Prov. P.; 11ɗ, 7Ψ: 16/VII–1/IX/1999 2004, Chŏllanam Do Province, Chirisan N.P., Piagol Valley, Chiri Mt. 570 m.; 1ɗ: 28/VI/ 2002, P. Tripotin coll., Ch­ungch­ŏngbuk­Do Province, Okcheon, Saesan­Li; 1Ψ: same data except 14/VI/2003; 1ɗ: 29/IX/2002, P. Tripotin coll., Ch­ungch­ŏngnam­Do Province, Kŭmsan­Gun, Kŭmsan, Posoksa; 12ɗ, 1Ψ: 6–31/VII/2003 P. Tripotin coll., Kang­won­Do Province, Chunchŏn, Nam­Myon, Hudong­Li, Malaise trap; 4ɗ, 3Ψ: same data except 31/VII–16/VIII/2003; 4ɗ, 1Ψ: 15/VI/1995, Kyŏnggi­Do Province, Seoul, Pukansan N. P.; 3ɗ: 28/VI/2002, Kyŏngsangbuk­Do Province, Kimchŏn­Shi, Kimchŏn 400m., 13ɗ, 1Ψ: 2/VIII–15/IX/2002, Kyŏngsangnam­Do Province, Samjeong­Li, Macheon, Chirisan Mt. 6– 800m.

Field notes. Both species of Eutolmus are widespread in South Korea and occupy sympatric and allopatric habitats. In addition, there is a seasonal overlap.

Figures

FIGURES 1 – 12. Male external genitalia, lateral views. 1. Aneomochtherus sinensis. 2. Asilella londti. 3. Astochia virgatipes. 4. Eutolmus brevistylus. 5. Machimus aurulentus. 6. Machimus cf. pastshenkoae 7. Mercuriana ussuriensis. 8. Neoitamus angusticornis. 9. Neoitamus castaneipennis. 10. Neoitamus cothurnatus univittatus. 11. Neoitamus zouhari. 12. Philonicus albiceps. Scale bar = 1 mm.

FIGURES 13 – 25. Male gonopods, lateral views. 13. Aneomochtherus sinensis. 14. Asilella londti. 15. Astochia virgatipes. 16. Eutolmus brevistylus. 17. Eutolmus koreanus. 18. Machimus aurulentus. 19. Machimus cf. pastshenkoae. 20. Mercuriana ussuriensis. 21. Neoitamus angusticornis. 22. Neoitamus castaneipennis. 23. Neoitamus cothurnatus univittatus. 24. Neoitamus zouhari. 25. Philonicus albiceps. Scale bar = 1 mm.

FIGURES 26 – 48. Male aedeagi, lateral and dorsal views. 26 – 27. Aneomochtherus sinensis lateral & apex. 28 – 29. Asilella londti lateral & apex. 30 – 31. Astochia virgatipes lateral & apex. 32 – 33. Eutolmus brevistylus lateral & apex. 34 – 35. Machimus aurulentus lateral & apex. 36 – 37. Machimus cf. pastshenkoae lateral & apex. 38 – 39. Mercuriana ussuriensis lateral & apex. 40 – 41. Neoitamus angusticornis lateral & dorsal. 42 – 43. Neoitamus castaneipennis lateral & dorsal. 44. Neoitamus cothurnatus univittatus lateral. 45 – 46. Neoitamus zouhari lateral & dorsal. 47 – 48. Philonicus albiceps lateral & apex.

FIGURES 58 – 66. Female external genitalia, lateral views. 58. Aneomochtherus sinensis. 59. Asilella londti. 60. Astochia virgatipes. 61. Eutolmus brevistylus. 62. Machimus aurulentus. 63. Machimus cf. pastshenkoae. 64. Mercuriana ussuriensis. 65. Neoitamus angusticornis. 66. Philonicus albiceps.