Antocha (Antocha) gracillima Alexander, 1924

Podenas, Sigitas & Byun, Hye-Woo, 2013, Antochini crane flies (Diptera: Limoniidae: Limoniinae) of Korea, Journal of Species Research 2 (2), pp. 167-184 : 175

Antocha (Antocha) gracillima Alexander, 1924

Alexander, 1925a: 67; Alexander, 1954: 289; Savchenko and Krivolutskaya, 1976: 111; Savchenko, 1983: 106; Torii, 1992b: 175.

General coloration brownish gray, but some specimens are obscure yellow. Body length of male 4.2-6.0 mm, that of female 6.7-8.8 mm. Wing length of male 5.0-8.0 mm, of female 7.1-9.3 mm.

Head dark brown, pruinose, especially densely pruinose frontally. Antenna brown, dark brown or black. Length of male antennae 1.5-1.8 mm, if bent backward extending slightly beyond wing base. Length of female antenna 2.1-2.6 mm. Both basal segments dark brown. Basal flagellar segments elongate, becoming shorter towards apex. Flagellum covered with dense whitish pubescense. Verticils shorter than respective segments, just slightly extending beyond pubescense. Rostrum yellowish brown to brownish black in some individuals. Palpus dark brown to brownish black.

Thorax covered with pruinosity. Pronotal scutum yellowish brown to dark brown, laterally yellowish. Mesonotal prescutum yellowish brown, brownish gray, brown or dark brown, slightly paler laterally and with three hardly distiguishable dark brown longitudinal stripes. The middle stripe nearly reaches frontal margin of prescutum, where it becomes wider. Mesonotal scutum slightly darker than prescutum, brown to dark brown, paler laterally. Scutellum brown to dark brown with indistinc narrow yellowish median line which fades posteriorly. Often median line totally missing. Mediotergite brown to dark brown, sometimes with indistinct lighter lateral spots. Laterotergite reddish brown with dark brown markings. Pleura generally brown and vaguely pruinose, dorsally paler. Wing ( Fig. 1D ) grayish subhyaline, whiten- ed basally. Stigma distinct, dark brown with fuzzy margins. Stem of haltere light gray, base yellowish, knob darkened distally. Coxae yellow to brownish testaceous, mesal surfaces lighter. Frontal pair darkened except distal part. Trochanters obscure yellow to yellowish brown. Femur light brown with yellow to yellowish brown base. Specimens in ethanol could have faded entirely yellow femorae. Tibiae brown. Tarsus brown basally turning dark brown distally. Claw with a single subbasal spine.

Abdomen yellowish brown to dark brown. Basal abdominal tergites reddish brown, distal tergites dark brown. Basal abdominal sternite brown, second and third sternites yellowish with darkened posterior margin, remaining sternites dark brown. Male genitalia ( Fig. 2D ) reddish brown. Outer gonostylus distinctly darkened, bearing apical tooth. Ovipositor ( Fig. 3E ) with cercus long and narrow, distinctly longer than hypogynial valvae, smooth ventrally, distal end rounded.

Flight period. lasts from late April through early August in Korea.

Habitat. Adults are flying at edges of fast running medium-sized rivers with rocky bottoms. They are also attracted to light.

Distribution. Described from Japan ( Alexander, 1924), later found in Far East of Russia ( Savchenko, 1983) and South Korea ( Torii, 1992b). Collected from the elevation 200-800 m in Korea.

Examined material. 6 JJ, 1 ¥, South Korea, Jeollabuk-do province, Piagol village, Piagol valley, mountainous stream, N35.26586, E127.58090, altitude 448 m, 2012.04.27, coll. S. Podenas, entomological net; 2 JJ, 2 ¥¥, South Korea, Gyeongsangnam-do province, Samjeong village , swift rocky stream, N35.30246, E127.63439, altitude 640 m, 2012.04.28, coll. S. Podenas, entomological net; 1 J, South Korea, Gangwon-do province , Odaesan National Park , N37.73920, E128.59398, altitude 794 m, 2012.06.22, coll. S. Podenas, entomological net; 1 ¥, South Korea, Gangwon-do province , Pyeongchang-gun , Jinbu-myeon , Dongson-ri , near the entrance to Odaesan National Park , agricultural fields, N37.71187, E128.60077, altitude 633 m, 2012.06.22, coll. S. Podenas, at light. Also compared with the Japanese specimens including the Holotype, 1 J, Japan, Mt. Wakasugi , Chikuzen, Kiushiu, 1924.05.19, coll. H. Hori; metatype, 1 J, Japan, Kyushu, Sobosan (Bungo), 1931.08.02, coll. K. Yasumatsu; metatype, 1 J, Japan, Mt. Daisen , Hoki, 1931.07. 02, coll. Tokunaga; metatype, 1 J, Japan, Mt. Daisen , Tottori, Honshu, 1931.07.21, coll. Tokunaga; metatype, 2 JJ, Japan, Shikoku, Omogokei, altitude 800 m, 1952. 07.28, coll. Ishihara; metatype, 1 J, Japan, Shikoku, Sugitate Iya, 1953.04.27, coll. K. Baba; metatype, 1 J, Japan, Kurokawa, Echigo, 1954.06.08, coll. Kintaro Baba; metatype, 1 specimen with broken abdomen, Japan, Kurokawa, Echigo, 1954.06.10, coll. Kintaro Baba; metatype, 1 J, Japan, Kurokawa, Echigo, 1955.04.27, coll. Kintaro Baba; metatype, 1 J, Japan, Kurokawa, Echigo, altitude 200 m, 1955.07.12, coll. Kintaro Baba.

Previous records for Korea. 1 J, South Korea, Sesokpyongjon, Jiri-san , Hamyang-gun , Gyeongsangnam-do, 1983.06.05, coll. S. Uchida ( Torii, 1992b) .

Note. Korean specimens generally are bigger than those collected in Japan (compared with data from Torii, 1992b).

Figures

Fig. 1. Wings of Antocha (Antocha). A. A. (A.) bifida. B. A. (A.) dentifera. C. A. (A.) dilatata. D. A.(A.) gracillima. E. A. (A.) integra.

Fig. 2. Male genitalia of Antocha (Antocha). A. A.(A.) bifida. B. A.(A.) dentifera. C. A. (A.) dilatata. D. A.(A.) gracillima. E. A. (A.) integra, outer gonostylus, posterior view. F. A.(A.) integra. A, B, C, D, F. dorsal view.

Fig. 3. Ovipositor of Antocha (Antocha). A. A. (A.) bifida. B. A. (A.) bifida, tip of cercus. C. A. (A.) bifida, distal part of hypovalvae. D. A. (A.) dentifera. E. A. (A.) gracillima. F. A. (A.) integra. G. A. (A.) integra, ventral view. A, D, E, F. lateral view.