여울알락방울벌레
Dianemobius furumagiensis (Ohmachi and Furukawa 1929)

몸길이는 약 8-11 ㎜이며 알락방울벌레와 비슷하나 약간 더 크고 넓적하다. 후퇴절 외측에 3 줄의 뚜렷한 흑백무늬가 있고 작은턱수염 끝은 희다. 암컷의 앞날개 기부는 뚜렷하게 흰 빛을 띤다. 산지 길가의 돌이나 바위 틈, 계곡의 물이 마른 자갈 밑에서 발견된다. 석회암 지대에서 주로 나타난다. 일본, 중국, 대만에도 분포한다.

수컷 (Male) 

Original description:
Nemobius furumagiensis Ohmachi and Furukawa 1929 Proc. Imp. Acad. 5: 374.

  General appearance brownish black or almost black; it has almost the same pattern as nigrofasciatus. Body slender and of medium size for the genus, having characteristics of N. bicolor group. Head small, narrower than the pronotum, with four pale stripes. Compound eyes ovoidal and projecting. Antennae brown, slender, about twice as long as the body. Scape large, black together with the last two segment of maxillary palpi with blunt angle. The last two segments of the same and the last one of labial palpi white. Clypeus narrow; frontclypeal suture straight. Antacoria narrow. Thorax. Pronotum trapeziform broadened towards the posterior end (a special character in Nemobius), with long hairs. Lateral lobe almost as deep as long. Meso- and metasternum broad. Wings. Elytra ♂ shorter than the abdomen, over one third of caudal femora, basal side white; antero-external angle protruded; venation peculiar. Diagonal vein wavy, meeting with oblique vein at a pont. Tympanum large, long; postero-external cell narrow. Axillary vein bifurcate; apical area narrow. Anal vein at right angles to the longitudinal axis of the body. ♀ far shorter than the abdomen, posterior end truncate, basal half white; veins all very simple, subparallel. Alae in ♂ absent, in ♀ present or absent, if present, twice as long as elytra. Legs slender and with hairs. Cephalic legs: tympanum long, elliptical; basal half and a spot at tips of femur white; tips of tibiae white; tarsi brown and white. Middle legs: colored as the cephalic legs. Coxa and trochanter of both legs white. Caudal legs: femur swollen, but under margin nearly straight, white with three black patches, one situated at the distal end. (In some specimens the lower two patches are united). Tibiae; a white spot at distal and proximal ends; spine formula: ♂ E 3.1.II/ I 4.0.II., ♀ E 3.1.II/ I 3.0.II. Tarsi; first segment longer than the second and the third together, brown and white; tarsal spine very variable in length. Abdomen. Supre-anal plate paraboidal. Subgenital plate trapeziform. Cerci long, furnished with hairs, with a pale marking slightly below the middle. Ovipositor short, lanceolate; upper margin of the apex furnished with about ten fine denticles.
  Measurements.

  Types. Holotype, ♂ in alcohol; Allotype, ♀ in alcohol with ♂♂ and ♀♀ paratypes in alcohol and dry. All were collected at Furumagi by the senior author, but some specimens were obtained from the eggs hatched by him. (Holotype and allotype with a few paratypes in collection Furukawa's, the other paratypes in Ohmachi's.)
  Habitat and Habits. It is interesting to note that this new species lives only under pebbles on the railroad track, as far as we are aware. The senior author noticed a peculiar chirp at the Furumagi Railway Station, Aomori Prefecture, in August 1926, and there he collected them in the same month of 1927 and of 1928. He heard them sing at other stations in northern Japan and near Tokyo.
  The song of this species is high pitched and shrill, totally different from other members of the genus, which utter monotonous ze∼∼∼ze∼∼∼all alike. On this respect, nigrofasciatus is distinguishable from the present species, though they resemble each other in coloration. N. flavoantennalis has also a beautiful music for the genus which reminds one of the noted song of Paratrigonidium bifasciatus of the subfamily Trigonidiinae. Particularly noteworthy is it that both flavoantennalis and the present species seem to belong to the bicolor group.
  Comparison. N. nigrofasciatus resembles the present species in coloration and in the number of spines on the caudal femur. In all other details, they are divergent. N. kimurae of Formosa seems to have more resemblance (its females has not been described, so that it is very difficult to make complete comparisons), but differences are observed in those points of kimurae: body smaller, only 5.5 ㎜ in length; head wide and short; compound eyes not so much protruded; antenna shorter, only as long as the body; pronotum rectangular; lateral lobe longer than wide; male tegmen reaches the end of the body, basal side not white, its venation is different; only two black markings on the caudal femur; 4:4 (or 3:4) spines on the caudal tibia. From the above differential characters the present species, Nemobius furumagiensis, seems to be a good species new to science.

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