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Classification
Lygistorrhina pictipennis Okada, 1937
- Distribution after:
Lygistorrhina pictipennis (after Okada, 1937)
Diagnostic description:This species differs from the related species Lygistorrhina cincticornis EDWARDS (1926) from Borneo by the following points:
1.Body smaller, only 5 mm long.
2.Wings with different pattern.
3.Flagellomeres 7th-10-and 13th - 15th of the antenna blackish brown, flagellomeres longer than wide.
4.The fore basitarsus almost 2.5 times as long as the fore femora.Morphology:Male. Ground color blackish brown. Head, thorax and abdomen black, with the exception of the yellow front edge of each abdominal segment, all coxae except the yellow base the fore coxa, the top half of the hind legs, top of the rear rails and tarsi blackish brown. Legs with the exception of the bright yellow front half of the hind leg and hypopygium gray to dirty yellow. Antenna yellow, the 7th -10th and 13th-15th-flagellomeres blackish.
Head large and round, wider than the thorax. Proboscis, which consists of the 2 outer and 3 inner segments long and slender, reaching almost to the 4th abdominal. Eyes very large, narrowly separately from each other, lateral ocelli near the edge of compound eyes.
Thorax. Mediotergite small and round, without long bristles, scutellum very small, bald again without bristles, and pleura metonotum bare.
Wings brown, with 3 complex brown spots with the first spot is near the wing tip, the second to M2, and Cu1 and Cu2, the 3rd in the anal cell. Halters yellow. Wings long and slender, microscopically hairy. The C reaching the wing tip, Sc very weak and ending free; R1 ends before the middle of the wing, R5 long and slightly wavy; M1 and M2 diverging at apex, the basis of M absent; Cu1 at the base also missing, Cu2 in the tip strongly curved inward.
Legs long and slim, their hair is very tiny and small. Fore and mid legs very delicate, without spurs; fore tarsus strikingly long, 2.5 times as long as half the front femora, hind tibia long and strong, without long hair, but with short spurs.
Abdomen long, slender, densely hairy; hypopygium slender, with thin and delicate gonistyli.Size:Body length: 5 mm.
Lygistorrhina pictipennis, distribution map
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