VALANGA NIGRICORNIS JAVANICA
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Species V. Nigricornis
Subspecies V. N.Javanica
VALANGA NIGRICORNIS JAVANICA GRASSHOPPER
Valanga nigricornis, the Javanese grasshopper, is a species of grasshopper in the subfamily Cyrtacanthacridinae of the family Acrididae. It is found in southeastern Asia, the type location being Singapore. It was first described by the German zoologist Hermann Burmeister in 1838. There are about 18 subspecies, most of which are endemic to different island groups .
There is considerable sexual dimorphism in this species with the males measuring 45 to 55 millimetres in length and the females 15 to 75 mm . The adults are yellowish-brown, yellowish or green with bluish-black markings. The hind wings, which are visible in flight, are rose red. The nymphs are pale green with dark markings.
The Javanese grasshopper is native to southern Thailand, Malaysia, Indonesia and the Philippines. It is mainly a woodland species and is found in forest clearings, on trees and shrubs. It can be a serious pest in oil palm and rubber plantations.
Javanese grasshopper has one generation every year where four eggs are placed on moist soil in forest clearing. The eggs are not active throughout the dry season and it takes six to eight months to hatch.The eggs hatch into nymphs and pass seven instar stages before becoming winged adults.
V. nigricornis is used as a source of protein in Gunungkidul Regency, Yogyakarta Province, Indonesia, and inspiration for various traditional batik patterns. On the other hand, this grasshopper is a pest in several plantation areas and production forests.