Aularches
| Aularches | |
|---|---|
| |
| |
| Adult above (Java, Indonesia), nymph below (Kerala, South India) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Orthoptera |
| Suborder: | Caelifera |
| Family: | Pyrgomorphidae |
| Subfamily: | Pyrgomorphinae |
| Tribe: | Taphronotini |
| Genus: | Aularches Stål, 1873 |
| Species: | A. miliaris
|
| Binomial name | |
| Aularches miliaris | |
| Synonyms | |
| |
Aularches miliaris is a grasshopper species of the monotypic genus Aularches, belonging to the family Pyrgomorphidae.[2] A native of South and Southeast Asia, the bright warning colours of this fairly large grasshopper keep away predators and their defense when disturbed includes the ejection of a toxic foam.[3]
The insect has been called by a variety of names including coffee locust, ghost grasshopper, northern spotted grasshopper, and foam grasshopper, and enjoys some popularity as a pet insect.
Description
[edit]
Adult males are typically 3.7–5.5 cm (1.5–2.2 in) long and females typically 4.7–6.9 cm (1.9–2.7 in).[4] The head and thorax are dark green with a canary-yellow band on the side. The tegmina are green with many yellow spots; the legs are blue, with a yellow serrated pattern on the hind femora. The abdomen is black with bright red bands.[3]
Subspecies and distribution
[edit]There are two subspecies:[2]
- A. miliaris miliaris (Linnaeus, 1758) - India to Indo-China
- A. miliaris pseudopunctatus Kevan, 1974 - Pakistan
Habits
[edit]It swarms in October, the mating and egg-laying season, collecting on bushes and grasses. It is heavy and sluggish, able to make only short leaps, very visible on vegetation.[3] Outbreaks leading to this species damaging cultivated crops are uncommon.[5]
When A. miliaris (of either sex) is disturbed or grabbed, it emits a sharp rasping noise from its thoracic segments. If its thorax is pinched, it also squirts a clear viscous mucus with unpleasant smell and a bitter taste, faintly alkaline, with many embedded bubbles. This foam comes out as a strong jet from apertures in the thorax, and more gently from other openings in the body (ten in total); it heaps up around the insect and partly covers it.[3]
Conservation
[edit]Autarchies miliaris, like many other grasshoppers, are considered a pest in agricultural areas. The species is overall widespread and common; however it is near threatened in the Western Ghats of South India.[6] A. miliaris lays eggs in the soil which aerates the soil promoting biodiversity and creates ecosystem value. Their interactions and natural process contribute to the health of the soil. The presence of a variety of insects in the soil are indicators of soil quality.[7] There are a few conservation efforts for this species. At times of high population, growth can be controlled by tilling the area where they deposit their egg pods or collecting the grasshoppers; pesticides are effective; however they are normally not environmentally friendly and can cause damage to other animals and vegetation.[6] Lack of awareness among the residents regarding the entomofauna diversity has led to the misidentification of Autarchies miliaris as the plague causing locust species at many instances and evoked panic among local farmers.[8]
References
[edit]- ^ Kirby, W.F. (1914). The fauna of British India, including Ceylon and Burma. Orthoptera. London: Taylor and Francis.
- ^ a b (2013) Aularches miliaris, (Linnaeus, 1758) from Orthoptera Species File (OSF) Online. (retrieved 16 March 2020).
- ^ a b c d Hingston, RWG (1927). "The liquid-squirting habit of oriental grasshoppers". Transactions of the Entomological Society of London. 75: 65–69. doi:10.1111/j.1365-2311.1927.tb00060.x.
- ^ Whitman, D.; Vincent, S. (2008). "Large size as an antipredator defense in an insect". Journal of Orthoptera Research. 17 (2): 353–371. doi:10.1665/1082-6467-17.2.353.
- ^ Jones, S (1940). "A Visitation of the Spotted Locust (Aularches miliaris L.) in Travancore". Journal of the Bombay Natural History Society. 41 (3): 676–678.
- ^ a b Josephrajkumar, A.; Rajan, P.; Mohanan, R; Jacob, P (2011). "Management and conservation dilemmas surrounding a Near-Threatened grasshopper, Aularches miliaris Linn. (Orthoptera: Pyrgomorphidae) in south India". Journal of Orthoptera Research. 20 (1): 103–107. doi:10.1665/034.020.0110. JSTOR 23034227. S2CID 85574593.
- ^ Lavellea, P; Decaënsb, T; Aubertb, S; Barota, M; Bureaub, F; Margerieb, P (2016). "Soil invertebrates and ecosystem services" (PDF). European Journal of Soil Biology: S3–S15.
- ^ "(PDF) A newspaper article on the possibilities of the Desert Locust (Schistocerca gregaria) swarm entering West Bengal, India". ResearchGate. Retrieved 2021-11-23.
External links
[edit]Media related to Aularches at Wikimedia Commons
- Orthoptera Species File
