Arsacia

Arsacia is a monotypic moth genus of the family Noctuidae. Its only species is Arsacia rectalis. Both the genus and species were described by Francis Walker, the genus in 1866 and the species in 1863. It is found from the Indo-Australian tropics of India, Sri Lanka to Queensland and the Solomon Islands.

Arsacia
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Lepidoptera
Family:
Noctuidae
Genus:
Arsacia

Walker, [1866]
Species:
A. rectalis
Binomial name
Arsacia rectalis
(Walker, 1863)
Synonyms
  • Generic
    • Amblyzancla Turner, 1936
    • Midea Walker, 1863
    • Notocyma Snellen, 1872
  • Specific
    • Midea rectalis Walker, 1863
    • Arsacia saturatalis Walker, [1866]
    • Notocyma pruinosa Snellen, 1872
    • Arsacia frontirufa Swinhoe, 1885
    • Amblyzancla declivis Turner, 1936

Description

Palpi porrect (extending forward), where the second joint thickly scaled, and third joint minute and acute. Frontal tuft absent. Antennae almost simple in male. Thorax and abdomen smoothly scaled. Tibia naked. Forewings with quadrate apex. Outer margin rounded. Inner margin lobed and with slight tufts of hair near base and at outer angle. Veins 7, 8, 9 and 10 stalked.

The wingspan is 14–18 mm. Adults have been recorded on wing in March.[1] Head and thorax rufous. Abdomen fuscous. Forewings bright chestnut. The costa suffused with pink. There is an oblique line runs from apex to middle of inner margin, the area beyond it suffused with pink and with indistinct sub-marginal and marginal series of patches of dark scales. Hindwings dark fuscous.[2]

Biology

The larvae feed on the young leaves of Dalbergia species. They form a shelter from two leaves tied together with silk. The larvae are darkish grass green with a yellowish-green head. Pupation takes place in a loose silken cocoon that incorporates detritus.[3]

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References
  1. "rectalis (Walker, 1863)". (21 May 2009). Noctuidae.de. Retrieved 13 January 2019.
  2. Hampson, G. F. (1894). The Fauna of British India, Including Ceylon and Burma: Moths Volume II. Taylor and Francis – via Biodiversity Heritage Library.
  3. The Moths of Borneo


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