Andesobia jelskii

Andesobia jelskii is a species of moth of the subfamily Arctiinae first described by Charles Oberthür in 1881. It is found in the Department of Junín in Peru.

Andesobia jelskii
Male
Living male
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Superfamily:	Noctuoidea
Family:	Erebidae
Subfamily:	Arctiinae
Genus:	Andesobia
Species:	A. jelskii
Binomial name
Andesobia jelskii (Oberthür, 1881)
Synonyms
Arctia jelskii Oberthür, 1881 Phragmatobia jelskii Mallocephala imitatrix Rothschild, 1922 Mallocephala imitatrix ab. griseola Rothschild, 1922 Mallocephala imitatrix ab. luteola Rothschild, 1922

Adult

The forewings of the males have a length of 8–12 mm. The ground colour is brownish grey with a yellowish-ochre costal band varying to entirely dark brownish grey or pale ochre grey. There is an indistinct black discal spot, but other markings are obsolete. The hindwing ground colour is yellowish ochre with a broad, diffusely bordered grey-brown marginal band over the distal third of the wing, varying to entirely dark brownish grey. The forewings and hindwings of the females are micropterous (vestigial-winged) and highly reduced.

Egg

The egg is almost spherical, with the poles only very weakly flattened. It is ivory white changing to dark greyish white prior to hatching.

Larva

First-instar larvae are initially translucent white, becoming opaque white. The second instar integument is black and the third instar has jet-black setae. The verrucae of the fourth instar are more pronounced than in previous instar. When mature, female larvae are about twice as large as male larvae.

Pupa

The cocoon is spherical to ovoid, reddish brown to dull brown, consisting of a single, thin and flimsy layer with incorporated larval setae.

Biology

First-instar larvae initially feed on the tissue of the dead or dying female, then leave the cocoon in search of plant material. Duration of the first instar is six days, second instar five to six days. The larvae are probably polyphagous and have been reared on Taraxacum and Poa species. The larvae emit an unpleasant odour of decay when disturbed. The cocoons are spun between leaves of the food plants near the ground. Adults emerge in the morning, with relatively fast expansion of the wings. Females remain in the loosely spun cocoon, and presumably emit mating pheromones from within the thin cocoon soon after emerging from the pupa, because males dig through the loose silk webbing to enter and mate inside the cocoon. The pair remains in copula for several hours, after which the male leaves the cocoon, and the female deposits about 50 eggs inside the cocoon.

Males are diurnal and fly rapidly during sunny periods. The flight period is early in the year (January), in the middle of the four-month wet season.

Gallery

• 
  Female: lateral aspect (13a) and dorsal aspect (13b)
• 
  Female pupa
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  Mature larva
• 
  Dark form of mature larva
• 
  Male (lower arrow) and female (upper arrow) in copulo inside cocoon of female

References

 This article incorporates text by B. Christian Schmidt and Josef J. De Freina available under the CC BY 4.0 license.