Agrias

 

 

The species of the genus Agrias have, variously, very bright red, orange, iridescent blue and yellow colouration contrasting on the black or bluish background of their upperside wing. The underside wings are patterned. They have a robust appearance (broad thorax and short wide abdomen) allowing fast flight. The wingspan is 70–120 mm. Males of all Agrias species have prominent yellow tufts of androconial scales on the hindwings. These disperse pheromones for attracting suitable mates.

Adult Agrias live in the forest canopy, occasionally visiting the forest floor to feed on decomposing fruit. The butterflies always feed and rest with their wings closed, but if disturbed they may give a rapid flick of the wings, displaying the vivid colours of the upperside. Males establish territories and perch on tree trunks, branches, and even the ground.

Agrias larvae feed on Erythroxylum. The smooth and round eggs are laid singly on the leaves of the food plant. The larvae are pale brownish, marked with lichen-green spots, have recurved "horns" on the head capsule and a bifid tail. They feed at night and spend the day on twigs. The pupa is pale green. It has a dorsal hump, and tapers sharply toward a stout cremaster and the bifid head. It is suspended from a stem or leaf of the food plant.

 

Agrias are found in both lowland and montane tropical wet forests. Adults of Agrias amydon are also found in pasture habitats in the wet season but probably pass most, or all, of the long dry season in forest refugia. During the dry season, strong-flying A. amydon undoubtedly forage in open areas, only to return to sheltered retreats in response to thermal stress.

Agrias phalcidon is a Müllerian mimic with the Asterope (formerly Callithea) species complex.

Clade showing phylogenetics of Agrias.

• Prepona × sarumani was described by Paul Smart in 1976 is considered to be a hybrid between Prepona praeneste abrupta and Agrias claudina lugens. Intergeneric hybrids are rare and this may indicate Prepona is very closely related to Agrias or that the genera should be combined.

The following species are accepted by the Atlas of Neotropical Lepidoptera.^[2]

• Agrias aedon – Aegon agrias
• Agrias amydon – white-spotted agrias
• Agrias claudina (including A. sardanapalus) – Claudina agrias
• Agrias hewitsonius
• Agrias narcissus

Other authors differ, for instance in regarding A. narcissus as a subspecies of A. aedon.

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  Agrias amydon phalcidon upperside
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  Agrias narcissus narcissus both sides
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  Agrias claudina claudina both sides
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  Agrias claudina wachenheimi upperside
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  Agrias claudina satanas underside

• Barselou, P. (1983), The genus Agrias (Nymphalidae) , Sciences Nat, Venette. [1]
• Le Moult, 1931–1933, Formes nouvelles ou peu connues d'Agrias. Novitates Entomologicae
• Floquet, Ph., 2008. Agrias, Volume 1. Publication à compte d’auteur. 98 pp accepts the same 9 species as Spath (q.v.)
• Floquet, Ph., 2010. Agrias, Volume 2. Publication à compte d’auteur. 57 pp
• Floquet, P., 2010: A new form of Agrias phalcidon Hewitson, in the Maues region, Amazonas, Brazil (Lepidoptera: Nymphalidae). Lambillionea CX 1 (Tome 1): 132–135.
• Floquet, P.,2010: Les variations chez Agrias phalcidon phalcidon Hewitson, 1855,et description de la femelle de la forme floqueti Floquet, 2010, Brésil(Lepidoptera, Nymphalidae)'Lambillionea' CXI, 3.
• Floquet, P., 2011. Les variations chez Agrias pericles Bates (1860),de la région de Maues et Itaituba au Brésil (Lepidoptera, Nymphalidae) Lambillionea CXI, 1.
• Floquet, P., 2012. Les variations chez Agrias phalcidon excelsior Lathy, 1924, Brésil(Lepidoptera, Nymphalidae)Lambillionea CXII, 1.
• Floquet, P., 2011. Les variations chez Agrias phalcidon ssp.fournierae (Fassl, 1921),au Brésil (Lepidoptera, Nymphalidae)Lambillionea CXI.
• Floquet, P., 2011. Forme rouge d’Agrias amydon smalli Miller & Nicolay (1971),du Costa-Rica (Lepidoptera, Nymphalidae)Lambillionea CXI, 1.
• Floquet, P., 2012. Les sous-espèces d’Agrias narcissus Staudinger, 1886 et leurs variations(Lepidoptera, Nymphalidae)Lambillionea CXII, 2.
• Floquet, Ph., 2012. Les sous-espèces et variations chez Agrias beatifica Hewitson, 1869 (Lepidoptera, Nymphalidae) Lambillionea CXII, 3.
• Floquet, Ph., 2012. Agrias hewitsonius Bates, 1860 (Lepidoptera, Nymphalidae) Lambillionea CXII, 3
• Floquet, Ph., 2013. Variation chez l'Agrias phalcidon phalcidon Hewitson, 1855 f. floqueti Floquet, 2010, et description de la f. manfredi nov. Floquet,2013 Lambillionea CXIII, 1
• Floquet, Ph., 2013. Forme récurrente chez les Agrias Doubleday, 1845 (Lepidoptera, Nymphalidae) Lambillionea CXIII,1
• Floquet, Ph., 2013. Decouverte et description d'unenouvelle forme d'Agrias beatifica stuarti Godman & Salvin, 1882 f. pseudohewitsonius nov.(Lepidoptera, Nymphalidae) Lambillionea CXIII,2
• Floquet, Ph., 2013. - Formes et Variations chez les Agrias (Version Française). 72 pp.
• Floquet, Ph., 2013. - Agrias, Forms and Variations (English version). 72 pp.
• Floquet, Ph., 2014. Variations chez Agrias amydon athenais Fruhstorfer,1912 et description d'une forme nouvelle auriflamma (Lepidoptera, Nymphalidae) Lambillionea CXIV,3,2014
• Floquet, Ph., 2015. Notes sur les populations d'Agrias aedon Hewitson, 1848 du Costa Rica (Lepidoptera, Nymphalidae) Lambillionea CXV,3,2015
• Floquet, Ph., 2016. Découverte et description de la forme rouge d'Agrias phalcidon excelsior Lathy, 1924, Brésil f. akai nov. Floquet, 2015 (Lepidoptera, Nymphalidae) Lambillionea CXVI,1,2016
• Rebillard, P. (1961), Révision systématique des Lépidoptères Nymphalides du genre Agrias. Memoires du Museum National d`Histoire Naturelle, Nouvelle Serie, Serie A, Zoologie, Tome XXII, Fasicule 2.
• Späth, M. (1992), Sous-espèces et formes nouvelles d'Agrias. Bulletin de la Société Sciences Nat, 75–76. [2]
• Späth, M. (1999), Pt. 2. Agrias. In: E. Bauer (Ed.), Butterflies of the World. (Vol. Nymphalidae I, pp. 12 p., 20 col. plates). Keltern: Goecke & Evers. ISBN 978-3-931374-64-8 Accepts 9 species Agrias beatifica Hewitson, 1869;Agrias hewitsonius Hewitson, 1860; Agrias sahlkei Honrath, [1885]; Agrias claudina (Godart, [1824]), Agrias aedon Hewitson, 1848; Agrias narcissus Staudinger, [1885]; Agrias amydon Hewitson, 1854, Agrias phalcidon Hewitson, 1855 Agrias pericles Bates, 1860
• Allen M. Young, 1981 Responses by butterflies to seasonal conditions in lowland Guanacaste province, Costa Rica Journal of the Lepidopterists' Society 1981 Volume 35: 155-157 pdf^{[permanent dead link‍]}
• Thomas S. Ray, 1985 The host plant, Erythroxylum (Erythroxylaceae), of Agrias (Nymphalidae) Journal of the Lepidopterists' Society 1985 Volume 39: 266-267 pdf ^{[permanent dead link‍]} includes photos of larvae and pupae
• George T. Austin, 2009 Nymphalidae of Rondônia, Brazil: Variation and phenology of Agrias (Charaxinae). Tropical Lepidoptera Research 19(1): 29–34, 33 figs. pdf
• Carlos Antonio Peña Bieberach, 2009 Evolutionary history of the butterfly subfamily Satyrinae (Lepidoptera: Nymphalidae) Thesis Department of Zoology Stockholm University pdf
• Furtado, E. 2008. Intergeneric hybridism between Prepona and Agrias (Lepidoptera: Nymphalidae, Charaxinae). Tropical Lepidoptera Research 18(1): 5–6.pdf

 

Wikimedia Commons has media related to Agrias.

•   Data related to Agrias at Wikispecies
• Agrias (as Prepona) images at Consortium for the Barcode of Life
• Agrias claudina at ARKive
• BOA Photographs of type specimens including subspecies and forma
• "Agrias Doubleday, 1844" at Markku Savela's Lepidoptera and Some Other Life Forms
• Agrias Butterflies: The Gems of the Insect World
• Agrias photographs, Robert Aronheim collection
• Nymphalidae Study Group
• The Agrias Page^{[permanent dead link‍]}
• Pteron (Japanese site with binomial names)
• Janzen photos of larvae and pupae (2 pages). Via search Agrias + caterpillars