Homonopsis illotana

Author: (Kennel, 1901)

Species Overview:

Adult: males 14-17 mm wingspan, females 18-21 mm wingspan; forewings cream tinged brownish, with dark brown markings and small metallic spots; without costal fold. Apex and apical portion of termen dark in females; cilia at apex dark in males. Hindwing greyish brown. Veins R4 and R5 in forewing stalked.
Larva: average length 18 mm; head pale yellowish ochreous, with dark markings; body pale green with white dorsal line; prothoracic shield yellowish or of body colour, with dark brown lateral areas; thoracic legs, pinacula and anal shield pale yellowish ochreous.

Taxonomic Description:


Homonopsis illotana male
External characters: 14-17 mm wingspan. Labial palpus yellowish brown, head and thorax darker. Forewing without costal fold, slightly expanding posteriorly; costa bent throughout; apex pointed; termen convex, but sinuate beyond apex. Ground colour cream tinged brownish; markings dark brown; markings with small metallic spots. Basal blotch broad, diffuse, extending from dorsum, pointing before costa, marked black subdorsally. Brownish suffusion along dorsum often distinct. Median fascia almost completely atrophied; subapical marking narrow, extending from small costal spot. Cilia dark at apex. Hindwing pale grey-brown, cilia paler (Yasuda, 1975b).

male genitalia H. illotana
Genitalia: Tegumen large, extending proximally; uncus very broad, bilobed, provided with large brush consisting of long scales; gnathos slender; socii indistinct. Valva with elongate, densely spined distal part, valva more slender than in Homonopsis foederatana. Sacculus broader basally, tapering terminally, without apical hook. Transtilla very broad, fusing with disc sclerite, almost vertical. Aedeagus shorter than in Homonopsis foederatana, rather straight; no cornuti present.


Homonopsis illotana female
External characters: 18-21 mm wingspan; forewing costa more bent than in male, especially in basal half, slightly concave subapically, apex pointed. Markings reduced; wing covered with ill-defined refractive spots. Apex and apical portion of termen blackish.

female genitalia H. illotana
Genitalia: Sterigma with strong concave lateral lobes and convex, rounded antevaginal portion; antrum distinctly sclerotized, more curved than in Homonopsis foederatana. Ductus bursae long; corpus bursae with large signum, capitulum atrophied.


Moths collected in Japan from mid May till the end of July.
Hibernation in larval stage.

Host plants:

Abies sachalinensis, Acer sp., Castanopsis sp., Elaeagunus sp., Lyonia ovalifolia, Malus pumila, Polygonum cuspidatum, Prunus sargentii, Prunus mume, Quercus glauca, Quercus acutissima, Quercus variabilis, Quercus serrata, Smilax china.


The species is not very important economically.


Russia: Primorsk, Ussuri; Japan: Hokkaido, Honshu: Korea.


Pheromone unknown.

Homonopsis rubens Kuznetsov

male genitalia H. rubens
female genitalia H. rubens
Homonopsis rubens Kuznetsov, a species collected from Abies hollophyla, Alnus hirsuta and Manispermum dauricum, occurs in S. Primorsk (Russia) and Korea. Judging by the drawings of male genitalia made by Kuznetsov, 1976, the sacculus has a small free termination, the transtilla is very narrow at both lateral ends and the uncus is less deeply incised apically than in Homonopsis illotana.