Sommeria malgassica   Toulgoët 1954

Photograph by: JHH Zwier by courtesy CMWM Mďnchen
   Moramanga ŕ Anosibe (domaine de l'est) Madagascar

Photograph by: JHH Zwier by courtesy of CMWM, München
   (Haute Ikoly) Madagascar

 about    mm  ( n = )
 about    mm  ( n = )

Distribution according to the collections mentioned in the chapter
“Museums” and the literature.

- Madagascar: Domaine de l’Est (CMWM) Moramanga (CMWM) Toulgoët 1954: Madagascar central, massif de l' Ankaratra, Manjakatompo, foręt d’Auibahona.



Antennae black, the first half serrated, covered with whitish grey scales at the base. Head of a mouse-grey, slightly yellowish colour, with two black dots on each side above the front, which is also grey. The labial palps are silver with a black tip, and two black dots on the outside. The collar mouse-grey with two black dots. Thorax entirely grey mouse, and pterygodes, each with a black spot at the base. Upper abdomen of orange-yellow with a black dot in the middle of the base of each segment. Abdomen from below uniformly grey with a black dot on each side of the segments, the legs are smooth mouse grey and lighter at the joints, except for the first pair, which has a black spot at the base of the upper part of the leg.
Very long forewings with the costal area (cell included) grey-white glossy, up to the subterminal region. The costa has a fine extra black basal line, successively followed by a small stripe and then by two superimposed black dots. Two other similar spots near the costa, immediately after the middle of the wing. A rather large black dot in the centre of the cell, touching the vein. A black curved line underscores the discocellular dots. The inner half of the wing, bounded by the cubital, is entirely mouse grey with a black line at the wing base in the radius. The outer quarter of the wing is darker than the rest grey mouse, which it contrasts from a wavy line, which is vertical on the inner edge. Fringes of the same colour
The rear wings are slightly translucent, bright orange yellow, darker at the base, pale yellow with a narrow costal margin. Fringes of the same colour and gloss. The underside of the forewings pale yellowish grey costa, drawing on the top two cell spots especially shines through. The bottom of the rear wings of the same colour as the top, but duller. The female has that too, but the white part of the wing less developed, and the black spots are smaller. The apex is more square and the inside angle is more rounded.
At first glance, this beautiful species has a strong resemblance to Digama ostentata Dist, Natal. In this study, however, varies considerably in size (ostentata: ♂ 38 mm, ♀ 34 mm), the white colour of the wings, which ostentata, translated as a simple clarification of the costa
Moreover, the species of Natal, has the colour of the wings entirely mouse grey and the subterminal area separated from the rest by a curved line that the white costa attaches to the base of the anal discocellulaires, while in malgassica not exist, where subterminal region is limited from the front edge to the inside edge past the black disco cellular line. Finally, this line of ostentata replaced with a clear round tip
These significant differences are more than confirmed by the genital layout of both species which are not likely to be confused, as evidenced by the figures, and I confine myself to drawing attention to the shape of the valves and the toothed plate malgassica's penis, which one does not find in ostentata.

Data from the book: The Afrotropical Tiger-Moths by David T. Goodger and Allan Watson, Apollo Books, Stenstrup, Denmark 1995.
This copy of the first description is taken from a book or a periodical out of the library of the Dutch Entomological Society in Amsterdam.

*A lot of data are from the author of the first description.