On a variety of Euzostria aruensis, Gorh
Notes from the Leyden Museum , Volume 11 - Issue 3 p. 158- 158
Among a few insects from Goldie-River, New-Guinea (30 miles inland from Port Moresby), I obtained an Erotylid, which proved to belong to the newly erected genus Euzostria Gorh. (Notes from the Leyd. Mus. X, p. 140, pl. 7, fig. 6) founded upon a single specimen of a new insect from the Aru-Islands. The comparison of my specimen with the description of this species ( E. aruensis Gorh.), offering several differences, I was inclined to regard my New-Guinean insect as a closely allied but distinct species. However, after a careful examination of the type-specimen, I think it will fie better to consider the New-Guinean form as a variety, at least provisionally, until the arrival of a more extensive material shall allow us to obtain certainty. As- the spotted thorax of my specimen gives the insect a quite different and peculiar aspect, I propose the name binotata v. d. Poll for this variety, which may be characterized as follows. The face between the eyes is nearly impunctate. The thorax is less convex, the anterior angles are broader, the disc is ornated with two round black spots, and the base narrowly edged with black, more broadly so in the middle, which makes the thorax apparently shorter. The large punctures are less numerous but larger, the small punctures on the contrary still finer. The yellow band of the elytra is narrower at the suture, i. e. the band of each elytron is more triangular. Moreover, the rows of piceous dots on the yellow band, which are very distinct in the type, are hardly visible in the variety. Finally the colour of the thorax, of the apical elytral spot and of the two last ventral segments is dirty yellow instead of deep red.
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Neervoort van de Poll, J. R. H. (1889). On a variety of Euzostria aruensis, Gorh. Notes from the Leyden Museum, 11(3), 158–158.