The trematos -group

Description. Adult. Head, in lateral view, inclined at ≥ 45° from longitudinal axis of body. Vertex (Figs 10G–I, 11A–H) trapezoidal, covered with distinct imbricate microsculpture (partly reduced in ♂ of M. dimorpha sp. nov.: Fig. 10J) and microscopical setae. Thorax weakly or moderately arched, covered with microscopical setae. Forewing (Figs 17, 18A, B) relatively uniformly coloured, with small brown dots; pterostigma distinctly expanding towards the middle or apical third, longer than 4.0 times as wide; vein R 1 weakly convex or straight medially. Paramere, in lateral view, irregularly spatulate or lanceolate. Distal segment of aedeagus bearing ventral process (small in M. cabucu sp. nov. and M. dimorpha) which is, in dorsal view, narrower than apical dilation.

Immature. Antenna 10-segmented.

Comments. The group includes eleven species from Brazil described here and Melanastera maculipennis (Brown & Hodkinson) from Panama. Eight species develop on Melastomataceae ( Miconia, Pleroma), two on Cannabaceae ( Trema) and one each on Annonaceae ( Guatteria) and Myristicaceae ( Virola).