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Sasunaga Moore

Type species: tenebrosa Moore.

The forewings are long, narrow, apically produced, brown with a striate ligneous pattern in which the orbicular stigma is often prominent. The hindwings are large, often triangular, particularly in male specimens.

In the male abdomen the trifine hair pencils are well developed in S. leucorina Hampson and S. interrupta, but not in tenebrosa and allies. The eighth sternite has large but short coremata associated with lateral rods. The valve of the genitalia has a corona, and there several long setae on its ventral margin. The harpe is very basal, distinctively bifid .The uncus apex is swollen, setose, with a distal, dorsal spine above a rounded ventral portion. The aedeagus vesica is narrow, small, tubular, unadorned.

The female genitalia have the ovipositor lobes rectangular, set obliquely to the slender apodemes, so they have their distal margin ventrad. The base of the ductus is a sclerotised tube, from which the rather pyriform bursa gradually expands; just distal to the sclerotised ductus is a small, globular appendix bursae. The bursa is finely scobinate and corrugate.

The larva of the type species is described below.

The American genus Magusa Walker and the African Callixena Saalmueller are similar in facies, but differ sufficiently in male and female genitalia characters for all three genera to be treated as distinct. The orientation of the small ovipositor lobes and the type of coremata described above on the male eighth sternite are shared, indicating that the three form a natural group. Host-plant records for Magusa (Kimball, 1965) and Sasunaga (see below) are all from the family Rhamnaceae.

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