Type species: transitiva Walker.
This genus has reduced hindwing venation as in Ceryx Wallengren
and Syntomoides, illustrated in Fig. 6. The space posterior to vein CuA2
contains only a single transparent patch. The male antennae are filiform.
Features of the male abdomen are definitive. The eighth segment has the
tergite deep, broadened, bilobed, separated from the tegumen of the genitalia by
an expanded intersegmental membrane. This is not expanded between the narrow,
entire, marginally rounded sternite and the vinculum, so the genitalia are
directed downward. The tegumen is very deep, the uncus sinuous with a pair of
huge earlike structures dorsobasally. The valves are more or less triangular,
apically serrate. The aedeagus is slender, with a small, scobinate vesica.
The female genitalia have the eighth segment narrow, pulled forward with
the ostium into a notch in the seventh sternite, and flanking the ostium with
semicircular flanges. These flanges and the ovipositor lobes are densely covered
with minute setae. The seventh segment is very deep, with a pair of scobinate
puckers set posteriorly between tergite and sternite. There is a single signum
in the bursa as in Caeneressa, but without the central zone of reduced
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