treatment provided by
Genus Vas Fibiger , new genus
Type-species: Vas owadai Fibiger , new species.
Taxonomic notes. The genus Vas contains two known species. The genitalia indicate a closer relationship to the following genera than to the previous ones.
Diagnosis. Imago (external). Wingspan: 10 mm.
Labial palps: porrect; second segment brown outside, beige inside; gradually more roughly scaled distally; third segment 1/4 of second, narrow, beige, tufted (apo.).
Head, patagia, tegulae, thorax, and ground colour of forewing: brown; narrow costal part of medial area and terminal area dark brown (apo.).
Forewing: long and narrow, with pointed apex.
Abdomen: grey, with dorsal tuft on basal segment.
Crosslines: all present, though indistinctly marked; terminal line marked by black interneural dots.
Reniform stigma: small, whitish, outlined by dark brown.
Hindwing: light grey, with indistinct discal spot.
Underside: forewing brown grey, hindwing light grey, discal spot of hindwing present.
Female genitalia. Ovipositor: quadrangular, with rounded corners.
Posterior apophyses: slightly longer than ovipositor.
Anterior apophyses: length 1/5 of posterior apophyses.
7 th abdominal segment: half as long as wide; shortest ventrally.
8 th abdominal segment: ventrally free, with postvaginal, conelike plate.
Ostium: displaced slightly to left, large.
Antrum: broadly vase-shaped, 1.5 times longer than wide; ventrally shorter (apo.).
Ductus bursae: membranous, very long and narrow, 3–4 times longer than corpus bursae.
Corpus bursae: globular.
Appendix bursae: arising posteriorly from ductus bursae.
Signum: cross-shaped, longitudinal bar shorter.
Distribution. Genus Vas known from N Thailand and N Vietnam.
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