Pollex ( Bilobiana ) silaui, Fibiger, 2007

Pollex ( Bilobiana) silaui View in CoL Fibiger, new species

( Plate 6 View PLATE 6 , figure 2; female genit. plate 24, figure 2)

Material examined.

Holotype: female, Indonesia, Sumatra N, Huta Padang , 13.ii.2002, leg. and genit. prep. 4546 M. Fibiger. Coll. MF, to be deposited in ZMUC.

Diagnosis.

Wingspan: 11 mm.

Forewing: brown.

Transverse lines: black; terminal line marked by black dots between veins.

Reniform: distinct, yellow, outlined by black.

Hindwing: unicolorous brown with an indistinct black discal spot.

Underside: unicolorous brown.

Female genitalia.

7 th abdominal segment: heavily sclerotised, asymmetrical.

Anterior apophyses: length 1½ of posterior apophyses.

Position of ostium bursae: slightly above middle of 7 th segment, displaced to left.

Antrum: heavily sclerotised, basally narrow, medially abruptly broader until posterior end.

Ductus bursae: membranous, long, twice as long as corpus bursae.

Corpus bursae: globular.

Appendix bursae: arising anteriorly from ductus bursae immediately after antrum.

Differential diagnosis.

P. silaui differs from the other species by having antrum divided into two cylindrical tubes of different width. Pollex ( Bilobiana) balabaci Fibiger, new species

( Plate 6 View PLATE 6 , figure 3; male genit. plate 16, figure 3)

Material examined.

Holotype: male, Philippines, Balabac , Dalawan Bay, 10.x.1961, caught in Malaise-trap, leg. Noona Dan. Exp., 1961-62, genit. prep. 3539 M. Fibiger. Coll. ZMUC.

Paratypes: 1 male with same data as holotype, but and genit. prep. 3503 M. Fibiger. Coll. MF .

Diagnosis.

Wingspan: 11 mm.

Forewing: narrow, blackish-brown.

Transverse lines: black; terminal line marked by black dots between veins.

Reniform: distinct, whitish grey, outlined by black.

Hindwing: unicolorous dark grey with an almost invisible black discal spot.

Underside: unicolorous dark grey.

Hindleg: with large, black scent tufts.

Male genitalia.

Tegumen: narrow.

Vinculum: short, stout.

Saccus: U-shaped, short.

Fultura superior: dorsally and ventrally Y-shaped with long narrow arms, fused medially with tegumen, ventrally with juxta-anellus, and to basal part of valve.

Valve: shorter than wide.

Ampulla: long, club-like, subapically ventral directed; densely setose with long hair-like setae bent inwards. Pollex : long, finger-like, broadest medially; densely setose with long hair-like setae bent inwards.

Digitus: huge, tapered, curved, directed ventrally, apically pointed.

Juxta-anellus plate: round, as wide as high.

Phallus: long, bent at ductus ejaculatorius, curved and tapered towards apex; coecum short and broad.

Vesica: with a long, slightly curved, spine-like cornutus.

Differential diagnosis.

P. balabaci differs from the other species by the shape of the fultura superior and the long, curved cornutus.