Borkhausenia intumescens Meyrick, 1921, Ann. Transvaal Mus. 8: 99.

Corley, Martin F. V., Ferreira, Sonia, Lvovsky, Alexander L. & Rosete, Jorge, 2017, Borkhauseniacrimnodes Meyrick, 1912 (Lepidoptera, Oecophoridae), a southern hemisphere species resident in Portugal, Nota Lepidopterologica 40 (1), pp. 15-24 : 17-20

Borkhausenia intumescens Meyrick, 1921, Ann. Transvaal Mus. 8: 99. syn. nov. Figs 4-6

Type locality.

South Africa, Port Elizabeth. Justification for the synonymy is elaborated in the section Synonymy below.

Redescription.

Meyrick (1912, 1921) described Borkhausenia crimnodes and Borkhausenia intumescens separately. The redescription below is based on Portuguese specimens, but is equally applicable to the two Meyrick types. Male and female genitalia have not been described or documented previously (Figs 2-3, 6-10).

Habitus.

Male and female similar (Figs 11-12). Wing length 4.4-6.0 mm; wingspan 9-13 mm. Head cream-coloured. Antenna buff, with light brown bands, scape with a pecten-like row of elongated scales. Ocellus absent. Proboscis present. Labial palp upcurved, creamy white, segment 3 shorter than segment 2, with fuscous base and apex. Thorax creamy ochreous. Forewing elongate, narrow, creamy ochreous with extensive fuscous patches, sometimes mixed creamy ochreous, one patch at base extending to one-third on costa, and to three-fifths on dorsum with irregular outer margin, one in terminal quarter of wing and a small elongate patch along costa at middle; usually three dark fuscous round spots in mid-line, the first and third usually touching the basal and terminal dark patches respectively, the middle spot nearer the costa than the other two, a slightly elongated plical spot is sometimes visible within basal fuscous patch; cilia creamy ochreous. Hindwings light grey. Abdomen ochreous buff.

Venation.

Forewing with R4 and R5 stalked; R5 to costa near apex; Cu1 and Cu2 separately from the cell. Hindwing with Rs and M1 separately from the cell; M3 and Cu1 from one point; Cu1 and Cu2 separately from the cell.

Male genitalia

(Figs 2-3, 6-8). Uncus narrowed to pointed apex. Gnathos sclerotised, narrowed to pointed apex, extending beyond uncus. Valva with narrow processes at the base of costa forming hemitranstillae; sclerotised process at the distal end of sacculus strongly elbowed at base, with a slight outwards curve in middle, distal part crossing costa of valva perpendicularly. Juxta lobes broad, slightly tapering to hairy apex. Saccus triangular to trapeziform. Phallus slightly curved, cornutus saw-like, two-fifths length of phallus.

Female genitalia

(Figs 9-10). Ovipositor long and narrow. Small antrum sclerotised. Ductus bursae short. Signum flower-like with sclerotised narrow petals.

Variation

(Figs 11-12). Some Portuguese specimens have the forewing ground colour more golden ochreous than whitish ochreous. The precise shape of the basal and apical fuscous patches is somewhat variable; the middle dark fuscous spot may be weakly developed.