Diagnosis. Trifurcula manygoza is recognised by its uniform pale ochreous wings, externally very similar to T. ortneri; the male genitalia are almost inseparable from those of T. eurema, the female from those of T. cryptella. From T. ortneri it is separated by the more obtuse angle of the valva inner margin, the less conspicuous dorsal lobe of aedeagus and the slightly smaller cornuti (longest 50-82 μm against 97-133 in ortneri).
Description. Male. Forewing length 2.1-2.7 mm, wingspan ca. 4.7-6 mm. Head: frontal tuft, yellowish white to orange; collar white, comprising piliform scales; scape white. Antennae pale grey, with 32-34 segments. Thorax and forewings uniform yellowish white, with ochreous tipped scales; underside grey. Hindwings white, underside white, with velvet patch of raised scales; a long, ochreous, hairpencil arising on hindwing underside near frenulum, inserting under the foresing costal fold. Abdomen with anal tufts yellowish.
Female. Forewing length 2.55 mm, wingspan ca. 5.5 mm. Antennae with ca. 29 segments. Hindwing without velvet patch, abdomen without tufts; otherwise as male.
Male genitalia (24-26, 39, 45). Vinculum slightly indented anteriorly. Tegumen produced into pointed pseuduncus. Uncus split lengthwise, pointed. Gnathos with rounded central element. Valva elongate triangular, with obtuse angle medially on inner margin; sublateral process rather long, transverse bar of transtilla longer than sublateral process. Aedeagus short; vesica with group of long needle like cornuti at anterior right hind side; two large curved cornuti and semi globular group of close set curved cornuti at left side, also some minute cornuti; aedeagus dorsal side distally ending with rounded sclerotized lobe at right side; juxta ending into bifurcate ventral carina.
Female genitalia. T8 divided, slightly narrowed posteriorly, each half with ca 21 setae; anal papillae each with 15-17 setae; apophyses subequal in length. Bursa total length 872 μm. Vestibulum with patch of close set pectinations near spermathecal papilla; signa 3-4 cells wide. Ductus spermathecae with ca.9½ convolutions, ending in a globose vesicle.
Hostplant: unknown, not yet reared. By association it is probable that Dorycnium spp. and Lotus spp. are amongst the hostplants. A. and Z. Laštůvka collected adults in Greece in a vegetation with much Dorycnium and Lotus, no Coronilla. In Rabac, Croatia, one specimen was collected in a dense stand of Dorycnium, the second one in a locality with Lotus, where also some mines with parasitized larvae were found, possibly of this species. Immature stages unknown. Adults collected in June and August.
Distribution. Croatia and northern Greece. To be expected in the other Balkan countries.
This taxonomic description is based on Van Nieukerken (2007).