Recent Status: First recognised as a British species in 1998. First recorded in Suffolk 14th August 2015 at Dunwich Forest. It has since been found at other locations.
Life Style: A single brooded species flying in mid-summer and comes to light. The larvae feed in the base of the central stems of Carex panacea. The larvae hibernate and pupate in the larval habitation.
Identification:Bactra are a narrow winged Olethreutinae with pointed wings. The females are predominantly dark from the base to a little below the apex with a paler costa. The dark shading may become a red brown and lighter towards the dorsum and tornus. They may show some of the traits of the males but can seldom be reliably identified without genitalia dissection. The males of Bactra species show a dark hooked mark centrally at two thirds. They may also show a reticulation, dark longitudinal lines, costal strigulae, spots on the termen and even marks in the ocellus. B. furfurana is the most readily recognised as it also has a further two prominent dark marks on the wing. B. lacteana has two parallel short streaks just short of the costa and of the apex. B. robustana is a coastal species and the largest Bactra. It has numerous short costal strigulae that do not become significantly more widely separated as they close in on the apex as they do for B. lancealana. B. lancealana is the commonest species. When these differences are not clear in a specimen then identification is by genitalia dissection. More Info
Determination by Genitalia Examination (gen. det.) Required
Recorded in 3 (5%) of 58 10k Squares. First Recorded in 2015. Last Recorded in 2019. Additional Stats