Tortricidae : Olethreutinae
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Photo © Raymond A Watson,  Hollesley, Suffolk. 23 July 2019

Similar Suffolk Species
Bactra lancealana
Rush Marble
Approx Length (c. 9.5mm) Wingspan (13-19 mm)
      
      
      
      
    
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Bactra furfurana
Mottled Marble

(Haworth, 1811)1110 / 49.195

Morley’s Final Catalogue: A local species, feeding in Juncus-stems. Lowestoft before 1890 (Boyd).

Recent Status: This species is widespread but not common..

Life Style: A double brooded species found from May to September. Flies day and night and comes to light. The larvae feed inside stems of Eleocharis palustris and Juncus conglomeratus. They pupate in the last larval feeding 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

Recorded in 19 (33%) of 58 10k Squares.
First Recorded in 1987.
Last Recorded in 2019.
Additional Stats

Bactra lancealana  |  Bactra lacteana >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
04/08/2019125TM24 - Woodbridge/Martlesham
29/07/2019+25TM34 - Hollesley/Rendlesham Forest
26/07/2019125TM24 - Woodbridge/Martlesham
26/07/2019125TM46 - Minsmere/Leiston
25/07/2019+25TM35 - Snape/Tunstall
Show Details | 1990 to 2019 | 2000 to 2019 |
Express Record Bactra furfurana
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Copyright © Jim Wheeler 2020
   

Wingspan: 13-19 mm
Flight: June - July. (Aug)
Foodplant:   Commmon Club-rush, Compact Rush.
Nat Status: Local
Verification Grade:  Adult: 2
 Immature Adult
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Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ - Suffolk 2020. © James Wheeler - Norfolk Moths 2007 - 2020. Data © NOLA™ - Suffolk 2020
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