Tortricidae : Olethreutinae
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Photo © Raymond A Watson,  Hollesley, Suffolk. Male

Similar Suffolk Species
Bactra furfurana
Mottled Marble
Bactra lacteana
Scarce Sedge Marble
Approx Length (c. 10mm) Wingspan (11-20 mm.)
      
      
      
      
    
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Bactra lancealana
Rush Marble

(H?bner, 1799)1111 / 49.194

Morley’s Final Catalogue: Of frequent occurrence in swamps everywhere from Bentley to Shipmeadow; sometimes at Monks Soham light; especially abundant in Blythburgh Wood, among rushes.

Recent Status: A common species in Suffolk.

Life Style: A double brooded night flying species that comes to light. It can be found throughout the summer. The larvae feed in the stems of Juncus species, Schoenoplectus lacustris, Trichophorum cespitosum, Eriophorum angustifolium and Cyperus longus. 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 32 (55%) of 58 10k Squares.
First Recorded in 1987.
Last Recorded in 2020.
Additional Stats

Endothenia quadrimaculana  |  Bactra furfurana >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
12/06/2020125TM14 - Ipswich
24/05/2020125TM33 - Bawdsey/Felixstowe
18/05/2020125TM58 - Carlton Colville/Kessingland
18/05/2020125TM33 - Bawdsey/Felixstowe
09/09/2019125TM24 - Woodbridge/Martlesham
Show Details | 1990 to 2019 | 2000 to 2019 |
Express Record Bactra lancealana
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Copyright © Jim Wheeler 2020
   

Wingspan: 11-20 mm.
Flight: Two Generations. Jun - Oct.
Foodplant:   Various rushes.
Nat Status: Common
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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