49.196 Bactra lacteana (Sedge Lance)
ws: 10-17mm; May-Aug; carnation sedge (Carex panicea); NS-B grazed sedge lawns in S.England and moorland in N.England, N.Wales and W.Scotland. First recorded 1996. (Ref: Sterling & Parsons)
Bactra lacteana §1 male
ID: Very variable. Requires genital dissection to distinguish from other Bactra species. Sterling & Parsons suggest that B.lacteana should be suspected if the median longitudinal streak shows two long fine dark parallel lines between the discal crescent and the apex; and mentions a uniform reddish-brown form.
Male genitalia: saccular spines 2-4, not crossing saccular margin
Female genitalia: ostium moderately broad, anterior lip weakly developed, posterior lip with a straight posterior margin, neither lip extending beyond ostium laterally, signum oval.
Male genitalia: saccular spines 2-4, not crossing saccular margin
Female genitalia: ostium moderately broad, anterior lip weakly developed, posterior lip with a straight posterior margin, neither lip extending beyond ostium laterally, signum oval.
§1 New Forest, Hampshire; 03/06/2012; male; fw 6.6mm
§2 Westcliff-on-sea, Essex; 15/08/2012; female
§3 Westcliff-on-sea, Essex; 13/08/2021; female; fw 8.1mm
§4 Shottisham, Suffolk; 11/08/2024; male; fw 6.9mm; specimen supplied by Paul Kitchener
All images © Chris Lewis
§2 Westcliff-on-sea, Essex; 15/08/2012; female
§3 Westcliff-on-sea, Essex; 13/08/2021; female; fw 8.1mm
§4 Shottisham, Suffolk; 11/08/2024; male; fw 6.9mm; specimen supplied by Paul Kitchener
All images © Chris Lewis
Page published 19/01/2013 (§1-2) | §3 added 11/12/2021 | §4 added 30/11/2024
