45.027 Crombrugghia laetus (Scarce Light Plume)
ws: 14-23mm; May-Oct; very rare migrant from S.Europe
Crombrugghia laetus §1 female
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ID: 3rd lobe of hindwing with a small scale-tooth at ⅔; 2nd forewing lobe not square-ended; forewing mid- or pale brown (not dark brown) > Crombrugghia. C.distans and C.laetus are very similar and may require genital dissection for confident separation. C.distans tends to have more distinct forewing markings and is more variable in general colouration. C.laetus has a row of small dark brown scales at the termen of the 2nd lobe of the forewing which are absent in C.distans - see image right.
Male genitalia: The two Crombrugghia species can be distinguished by the relative lengths of the sacculus and valvulus; ~equal in C.distans, sacculus much longer than valvulus in C.laetus. Female genitalia: Crombrugghia species have two small signa. The two species differ in the shape of the periostial plates. |
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§1 St Mary's, Isles of Scilly; 15/10/2023; female; fw 7.6mm; specimen obtained by Paul Fallon & Richard Wall
All images © Chris Lewis
All images © Chris Lewis
Page published 02/07/2024 (§1)
