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Ladona julia (Chalk-fronted Corporal)BC conservation rank: S5. Yellow List.Description: Mostly brown. Named "corporal" because immatures have a pair of pale stripes on the top of the thorax; they also have a dark stripe on top of the abdomen. Mature adults are "chalk-fronted" with distinctive pale pruinescence on the front of the thorax, as well as the base of abdomen - white on males, grey on females. The wings are clear except for small, dark marks at the bases; those on the hindwings are triangular. Length: male 42 mm, female 40 mm. Global range: Southern British Columbia east to Nova Scotia; south to West Virginia and California. Faunal element: Transition (see Appendix 2). BC Distribution: Widespread in the southern half of the province. Biology: Found around peaty forest ponds (e.g., in fens such as Wf07) and swampy lake bays (e.g. Nuphar lutea - Utricularia macrorhiza association); favours slightly acidic waters, where it can be surprisingly abundant. It often rests on rocks, logs, floating waterlily leaves or the bare ground and can be tame. BC flight period: late May to early September; mostly recorded from mid June to late July.
Ladona julia Map 1. Geographical distribution and seasonal abundance of records in British Columbia. Ladona julia Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet. Ladona julia Map 4. Frequency of collection localities in British Columbia by NTS 1/50,000 mapsheet. |
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