DescriptionThe scientific name comes from the distinctly broken thorax stripes, usually on males found on B.C.’s coast; interior populations normally have complete narrow stripes. This variation gives the species its English name. The stripes are usually yellow-green below and blue above. The face is green-yellow to pale blue with a black line. Pale areas on females are usually green or yellow, but some are blue. Male’s appendages simple. Length: ♂ 70 mm, ♀ 66 mm.
Flight PeriodB.C., late May (though uncommon before July) to early November; Yukon, late June to early September.