Comparison - Eastern Pine Elfin

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Eastern Pine Elfin (Callophrys niphon clarki), male. Paratype. Constance Bay, Ont. 4.V.38 E.G. Lester
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Western Pine Elfin (Callophrys eryphon eryphon), female. Fort Smith, NWT. 2.VI.50 W.G. Helps
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Bog Elfin (Callophrys lanoraieensis), male. Blandford [bog], Arthabaska Co., Que. 20.V.88 J.-P. Laplante
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Comparison - Eastern Pine Elfin with Similar Species

Very similar to and easily confused with the Western Pine Elfin (C. eryphon), but thelatter species has only one transverse dark bar in the middle of the forewing cell below (there are two parallel bars in niphon), and there is less grey shading in the submedian and marginal areas of the hindwing below. The series of black V-shaped marks on the hindwing below forms a prominent, continuous zigzag line in eryphon, but in niphon these form a discontinuous series of black peaks to the irregular brown spots that they "cap." The Bog Elfin (C. lanoraieensis) is much smaller, the groundcolour of the hindwing below is dark and light brown, not reddish or yellow brown as in C. niphon clarki, and the grey shading on the wing margin is more extensive, usually extending to the blackwedge-shaped marks.