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Western Elder Moth

Zotheca tranquila

Plate XXVII — Western Elder Moth is Fig. 2
Plate XXVII — Western Elder Moth is Fig. 2

The larva feeds upon elder (Sambucus). The moth ranges from northern California to British Columbia and eastward to Wyoming. The greener form was named viridula by Grote. The difference is hardly subspecific, as the shade of green on the wings is hardly alike in any two specimens, and the color soon fades out.