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Clark's Day-sphinx
The head, thorax and abdomen on the upper side are prevalently pale olive-green, the fifth and the three anal segments of the abdomen being darker green. The fore wings are pale green with an oblique brownish median band, and a triangular paler brownish spot at the apex. There is a small black discal dot at the end of the cell. The hind wings are deep orange-yellow, margined with black. On the under side the wings are olive-green, darker at the base. The hind wings have a waved whitish band about their middle on the under side. The legs are greenish-white.
This species is found from Oregon to northern California, and eastward to Utah and Montana.