Moved from Butterflies and Moths.

You nailed it! I just stumbled on Braun's (1925) description of the larvae of E. zelleriella, which she reared from Phacelia bipinnatifida, and it matches perfectly:

"The full grown larva is a brightly colored and beautiful creature. The ground color is chrome yellow, marked with velvety black spots and irregular longitudinal black or bluish black stripes and bands. Each tubercle area is black (as described and figured by Busck in the life history of Ethmia macelhosiella)1 and there is, in addition, a longitudinal dorsal series of black spots, beginning on the second abdominal segment and consisting in each segment of an elongate spot crossing the suture, and a larger round spot in the middle of the segment. The longitudi nal stripes are not so deeply black, and shade to bluish where they run into the chrome ground color. A subdorsal longitudinal stripe extends the length of the body and includes the setal areas above the spiracles and the spiracles also behind the second abdominal segment; setal area I lies just outside its boundary. There is an oblique lateral backward projection from this stripe in each segment beginning with the second abdominal. On the second thoracic segment, the stripes are connected across the dorsum between setal groups I. The third thoracic segment, except a small anterior lateral patch, and the anterior half of the first abdominal segment are black. A more or less broken grayish black stripe extends the length of the body and includes in each segment the black spot around seta VI. Legs black. Head shining black, with yellow transverse band."

Other Ethmia spp. are recorded from Phacelia, but this is the only species known from P. bipinnatifida.

on Phacelia. Wonder if they are all related??

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