Cisseps packardii

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Synonyms: Scepsis Packardii. Scepsis Matthewi, Scepsis wrightii

Proceedings of the Essex Institute, 1864-65, pg. 43 by Packard:

Upon comparing afterwards specimens of a Californian species in the Museum of Comparative Zoology at Cambridge, which is closely allied to the species first mentioned [Scepsis fulvicollis], I find that the characters considered above as generic will in no case have to be altered. In the Californian species the style of coloration is the same, the palpi are a little more curved, the antennas are the same, so also the pro-thorax, the neuration is identical throughout, and there is the same broad obtusely pointed tip of the abdomen.
The specific distinctions are these; a light tint of brown, a brownish abdomen, instead of deep blue, and a more hairy thorax than in S. fulvicollis; while in size, the two species are much alike.

Proceedings of the Entomological Society of Philadelphia, 1865, Vol. 4, pg. 318 by Grote:

Eastern Zygsenid genera since I have from thence a specimen of Scepsis fulvicollis Walker, undistinguishable from our specimens from Canada and the Eastern States, except that the "collar" is of a paler yellow, and quite distinct from the Californian species described but not named by Dr. Packard in his paper "Notes on the Family Zygsenidae" p. 43, and which latter may be named Scepsis Packardii. Dr. Packard thus describes the latter species: "The specific distinctions are these; a light tint of brown, a brownish abdomen, instead of deep blue, and a more hairy thorax than in S. fulvicollis, while in size, the two species are much alike."

Proceedings of the California Academy of Sciences, 1873-75, Vol. 5, pg. 184 by Edwards:
Scepsis Matthewi, n. sp.
Male. Head dull black. Tongue chestnut brown. Palpi dull yellow, black at their tips. Antennae bluish black, much longer than those of S. fulvicollis, with the pectinations larger and more distinct. Prothorax yellow, differing in tint in different individuals, and apparently fading with the age of the specimen.
Thorax and patagia smoky drab, with a slight blackish tint in front. Abdomen bluish black above and below. Legs bluish black. Anterior wings perfectly opaque in fresh specimens, smoky drab, with a slight golden reflection. The costa is a very little paler, and the whole of the nervures are blackish, distinctly
marked. Posterior wings, bluish black, with a broad longitudinal hyaline patch extending, in most specimens, through the whole extent of the wing, and even passing through the margin.

Female. Same as the male, but with the pectinations of the antennae more simple, and the abdomen more robust.
Expanse of wings, l.60 inch. Length of body, 0.55 inch.
Vancouver Island. August. Common.

The pale color of the upper wings, the length of the antennae, and the more extended hyaline patch of the posterior wings, as well as the larger size of the entire insect, will serve to distinguish this species from Scep. fulvicollis. It was taken in some abundance at Skinner's Bottom, near Victoria, by myself
and my friend, Mr. Gervase Mathew, of H. M. S. Repulse, to whom I have great pleasure in dedicating it. Its habitat was the side of a lagoon overgrown with rushes. When disturbed, it flew slowly for a short distance, alighting again on the stems of the reeds, and was by no means difficult of capture. In this
respect it differs exceedingly from S. fulvicollis, as that species, so far as my experience goes, has a rapid and continuous flight.

The Canadian Entomologist, 1880, Vol. 12, pg. 44 by Coquillett:

Scepsis fulvicollis, Hubner.—A dark colored dorsal line, then a pale greenish stripe on which is a row of small warts; next to this stripe is a pink line, then a pale yellow line, then a dark greenish, slate-colored stripe on which is a row of small warts; the spiracles are situated on the lower part of this stripe, below the warts; below this stripe is a pale yellow line; between this line and the legs are two rows of small warts; from each of the above warts proceeds a thin, spreading cluster of whitish hairs; venter pale greenish-yellow; head shining yellow; length 1 inch. Feeds on grass; June 15 to August 1. Spins a cocoon.

Journal of the New York Entomological Society, 1898, Vol. 6, pg. 249 by Coquillett:

Scepsis wrightii Grote.
A caterpillar pupated December 14, 1889, and the moth issued February n of the following year. The chrysalis is pale yellowish, marked with a dorsal, lateral and ventral broad black interrupted band and a subdorsal row of black dots. Another caterpillar pupated February 18, 1890, and the moth issued March 21, of the same year.


The Canadian Entomologist, 1899, Vol. 31, pg. 159: Catalogue of the Lepidoptera Phalenae in the British Museum, Vol. 1 Synotomidae by Sir George F. Hampson, 1898:

Scepsis fulvicollis, Hubn.
Under this heading Packardii, Grt., is recognized as a variety only. The larva is not referred to, though it has been described by Coquillett. (Can. Ent., XII., 44.)

Scepsis Wrightii, Str. Coquillett's notes on the pupa (Journ. N. Y. Ent. Soc, 1898, VI., 249) were published too late for insertion.

Grote’s rebuttal on page 192: I may also add, that it can hardly be settled in the British Museum, whether the Californian Scepsis Packardi, which has lighter tinted primaries, and greater extension of a paler yellow on the head, be a local race of S. fulvicollis or not. From analogy in the group, it will probably prove distinct. Roemer Museum, Hildesheim, Germany. A. Radcliffe Grote.

The best explanation is from Pacific Northwest Moths website:
http://pnwmoths.biol.wwu.edu/browse/family-erebidae/subfamily-arctiinae/tribe-arctiini/cisseps/cisseps-fulvicollis/

The name Cisseps packardii (Grote, 1865) has been used for specimens from the Pacific Northwest. We see no evidence for more than one species in our area and suspect that packardii is a synonym of fulvicollis.