Exp. alar. 2 un. 9 lin.

Habitat:  New Holland.

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Genus SYNEMON, Doubleday.

Head round, eyes large, forehead broad.

Maxillae rather long.

Labial palpi short, clothed with dense long scales, first joint short, second more than double the length of the first, tapering towards its extremity, third joint about equal in length to the second, sub cylindric, tapering towards the apex.  Antennae with a stout, short club, more or less mucronate at the apex, the mucro mostly if not always with a tuft of scales at the point, the club sometimes appearing compressed (perhaps from desiccation).

Thorax stout, anterior wings triangular, the costal nervure terminating about the middle of the costa, the sub-costal terminating in five nervules of which the first and second one are thrown off before the disco-cellular nervule, the third almost immediately beyond it, the fourth rather further from the third than this is from the second; discoidal nervules almost atrophied at their origin, the first connected with the subcostal nervure, the latter with the third median nervule by a very short discocellular; the discoidal nervule itself almost atrophied, running nearly parallel with and immediately above the median; third median nervule much bent at its origin.  Posterior wings sub-ovate, costal nervure long, sub-costal terminating only in two nervules, upper discocellular nervule wanting, discoidal nervure distinct and simple throughout its whole course to the outer margin, with a slight bend at its junction with the short disco-cellular which connects it with the median nervule:  bristle in the male simple, retained by a corneous retinaculum arising from the posterior side of the sub-costal nervure, compound in the female, retained by a bunch of scales arising from the anterior side of the median nervure.

Anterior legs short, tibiae with a strong sharp spine about the middle, the first joint of the tarsi about the same length as the tibiae, the four remaining ones equal in length to the first:  second pair with the tibiae about two-thirds as long as the tarsi, bi-spinose at the extremity, first joint of the tarsi nearly equal to all the rest:  posterior legs with the tibiae about two-thirds the length of the tarsi, bispinose at the apex and furnished also with two spines beyond the middle, first joint of the tarsi longer than the rest combined.  Claws of all the feet simple, tarsi spiny.

Abdomen cylindrical, arched in the male, tufted at its extremity, in the female tapering to a point.

There seems to be a slight difference in the structure of the antennae in this genus, in the first species the club is rounder and less mucronate than in the two following ones, it seems also destitute of the tuft of scales at the point.

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SYNEMON SOPHIA.

Hesperia ? sophia, White, Appendix to Grey’s Narrative, volume 2, page 474, figure 7.