forms and fall within the accepted limits of the genus, but there is some doubt as to whether the third species D. pallida Gourlay, is co-generic. As mentioned above, it differs in some important characters from the other New Zealand species, and on the basis of these characters may represent a distinct genus. I refrain from erecting a new genus at present, as I am not familiar with many of the exotic genera that have been previously defined. The elongated thorax and fore-wings, the relatively long 1st abdominal tergite, the fine but distinct sculpture of the tergite (2 + 3), and the longitudinal fovea running from the anterior ocellus between the bases of the antennae, and terminating at the base of the clypeus, would be the diagnostic characters of this new genus.

The following key will serve to separate the three New Zealand species.