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Cacoxenus Loew is redefined on the basis of the type species, C. indagator , which is redescribed (including characteristics of the genitalia) and for which a lectotype is selected. Paracacoxenus Hardy, type P. guttatus Hardy and Wheeler (Washington and Oregon), is allied to Cacoxenus, Gitona , and Gitonides .

As I have indicated in various publications on the Dacini, I cannot agree with the generic concepts which have been followed by most of the workers on this group. I prefer not to base genera upon secondary sexual characters, unless accompanied by ample supporting characters, preferably common to both sexes. I also prefer not to base genera upon single chaetotaxic characters, i. e., the presence or absence of certain bristles, in varying combinations, unless accompanied by supporting characters. In my detailed study of this group such variations and intergradations have been seen in the chaetotaxy that it is felt that these are not always reliable criteria.

Tomosvaryella frontata (Becker, 1897) is redescribed and illustrated from specimens reared from the Tamarix leafhopper, Opsius stactogalus Fieber, in Nice, France. In some respects it resembles a Dorylomorpha , but its wing venation places it in Tomosvaryella Aczel.

While working with local Therevidae, several species have come to the attention of the writer that seem to be undescribed. The material at hand consists of one new genus and two new species.