Callirhytis crassicornis, new species.

A peculiar, irregular, somewhat triangulated, hard, finely rugose, blackish seed-like gall, issuing from the twig, most of them being covered with a whitish efflorescence.

The gall, structurally, is similar to that produced by A. conifera, Ashmead, and the part embedded in the twig is triangularly shaved off to a sharp edge. The fly escapes from its larval cell through a hole perforated in the side.

Four female specimens received through Mr. F.B. Hough, reared October 10, 1884.

- William Ashmead: (1896) Descriptions of new Cynipidous Galls and Gall-Wasps in the United States National Museum^©

Reference: https://www.biodiversitylibrary.org/page/7294918