Trigonaspis pumiliventris

Dryophanta pumiliventris
Diplolepis pumiliventris
Belonocnema colorado
Trigonaspis radicis

D. pumiliventris was described from males only and ''from an unknown source'' although there is a specimen in the American Entomological Society collection marked '' co type'' bearing the label ''Ct.'' The galls are described as ''shrunken and distorted, probably soft and succulent when fresh, polythalamous, probably on oak.'' The writer has not seen the types but this description fits almost any preserved root gall of Trigonaspis very well. Bassett thought, however, that they were produced in the axils of leaves. Perhaps a branch had been inclosed in the sending to aid in the determination of the host plant and he thought they had fallen from the axils of this twig. Three flies from Bassett are in the United States National Museum from the Ashmead collection, and Ashmead had placed them in the genus Trigonaspis in the case. They can not be separated in size, coloration, or sculpture from the males of radicis Ashmead.

T. radicis was described from one male and four female specimens from Utah, June 20, 1885, the gall being on the roots of an unknown oak. The types are in the United States National Museum together with ten others determined by Ashmead as radicis collected by E. A. Schwarz at four different localities in Utah in June, 1893. The
writer has twenty males and two females which agree with these. They were taken at Colorado Springs, Colorado, on July 1, 1915, by sweeping on scrub oaks. As the males of these can not be separated from those of pumiliventris Bassett, radicis becomes a synonym of the older name.

Belonocnema colorado Gillette

Habitat. Dolores, Colorado. Pecos, New Mexico (T. D. A. Cockerell).

This species was described from a single specimen taken June 18, 1892, by Prof. C. P. Gillette. It is allied to B. treatae, but differs by the absence of the median groove on the mesothorax and infuscations on the radial veins. The gall is not known. It probably occurs on the roots of oak. The type is with Prof. Gillette.