Brief Summary
provided by Catalog of Hymenoptera in America North of Mexico
All members of this family are parasites in the eggs of other insects. Their thoracic structures show them to have affinities with the Eulophidae, but they must have diverged from the eulophid stem at some remote time in chalcidoid evolution. Since all trichogrammatids have 3-segmented tarsi, lack the strigil of the foretibia, have greatly reduced antennae, never have the abdomen petiolate, and the forewing usually bears characteristic lines of cilia, they are widely separated from their nearest relatives in the Eulophidae.
- bibliographic citation
- Catalog of Hymenoptera in America North of Mexico. 1979. Prepared cooperatively by specialists on the various groups of Hymenoptera under the direction of Karl V. Krombein and Paul D. Hurd, Jr., Smithsonian Institution, and David R. Smith and B. D. Burks, Systematic Entomology Laboratory, Insect Identification and Beneficial Insect Introduction Institute. Science and Education Administration, United States Department of Agriculture.
