From Greek gonia angle. In vertebrate anatomy, gonion (plural gonia) is the angle of the jaw (Internet searches).
Numbers
28 species in North America listed in the catalog by O'Hara and Wood
Size
circa 11 mm (Gonia frontosa)
Life Cycle
Parasitoids of caterpillars, especially Noctuidae (UK Tachinids). Eggs are laid on the caterpillar food plant, and then ingested by the caterpillar (personal communication to user Cotinis, May 2008).
Internet References
taxonomic placement; PDF doc in subfamily Exoristinae, tribe Goniini, plus list of species and synonyms (James O'Hara and Monty Wood, Checklist of Tachinidae of America North of Mexico, 2004)
