See 'info' under Cenocoeliinae. In addition, first metasomal segment length not long and slender, less than 2.8 times petiole width. Third metasomal segment smooth, not coarsely sculptured; occipital carina evenly curved in profile, not notably protruding posteriorly. Other than Cenocoelius and Capitonius, the only other cenocoeliine genus with these characteristics is Aulacodes Cresson, which is rare and only found in Florida and Cuba. It can be separated from the 2 common genera by medial length of the third metasomal tergite about 1.8 times longer than the second metasomal tergite.
Capitonus is found throughout the New World. Cenocoelius is Holarctic and Neotropical.
Most host records from North America are from long-horned beetle larvae.
Achterberg, C. van. 1994. Generic revision of the subfamily Cenocoelinae Szepligeti (Hymenoptera: Braconidae). Zoologische Verhandelingen Leiden 292:1-52.
Saffer, B. 1977. A new species of Cenocoelius from Costa Rica (Hymeoptera: Braconidae). Proceedings of the Entomological Society of Washington 79: 592-596.
Saffer, B. 1982. A systematic revision of the genus Cenocoelius (Hymenoptera, Braconidae) in North America, including Mexico. Polskie Pismo Entomologiczne 52:73-167.
Shaw, M. R. and T. Huddleston. 1991. Classification and biology of braconid wasps (Hymenoptera: Braconidae). Handbooks for the Identification of British Insects 7(11): 1- 126.