The forest regions of Cochin-China harbour the tiger, panther, leopard, tiger-cat, ichneumon, wild boar, deer, buffalo, rhinoceros and elephant, as well as many varieties of monkeys and rats.
Genera: Cynips, Tenthredo, Sirex, Ichneumon, Sphex, Chrysis, Vespa, Apis, Formica, Mutilla.
The common ichneumon is rare.
The ichneumon pierces the body of a caterpillar and lays her eggs where the grubs will find abundant animal food.
No group of terrestrial insects escapes their attacks - even larvae boring in wood are detected by ichneumon flies with excessively long ovipositors.