[2] Ischnoceros rusticus is an ichneumonid parasitoid wasp that feds on Rhagium mordax larvae.
[5] The beetles' bodies are covered with small yellow hairs,[6] although one distinguishing feature of the species is two bald spots on its elytra.
[7] Rhagium mordax has a long, narrow head with a distinct neck.
The insect's face bears a suture and the temples are elongate with some stiff hairs.
The antennae are relatively short and the first segment is wider at its tip and longer.