It and other species that have been seen ovipositing insert their eggs between the stems and sheaths of root leaves of cattails or grasses. The ovipositors of Belocephalus species are stouter than those of other genera, but no one has observed their use. In a few species the smallest female known exceeds the largest male. The significance of such discrepant sizes is unexplained. Coneheads are often easy to find at night-by going to calls of males and by inspecting seed heads of grasses for feeding females.
Some species fly to lights.
Finding coneheads in the daytime is difficult. In this posture the insect resembles just another green or brown grass blade. Phonotaxis and aggression in the coneheaded katydid Neoconocephalus affinis . Burk T. 1982 . Evolutionary significance of predation on sexually signalling males.