Hologastran abdomen is present in

Hologastran abdomen is present in Cantharidae.
The soldier beetles (Cantharidae) are relatively soft-bodied, straight-sided beetles. They are cosmopolitan in distribution.
Soldier beetles often feed on both nectar and pollen as well as predating other small insects. The larvae are often active, velvety, often brightly-colored, and they feed on the ground, hunting snails and other small creatures.