Abstract
The response behaviour of ant, Pheidologeton diversus was studied following interruption of the trail line with an elongate and a circular object across its path. It was observed that ants could not continue to move along the trail line in case of both the obstructions causing chaos and crowding at the point of intersection with the object. However, in the case of the liner object they were found to rejoin the broken trail by creating two distinct paths, one parabolic and another straighter one with a acute U turn along the object. In both cases, the paths were created towards the shorter section of the obstacle. While in the case of the circular object, a semicircular path was formed along the circumference of the object. There was no distinct bifurcation as in the case of the linear object.