Belawan (Sumatra, Indonesia; gazetteer estimate 3.78°, 98.69°), right and left of the road Medan-Belawan (1927/1933), at the entrance of the village in the immediate vicinity of the native houses, in dry soil made up of fine gray-brown clayey sand, rinsed by water only in the highest tides, living in galleries under the surface to a depth of 20-30 cm