This paper concerns HH-relations in the lattices P(M) of all projections of W*-algebras M. If M is a finite algebra, all these relations are generated by trails in P(M). If M is an infinite countably decomposable factor, they are either generated by trails or associated with them.

The study revealed that there was quantitative recruitment in colonies of Amitermes evuncifer, whenever food was discovered by the scouting foragers. Discovered food stimulated the termites to accelerate their running speed, to and from the food source. Increased trail-laying activity, accelerated movement and carrying of food by the returning workers facilitated recruitment of other confederates from their nest. These activities equally directed the recruited termites to the food source.

Amitermes evuncifer was observed to regulate traffic in relation to newly discovered food source. The results showed that there was rapid communication between the termites of food source within 3–4 min. It was further observed that the trail to newly found food source did not become dominant over the trail to the already existing food source. The results showed clearly the effect of food on vital activities of termites.

The activity pattern of the ant, Cataulacus guineensis F. Smith, was found to be diurnal; trailing starts around 6.00 a.m. and ends around 6.00 p.m. The effect of meteorological factors on the activity pattern of the ant was also investigated and rainfall was found to be the most important factor influencing the ant's activity. The ant was found to be generally very active throughout the year, except when the harmattan conditions were very severe.

The species was found to be mainly a canopy forager, although occasionally it might forage on the ground. The mean foraging space was 555.0 m2; but when nests (colonies) were close together, overlapping of foraging spaces did occur.