32 
Psyche 
March 
Busu-Bupu regions were almost connected by continuous 
forest even as late as 1955. There is no reason to believe 
Figure 1. Map of the Lae area in 1955, showing Didiman Creek and 
the Busu-Bupu area, two of the collecting stations studied with respect 
to local distribution of species. The third station, Bubia, is located 12.5 
kilometers to the northwest of the town of Lae. 
Explanation of Plate 4 
Plate 4. Floor of primary medium-aspect rain forest near lower 
Busu River. An overhead tree has just been felled to allow in an unusual 
amount of sunlight. The exposed portion of the machete is approximately 
20 inches, or 50 centimeters, in length. The greatest concentration of 
species and individual colonies to be found anywhere in New Guinea nest 
in small pieces of rotting wood in this situation. 
