In reference to Dr. Kevan's question about Foraging Distance. Interesting data concerning this point were also considered in the following works: - Knafl (1953): "Ueber die Flugweite und Entfernungsmeldung der Bienen". Z. Bienenforsch. 2, 131-140. - Levin & Glowska-Konopacka (1963): "Responses of foraging honeybees in alfalfa to increasing competition from other colonies". J. Apic. Research 2, 33-42. These papers were analyzed in Dr. J. Nunez's work "Honeybee Foraging Strategies in Relation to its Distance from the Hive and the Rate of Sugar Flow" (J. Apic. Research 21, 139-150, 1982). As pointed out by Ed Southwick, there is certainly a relationship between the forager density and the foraging area and this was plotted in Nunez's paper. He founds coincident representations (Fig. 9) of the distribution of foragers as a function of the radius of the exploited area. The cumulative number of foragers in the field increases almost proportionately with the radius of the exploited area up to about 1000 m from the hive but beyond this distance, the increment is small. These data are anal yzed in relation to the sugar (energy) gain and the distance of the source from the hive. Cheers, Martin Giurfa Lab. of Behavioural Physiology Dept. of Biological Sciences - FCEyN University of Buenos Aires 4o piso, Pab. II, Cdad Universitaria - CP 1428 Buenos Aires ARGENTINA --- Insectos Sociales inssoc