Original paper

Increased Nest Density of the Digger Wasp Bembix rostrata as a Response to Parasites and Predators (Hymenoptera: Sphecidae)

Larsson, Folke K

Entomologia Generalis Volume 12 Number 1 (1986), p. 71 - 75

12 references

published: Oct 1, 1986

DOI: 10.1127/entom.gen/12/1986/71

BibTeX file

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Solitary wasps are affected by a wide variety of organisms acting as parasites or predators. Observations in a nesting aggregation of the digger wasp Bembix rostrata Linnaeus 1758 revealed the fly Metopia leucocephala Rossi 1790 to be important as a nest parasite. The frequency of these parasitic flies correlated significantly with increased density of B. rostrata nests. Calculated per nest, however, the relative incidence of such animals was declining as nest density increased. The same tendency was noted for ants visiting the nesting area. These findings may support the hypothesis of gregarious nesting as a selfish herd mechanism against parasites and predators


Gregarious nestingselfish herdnest densityMetopia leucocephalaBembix rostrata