Elite workers andthe colony-level pattern of labor division in the yellowjacket wasp,Vespula germanica Hurd, C.R.,Nordheim, E.V. & Jeanne, R.L. 827
Substitution of silk stabilimenta for egg sacsby Allocyclosa bifurca (Araneae: Araneidae) suggests that silkstabilimenta function as camouflage devices Eberhard, W.G. 847
Social and spatial aspects ofmale subgrouping in a community of wild chimpanzees Mitani, J.C. & Amsler, S.J. 869
Influence of advertisementcalls on reproductive success in the male midwife toad Alytesobstetricans Lodé, T. & Le Jacques, D. 885
Individualdifferences in response to sibling birth among free-ranging yearlingrhesus monkeys (Macaca mulatta) onCayo Santiago DeVinney, B.J.,Berman, C.M. & Rasmussen, K.L.R. 899
Self-odourrecognition in European storm-petrel chicks De León, A.,Mınguez, E. & Belliure, B. 925
Increased per-capita investmentin egg production by female apple snails in the presence of predatorycommon carp Ichinose, K. & Tochihara, M. 935
Microgeographic songvariation in island populations of the white-crowned sparrow(Zonotrichia leucophrys nutalli): innovation throughrecombination Slabbekoorn, H., Jesse, A.& Bell, D.A. 947VSP, P.O. Box 346, 3700 AH Zeist, The Netherlands Tel: +31 30 692 5790, Fax: +31 30 693 2081 E-mail: vsppub@brill.nl
