The frequency and timing of swarming and absconding of the giant honey bee Apis dorsata F. at 5 perennial nesting sites located in and around Bangalore district during 1986-88 are determined. The percentages of swarming and absconding are very high and both these migratory activities occur regularly and at definite times of the year. Swarming was noticed both during October-November and in April, while absconding was observed during May to July. Swarming and absconding together caused migration in Apis dorsata.

R: substituted phenyl, R 1 : H, CH 3 . Abstract A facile and highly efficient method for the regioselective one-pot synthesis of a series of novel 1-(substituted phenyl)-2-(4-(trimethylsilyl)-1H-1,2,3-triazol-1-yl)ketones from 2-bromo-1-(substituted phenyl)ketones, sodium azide, and trimethylsilyl acetylene, through Cu (I) catalyzed 1,3-dipolar [3+2] cycloaddition reaction is reported. The reaction proceeds smoothly in 40% aqueous

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The asymmetric unit of the title compound, C15H21N3OSi, contains two mol­ecules with similar conformations (r.m.s. overlay fit for the 20 non-H atoms = 0.163 Å). The dihedral angles between the planes of the 1,2,3-triazole and 2,4-di­methyl­benzene rings are 27.0 (3) and 19.5 (3)°. In the crystal, mol­ecules are linked by very weak C—H⋯O and C—H⋯N hydrogen bonds to generate [100] chains. The chains are cross-linked by C—H⋯π inter­actions.

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