Here are the recent references i can find.  Enjoy.
Gould JL  (1980) The case for magnetic sensitivity in birds and bees (such as it
is). American Scientist. 68: 256-267.
 
Leucht T , Martin H  (1990) Interactions between e-vector  orientation and weak,
steady magnetic fields in the honeybee, Apis mellifera. Naturwissenschaften. 77:
130-133.
 
Schiff H  (1991) Modulation of spike frequencies by varying the ambient magnetic
field and magnetite candidates in bees (Apis mellifera). Comp. Biochem. Physiol.
100A: 975-985.
 
Thompson S, Lee R , Beckage N  Metabolism of parasitized Manduca sexta examined
by nuclear magnetic resonance. Archives of Insect Biochmistry and Physiology.
1-31.
 
Walker M , Bitterman M  (1989) Attached magnets impair magnetic field
discrimination by honeybees. J. exp. Biol. 141: 447-451
 
Walker M , Bitterman M  (1989) Short communication  Honey bees can be trained to
respond to very small changes in geomagnetic field intensity. J. Exp. Biol. 145:
489-494.
 
Walker M , Bitterman M  (1989) Conditioning analysis of magnetoreception in
honey bees. Bioelectromagnetics. 10: 261-275.
 
Walker M , Bitterman M  (1989) Short communication:honey bees can be trained to
respond to very small changes in geomagnetic field intensity. J. Exp. Biol. 145:
489-494.
 
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>From:         stephen j clark <[log in to unmask]>
>Subject:      Re: magnetite in bees
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>>
>>Has there been any current work on magnetite in honeybees and its role
>>in navigation/orientation?  Is it the concensus that this mechanism
>>exists?
>>
>>David Kesler
>>[log in to unmask]
>
>I think Jim Gould (Dept. of Biology, Princeton University, Princeton, NJ
>08544-1003, USA) has looked into this.
>
>Stephen Clark
>Vassar College