Dear Peter
Beetles are not mapped on the website, nor are other groups depending on what data is available in digitised format. This does not mean at all that the group does not have large numbers of records in the county - pine ladybird for example is widespread. The rare and scarce species were summarised by Peter Hammond in the Essex Naturalist 16 (1999) and 17 (2000) (these can be searched and read using the on-line archive Unlocking+the+Natural+History+Heritage+of+Essex), but of course there are many hundreds/thousands of other beetles recorded in the county.