44
The Essex Naturalist
Introduction
For the purpose of this provisional list, we regard the period from 1990 to 1995
inclusive as the "present" period. For records made prior to the year 1990, the
date of capture is generally indicated. Although some records made from 1990
onwards are dated in the text it may be taken that all undated records listed here
were made in the period 1990 to 1995. We have credited collectors of specimens
and authors of published records throughout. We have, however, omitted our
own names for reasons of space and readability; where a record is not attributed
to a particular person it should be assumed that one or both of the present
authors was the recorder. For all our own records a voucher specimen is available
for inspection by bona fide researchers. Whilst vouchers are also available for
much of the recent material reported to us by other parties, we have not in all
cases examined this ourselves. For the literature records, however, voucher
specimens probably do not exist (we have not yet enquired) and, consequently,
we are unable to verify published records. However, this having been made
clear, we have no particular doubt about the validity of the records which we
include in this provisional county list.
Map 1. Relative numbers of recorded species of aceulate Hymenoptera in Essex hy ten-
kilometre square. The darker the square, the greater the number of species recorded.