SCHEDULE 14A
                                 (Rule 14a-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT
                            SCHEDULE 14A INFORMATION

           Proxy Statement Pursuant to Section 14(a) of the Securities
                   Exchange Act of 1934 (Amendment No.______)

_X_ Filed by the Registrant
___ Filed by a Party other than the Registrant
___ Check the appropriate box

___ Preliminary Proxy Statement                ___  Confidential, For Use of
                                               the Commission Only (as permitted
                                               by Rule 14a-6(e)(2))

___  Definitive Proxy Statement
_X_  Definitive Additional Materials
___  Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12

                       New Century Energies, Inc.
- -------------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box)
  _X_ No fee required

  ___ Fee computed on table below per Exchange Act Rules 14A-6(i )(1) and 0-11

(1)   Title of each class of securities to which transaction applies

- -------------------------------------------------------------------------------
(2) Aggregate number of securities to which transaction applies

- -------------------------------------------------------------------------------
(3)  Per unit price or other underlying value of transaction  computed  pursuant
     to  Exchange  Act Rule 0-11 (set  forth the  amount on which the  filing is
     calculated and state how it was determined)

- -------------------------------------------------------------------------------
(4) Proposed maximum aggregate value of transaction.

- -------------------------------------------------------------------------------
(5)   Total fee paid

- -------------------------------------------------------------------------------
___   Fee paid previously with preliminary materials
- -------------------------------------------------------------------------------

___  Check box if any part of the fee is offset as provided by Exchange Act Rule
0-11(a)(2) and  identify  the  filing  for  which the  offsetting  fee was paid
previously.  Identify the previous filing by registration  statement  number, or
the form or schedule and the date of its filing

(1)   Amount previously paid
- -------------------------------------------------------------------------------
(2)   Form, Schedule or Registration Statement no
- -------------------------------------------------------------------------------
(3)   Filing Party
- -------------------------------------------------------------------------------
(4)   Date Filed
- -------------------------------------------------------------------------------





June 10, 1999


Dear Fellow Shareholder:

We have  previously  sent to you proxy  material for the Special  Meeting of New
Century Energies,  Inc. to be held on June 28, 1999. Your Board of Directors has
unanimously  recommended  that the  shareholders  vote in favor of the  proposed
merger with Northern States Power Company.

Since  approval  of the merger  requires  affirmative  vote of a majority of the
outstanding  shares of common stock, your vote is important,  no matter how many
or how few shares you own.  If you have not  already  done so,  please vote your
shares by marking,  signing and dating the enclosed  proxy card and returning it
in the envelope provided.  You may also vote your shares by telephone or through
the Internet by following the instructions provided on the enclosed proxy card.


Very truly yours,


/s/ Bill D. Helton
Bill D. Helton


            If you have any questions, or need assistance in voting
                 your shares, please call our proxy solicitor,

                          INNISFREE M&A INCORPORATED
                          TOLL-FREE, AT 1-877-750-5836

                                IMPORTANT NOTE:
  If you hold your shares through a bank or broker, you may be able to vote by
                         telephone or via the Internet.
            Please call Innisfree at 1-877-750-5836 for assistance.