UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 12b-25
                           NOTIFICATION OF LATE FILING

                                  (Check One):

|_|Form 10-K |_|Form 20-F |_|Form 11-K |X|Form 10-Q |_|Form N-SAR |_|Form N-CSR

         FOR PERIOD ENDED:   April 30, 2007
                           ----------------

         |_| Transition Report on Form 10-K
         |_| Transition Report on Form 20-F
         |_| Transition Report on Form 11-K
         |_| Transition Report on Form 10-Q
         |_| Transition Report on Form N-SAR
         For the Transition Period Ended: _____________________________

         Nothing in this form shall be  construed  to imply that the  Commission
has verified any information contained herein.

         If the  notification  relates to a portion of the filing checked above,
identify the Item(s) to which the notification relates:


PART I - REGISTRANT INFORMATION

METALLINE MINING COMPANY
--------------------------------------------------------------
Full Name of Registrant


--------------------------------------------------------------
Former Name if Applicable

1330 E. Margaret Ave.
--------------------------------------------------------------
Address of Principal Executive Office (Street and Number)

Coeur d'Alene, ID 83815
--------------------------------------------------------------
City, State and Zip Code

PART II - RULES 12b-25(b) and (c)

If the subject report could not be filed without  unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check box if appropriate)

|X|      (a)      The reasons described in reasonable detail in Part III of this
                  form could not be eliminated  without  unreasonable  effort or
                  expense; and

|X|      (b)      The subject  annual  report,  semi-annual  report,  transition
                  report on Form 10-K,  Form 20-F,  Form 11-K or Form N-SAR,  or
                  portion  thereof,  will be filed on or  before  the  fifteenth
                  calendar day following the prescribed due date; or the subject
                  quarterly report of transition report on Form 10-Q, or portion
                  thereof  will be filed on or  before  the fifth  calendar  day
                  following the prescribed due date; and

|_|      (c)      The  accountant's  statement or other exhibit required by Rule
                  12b-25(c) has been attached if applicable.



PART III - NARRATIVE

State below in reasonable  detail the reasons why the Form 10-K, Form 20-F, Form
11-K, Form 10-Q, Form N-SAR, or the transition report or portion thereof,  could
not be filed within the prescribed time period. (Attach extra sheets if needed.)

         The  Company  is  short-staffed  and could not  compile  its  financial
information in a timely manner in order to allow management to complete a review
of the financial statements by the deadline.


PART IV - OTHER INFORMATION

         (1) Name and  telephone  number of person to  contact in regard to this
notification:

          Theresa M. Mehringer, Esq.      (303)            796-2626
          --------------------------      -----            --------
                 (Name)               (Area Code)      (Telephone Number)

         (2) Have all other periodic  reports required under Section 13 or 15(d)
of the Securities  Exchange Act of 1934 or Section 30 of the Investment  Company
Act of 1940 during the preceding 12 months (or for such shorter) period that the
registrant was required to file such report(s) been filed?  If the answer is no,
identify report(s). |X| Yes |_| No

         (3) Is it  anticipated  that  any  significant  change  in  results  of
operations  from the  corresponding  period  for the last  fiscal  year  will be
reflected by the  earnings  statements  to be included in the subject  report or
portion thereof?  |X| Yes |_| No If so, attach an explanation of the anticipated
change,  both  narratively and  quantitatively,  and, if appropriate,  state the
reasons why a reasonable estimate of the results cannot be made.


                            METALLINE MINING COMPANY
                            ------------------------
                  (Name of Registrant as specified in charter)

has  caused  this  notification  to be signed on its  behalf by the  undersigned
hereunto duly authorized.


Date: June 14, 2007                      By:      /s/ Merlin Bingham
                                             --------------------------------
                                                Merlin Bingham, President


                                    ATTENTION

Intentional  misstatements  or omissions  of fact  constitute  Federal  Criminal
Violations (See 18 U.S.C. 1001).





                                      -2-




                                 ATTACHMENT 1 TO
                                   FORM 12b-25
                           NOTIFICATION OF LATE FILING

For the six months ended April 30, 2007,  the Company had an increase in general
and  administrative  expenses,  and therefore a greater net loss from operations
compared to the six months  ended April 30,  2006.  Since the  beginning  of the
current fiscal year,  the Company  received  funding from one private  placement
that  closed in March 2007.  The funding  provided  the Company  with  financial
resources  necessary to increase its  operations and drilling  projects,  and to
increase  its  exploration-related  expenditures.  As a  result,  the  Company's
operations  for the six months  ended April 30,  2007 are  greater  than the six
months  ended  April 30,  2006.  This  resulted in a net loss for the six months
ended April 30, 2007 of approximately  1.5 times the net loss for the six months
ended April 30, 2006.




                                      -3-