Primus - Amos Moses 
Chord structures:
A7:e-0-  B7:e-X-   D7:e-X-   E7:e-X-   A:e-X-   C:e-X   D:e-X
   B-2-     B-4-      B-7-      B-9-     B-X-     B-X     B-X
   G-0-     G-X-      G-X-      G-X-     G-6-     G-5     G-7
   D-2-     D-4-      D-7-      D-9-     D-5-     D-5     D-7
   A-x-     A-2-      A-5-      A-7-     A-0-     A-3     A-5
   E-x-     E-X-      E-X-      E-X-     E-X-     E-X     E-X

The first muted part is just a muted G then A I think.

Here is the main riff:
e--------------------------------
B---------------------------------
G----------2----5p2------2-----5p2
D---------------------5-----------
A-----0---------------------------
E--3b-----------------------------

Amos Moses was a Cajun...
A7,B7,D7
Repeat main riff
A7,B7,D7
Repeat main riff
E7,D7,A x2
E,C,D


I think this riff is on bass, but it can be played on guitar like this:
e------------------------
B------------------------
G--7---5-----------------
D---------7----5---------
A------------------8----5
E------------------------

Right after that there is this quiet riff
e--------------------------------------------------------------------
B---------------------------8-------------------------8--------------
G-----------5-------------------------------5------------7p6p5------
D--5h6h7--------7------5/7--------0--5h6h7-----7--5-------------7---
A------------------------------0-------------------------------------
E ------------------------------------------------------------------8

Repeat the main riff