diff --git a/docs/ascii_encyclopedia.txt b/docs/ascii_encyclopedia.txt
index db60dbc..2972c1e 100644
--- a/docs/ascii_encyclopedia.txt
+++ b/docs/ascii_encyclopedia.txt
@@ -1,4 +1,4 @@
-a -             A -
+a - insects     A -
 b -             B -
 c - chickens    C -
 d - canines     D -
diff --git a/raws/mobs.json b/raws/mobs.json
index 5137ea4..75ee1ed 100644
--- a/raws/mobs.json
+++ b/raws/mobs.json
@@ -326,6 +326,57 @@
         "attacks": [{ "name": "bites", "hit_bonus": 0, "damage": "1d2" }],
         "loot": { "table": "scrolls", "chance": 0.05 }
     },
+    {
+        "id": "ant_worker",
+        "name": "worker ant",
+        "renderable": { "glyph": "a", "fg": "#ca7631", "bg": "#000000", "order": 1 },
+        "flags": ["SMALL_GROUP"],
+        "level": 2,
+        "bac": 3,
+        "speed": 18,
+        "vision_range": 16,
+        "attacks": [{ "name": "bites", "hit_bonus": 0, "damage": "1d4" }],
+        "loot": { "table": "food", "chance": 0.05 }
+    },
+    {
+        "id": "ant_soldier",
+        "name": "soldier ant",
+        "renderable": { "glyph": "a", "fg": "#ca3f26", "bg": "#000000", "order": 1 },
+        "flags": ["SMALL_GROUP"],
+        "level": 3,
+        "bac": 3,
+        "speed": 18,
+        "vision_range": 16,
+        "attacks": [
+            { "name": "bites", "hit_bonus": 0, "damage": "2d4" },
+            { "name": "stings", "hit_bonus": 0, "damage": "3d4" }
+        ],
+        "loot": { "table": "food", "chance": 0.05 }
+    },
+    {
+        "id": "caterpillar_cave",
+        "name": "caterpillar",
+        "renderable": { "glyph": "a", "fg": "#6b6b6b", "bg": "#000000", "order": 1 },
+        "flags": ["SMALL_GROUP"],
+        "level": 1,
+        "bac": 3,
+        "speed": 9,
+        "vision_range": 16,
+        "attacks": [{ "name": "bites", "hit_bonus": 0, "damage": "1d3" }],
+        "loot": { "table": "food", "chance": 0.05 }
+    },
+    {
+        "id": "caterpillar_giant",
+        "name": "giant caterpillar",
+        "renderable": { "glyph": "a", "fg": "#b9aeae", "bg": "#000000", "order": 1 },
+        "flags": ["SMALL_GROUP"],
+        "level": 2,
+        "bac": 7,
+        "speed": 9,
+        "vision_range": 16,
+        "attacks": [{ "name": "bites", "hit_bonus": 0, "damage": "1d6" }],
+        "loot": { "table": "food", "chance": 0.10 }
+    },
     {
         "id": "jackal",
         "name": "jackal",
diff --git a/raws/spawn_tables.json b/raws/spawn_tables.json
index a1e8d3b..aeffbcd 100644
--- a/raws/spawn_tables.json
+++ b/raws/spawn_tables.json
@@ -91,6 +91,8 @@
             { "id": "kobold_large",             "weight": 1,    "difficulty": 2}, 
             { "id": "rat_giant",                "weight": 2,    "difficulty": 2}, 
             { "id": "coyote",                   "weight": 4,    "difficulty": 2},
+            { "id": "caterpillar_cave",         "weight": 2,    "difficulty": 2}, 
+            { "id": "caterpillar_giant",        "weight": 2,    "difficulty": 3},
             { "id": "zombie_orc",               "weight": 1,    "difficulty": 3},
             { "id": "zombie_dwarf",             "weight": 1,    "difficulty": 3},
             { "id": "gnome",                    "weight": 1,    "difficulty": 3},
@@ -102,8 +104,10 @@
             { "id": "dwarf",                    "weight": 3,    "difficulty": 4},
             { "id": "orc_hill",                 "weight": 1,    "difficulty": 4},
             { "id": "horse_little",             "weight": 2,    "difficulty": 4},
+            { "id": "ant_worker",               "weight": 3,    "difficulty": 4},
             { "id": "dog",                      "weight": 1,    "difficulty": 5}, 
             { "id": "wolf",                     "weight": 2,    "difficulty": 6},
+            { "id": "ant_soldier",              "weight": 2,    "difficulty": 6},
             { "id": "orc_captain",              "weight": 1,    "difficulty": 7},
             { "id": "dog_large",                "weight": 1,    "difficulty": 7},
             { "id": "horse",                    "weight": 2,    "difficulty": 7},