Here are all 15 bugs and which rock to get them:

Azure Bug - Raw Food Area and Vine Area Rocks

Orange Bug - Sewing Area and Easel Area Rocks

Turquoise Bug - Sewing Area Rock -PERFECT

Green Bug - Vine Area - PERFECT and Easel Area Rocks

White Bug - Raw Food Area and Canoe End Area Rocks

Brown Bug - Sewing Area Rock

Red Bug - Canoe End Area Rock

Tan Bug - Sewing Area Rock - PERFECT

Yellow Bug - Sewing Area and Easel Area Rocks

Purple Bug - Canoe End Area Rock - PERFECT

Fuchsia Bug - Vine Area Rock - PERFECT

Black Bug - Raw Food Area, Vine Area, Canoe End Area and Easel Area Rocks

Pink Bug - Vine Area Rock

Blue Bug - Raw Food Area and Canoe End Area Rocks - PERFECT

Jade Bug - Easel Area Rock - PERFECT