Dioryctria tumicolella is a species of snout moth in the genus Dioryctria. It was described by Mutuura, Munroe and Ross in 1969, and is known from British Columbia, Canada, but is possibly present in all of north-western North America. The wingspan is 12.5–15 mm. Adults are black and white, with only a few brownish-red scales in the subbasal area. The larvae have been recorded feeding within blister rust (Peridermium) swellings on Pinus ponderosa.