New records of the caddisflies Diplectrona erinya Malicky, 2002 and Diplectrona extrema Banks, 1920 (Trichoptera, Hydropsychidae) from Thailand

The distributions of Diplectrona erinya Malicky, 2002 and Diplectrona extrema Banks, 1920 are somewhat limited. Diplectrona extrema has been known in some areas of the Indochina Peninsula archipelago and D. erinya only at the type locality in the north of Vietnam. We provide new records of these two species, which bring the number of Thai species of Diplectrona to 10. These two species were collected from a protected area in Thap Lan National Park. It is obvious that these two species occur at low densities and are probably rare in Thailand.