In the present study, two new species of Pimplinae, Dolichomitus jataisp. n. and Dolichomitus moacyrisp. n. are described, and the distribution range of Dolichomitus annulicornis (Cameron, 1886) is extended. The specimens were collected using Malaise traps in areas of Atlantic forest and Brazilian savannah (cerrado) in southeastern Brazil and are deposited in a Brazilian collection (DCBU).

The genus Dolichomitus Smith, 1877 is recorded from Vietnam for the first time with description of a new species, D. lami sp. nov., from Hoang Lien National Park, Lao Cai Province. Besides, D. melanomerus (Vollenhoven) is recorded as new for the country from specimens collected in Tam Dao National Park, Vinh Phuc Province and Hang Kia-Pa Co Nature Reserve, Hoa Binh Province.

Two species of Dolichomitus Smith, 1877 emerged from the trunks Juglans mandshurica Maxim. in Kuandian and Benxi Manzu Autonomous Counties, Liaoning, Palaearctic part China. One new species, D. juglanse Sheng #38; Li sp. nov., reared Menesia flavotecta Heyden, 1886 Mesosa myops (Dalman, 1817) (Cerambycidae), is described illustrated. A key to known China provided.