Pristaulacus erythrocephalus Cameron 1905
This treatment documents Pristaulacus erythrocephalus using a male from Songkhla and a female from Khao Pu-Khao Ya National Park, Trang. The large wasp has a reddish-orange head and thorax with black posterior structures and diagnostic morphology. A Thai barcode differed 18.51% from its nearest Aulacidae sequence in BOLD. The record supports a wider Southeast Asian distribution; the host is unknown.