. Bulletin of the Natural History Museum Geology. DIGGER WASPS IN BURMESE AMBER 67 dibles and comparatively small number of hamuli. Among recent genera it resembles Aphelotoma Westwood, 1841 and Austrotoma Riek, 1955 in having the separated lower frontal prominences, differing from them by the medially carinate triangular clypeus, apically bidentate mandibles, elongate palpi, strong lateral ridges of the pronotal collar, absence of the omaulus, sternaulus, tarsal plantulae, and forewing vein lr, by the narrow forewing submarginal cell III and the relative positions of the recurrent veins, and
. Bulletin of the Natural History Museum Geology. DIGGER WASPS IN BURMESE AMBER 67 dibles and comparatively small number of hamuli. Among recent genera it resembles Aphelotoma Westwood, 1841 and Austrotoma Riek, 1955 in having the separated lower frontal prominences, differing from them by the medially carinate triangular clypeus, apically bidentate mandibles, elongate palpi, strong lateral ridges of the pronotal collar, absence of the omaulus, sternaulus, tarsal plantulae, and forewing vein lr, by the narrow forewing submarginal cell III and the relative positions of the recurrent veins, and by the developed hindwing jugal lobe and the abdominal petiole. Among fossil representatives of the subfamily, Cretampulex gen. nov. resembles Protodolichurus in having the separated lower frontal prominences, the medially carinate clypeus, and similar forewing venation, differing from it by the triangular clypeus, longer pronotum with the expressed lateral ridges of its collar, absence of tarsal plantulae and forewing vein lr, by the narrow submarginal cell III, the form of the hindwing medial cell and confluent cu-a, by the distinct bend between the propodeal dorsal and hind sides, and by the distinct abdominal petiole. Cretampulex gracilis sp. nov. Figs 17-20 Etymology. The species name is derived from the Latin mascu- line adjective gracilis, meaning 'slender'; the name is a reference to the shape of the female body. Holotype. Department of Palaeontology of The Natural History Museum (London), In. 19123(5); completely preserved female speci- men lying in the centre (Fig. 20) of the polished from the both sides, irregularly ovate, flat, and broad wedge-shaped sample of Burmese amber (probably UpperCretaceous),containingnumerous inclusions. Description. Female. Head oval, higher than wide; clypeus trian- gular, with distinct medial carina; frons weakly convex, with narrow medial furrow; separated frontal prominences small, covering antennal sockets above from inside; malar sp
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