. Bulletin of the Natural History Museum Geology. 64 ANTROPOV cell and almost complete reduction of the submarginal, discoidal, and subdiscoidal cells, and secondly the proximal removal of only the externoposterior corner of the medial cell. Each of the features taken separately are found in various recent Sphecidae (acute and short marginal cell in Pemphredoninae, Ammoplanini; more or less disappearing submarginal, discoidal, and subdiscoidal cells in Crabroninae, Miscophini; almost triangular hindwing medial cell in Crabroninae, Crabronini). Simultaneous combination of these features is
. Bulletin of the Natural History Museum Geology. 64 ANTROPOV cell and almost complete reduction of the submarginal, discoidal, and subdiscoidal cells, and secondly the proximal removal of only the externoposterior corner of the medial cell. Each of the features taken separately are found in various recent Sphecidae (acute and short marginal cell in Pemphredoninae, Ammoplanini; more or less disappearing submarginal, discoidal, and subdiscoidal cells in Crabroninae, Miscophini; almost triangular hindwing medial cell in Crabroninae, Crabronini). Simultaneous combination of these features is not found in any known recent or fossil Sphecidae. All the more, it is not found in Ampulicinae with their typically complete venation of both wings having minimum specialization. Another important (and unique) difference of the new tribe from all known Ampulicinae is the edentate tarsal claws. Finally, Apodolichurini trib. nov. differs from other Ampulicinae by its ovally elongate propodeum without distinct bend between dorsal and posterior parts and also by the spherical head and strongly elongate antennal pedicel (observable in only one of the species described below, the head was not preserved in the second species). Remarks. The reduction of the forewing venation is probably related to reduction of body size (maximum length of the discovered species is hardly more than mm). At the same time, the character- istic shape of the pronotum, expressed adlateral lines, and two midtibial apical spurs allow the placement of both described species in the subfamily Ampulicinae. Genus APODOLICHURUS nov. Etymology. The generic name is derived from the Greek prefix apo-, meaning 'from', and the generic name Dolichurus; it is mascu- line. Type species. ignated. Apodolichurus sphaerocephalus sp. nov., here des- DlAGNOSlS. Head spherical; palpi not elongate; antennal sockets not covered by frontal prominences; antennae of female 12-seg- mented, long and filiform, with pedicel almost as
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