One new genus and species of Ithonidae, Cretithone zhangi gen. et sp. nov., is described from the mid-Cretaceous Kachin amber. Cretithone gen. nov. is distinguished from other fossil ithonids by the combination of the following characteristics: exceptionally broad costal space; proximal branches of RP fused into a single vein and then fused with M; medial branches of RP fused with each other; simple basal M, with marginal forks; CuA divided into two main branches, the anterior branch with posteriorly directed subbranches and the posterior branch with anteriorly directed subbranches; and most proximal branches of CuP fused with adjacent branches. The new genus and species has been assigned to the Principiala genus-group by the fusion of the proximal branches of RP and the peculiar configuration of M and CuA. Variations in the forewing characteristics among the fossil ithonids are briefly discussed.

Four new genera with four new species and one new combination of Mantispidae are described from the Upper Cretaceous (Cenomanian) amber of northern Myanmar: Tholomantispa quinata gen. et sp. nov., Tholomantispa zhangzhiqiae comb. nov., Heteromantispa polytricha gen. et sp. nov., Trimantispa poseidoni gen. et sp. nov., and Tribelomantispa yangjiani gen. et sp. nov. These species exhibit unique morphological characteristics, such as scale-like setae on forewings, unique male genitalia structure, and specialized raptorial foreleg, which provide valuable information for the study of character transformation and adaptive evolution within Mantispidae. The scale-like setae on the forewings suggests potential secondary loss in extant taxa. Similarly, the documentation of processes on the forefemur across multiple genera introduces a novel morphological trait within Mantispidae, enriching our knowledge of their structural diversity.