Revision of Caloapenesia (Hymenoptera, Bethylidae), with description of sixteen new species.

Caloapenesia Terayama is characterized by having the costal cell very long, the stigma of forewing absent, and the paramere deeply divided into two arms. Three species of this genus were known from Oriental Region. Sixteen new species from Indonesia, Thailand and Vietnam: C. ana sp. nov., C. arbeni sp. nov., C. diba sp. nov., C. edas sp. nov., C. heira sp. nov., C. inyara sp. nov., C. jailuna sp. nov., C. lani sp. nov., C. launeci sp. nov., C. leptata sp. nov., C. mugra sp. nov., C. nadaili sp. nov., C. paruwa sp. nov., C. rikawa sp. nov., C. sabeli sp. nov. and C. supra sp. nov. are described and illustrated. A character list for delimiting species and comments about generic male characters as a key to males are given.