瘦姬蜂 Ophion obscuratus
Size is about 2.5cm
ID Credit : Blackdog To Chan
same photos as observation 847596
finally got a shot of a freshly emerged wasp
The Ichneumonoidea are insects classified in the hymenopteran suborder Apocrita. The superfamily is made up of the ichneumon wasps (sometimes inaccurately called "ichneumon flies"); family Ichneumonidae and the braconids (family Braconidae). Like other parasitic wasps, they were long placed in the "Parasitica", variously considered as an infraorder or an unranked clade, but actually not a monophyletic group.