Table 1.

Classification of Hymenoptera adopted in this checklist, with numbers of confirmed British and Irish species in the 1978 and current checklists (not including known introductions that have failed to establish in the wild). Note that the spelling of Trigonalidae and Trigonaloidea, as opposed to 'Trigonalyidae', follows Aguiar et al. (2013).

Series	Superfamily	Family	1978	2014
sawflies	Cephoidea	Cephidae	12	13
	[Orussoidea	Orussidae	1?	1?]
	[Pamphilioidea	Megalodontesidae	3?	1?]
		Pamphiliidae	19	20
	Siricoidea	Siricidae	6	6
	Tenthredinoidea	Argidae	15	19
		Blasticotomidae	1	1
		Cimbicidae	15	17
		Diprionidae	9	9
		Tenthredinidae	390	446
	Xiphydrioidea	Xiphydriidae	2	3
	Xyeloidea	Xyelidae	2	3
parasitoids	Ceraphronoidea	Ceraphronidae	26	28
		Megaspilidae	65	64
	Chalcidoidea	Aphelinidae	35	39
		Azotidae	1	1
		Chalcididae	6	10
		Encyrtidae	191	221
		Eucharitidae	1	1
		Eulophidae	384	508
		Eupelmidae	13	15
		Eurytomidae	90	96
		Mymaridae	82	95
		Ormyridae	3	4
		Perilampidae	7	9
		Pteromalidae	523	567
		Signiphoridae	2	2
		Tetracampidae	7	8
		Torymidae	68	104
		Trichogrammatidae	27	37
	Cynipoidea	Cynipidae	79	86
		Figitidae	123	128
		Ibaliidae	1	2
	Diaprioidea	Diapriidae	295	276
	Evanioidea	Aulacidae	1	1
		Evaniidae	1	1
		Gasteruptiidae	5	5
	Ichneumonoidea	Braconidae	1149	1335
		Ichneumonidae	2003	2578
	Mymarommatoidea	Mymarommatidae	1	1
	Platygastroidea	Platygastridae	259	362
	Proctotrupoidea	Heloridae	3	3
		Proctotrupidae	30	39
	Trigonaloidea	Trigonalidae	1	1
	Apoidea - 'spheciformes' wasps	Crabronidae	109	121
		Sphecidae	4	4
	Apoidea - bees	Andrenidae	67	68
		Apidae	65	69
		Colletidae	20	21
		Halictidae	57	57
		Megachilidae	34	39
		Melittidae	6	6
	Chrysidoidea	Bethylidae	13	13
		Chrysididae	31	31
		Dryinidae	44	35
		Embolemidae	2	1
	Vespoidea	Formicidae	42	51
		Mutillidae	3	3
		Pompilidae	41	43
		Sapygidae	2	2
		Tiphiidae	3	3
		Vespidae	30	33
Totals	20	62	6526	7764