Xvi INTRODUCTION. 

of often synonymous British species to amount to over four hundred in 
1901, now greatly reduced through careful comparison of descriptions 
and type specimens. 
A TABLE OF FAMILIES OF 
THE ICHNEUMONIDEA (PARASITICA). 
Abdomen emitted from the metanotum.. EVANIIDAE. 
Abdomen emitted from the apex of meta- 
thorax. 
Front wings with discoidal nervures. 
Terebra rising from near apex of the 
usually deplanate abdomen. 
Front wings with two recurrent nervures ICHNEUMONIDAE. 
Front wings with one recurrent nervure BRACONIDAE. 
Terebra rising from near base of the 
usually compressed abdomen .. CYNIPIDAE. 
Front wings with no discoidal nervures. 
Prothorax not reaching base of wings; 
venter emitting terebra us .. CHALCIDIDAE. 
(9). 10. Prothorax reaching base of wings; anus 
emitting terebra = sie .. PROCTOTRYPIDAE. 
= —s SN —_o™N Fea te 
ON N 
Sem ——S a 
Oo oo ied 5 ee) = 
“— 
A TABLE OF SUB-FAMILIES OF THE ICHNEUMONIDAE. 
(4). 1. First segment basally contracted; areolet 
pentagonal. 
(3). 2. Mesosternum not sulcate; terebra con- 
cealed : fe ay .. ICHNEUMONINAE. 
(z). 3. Mesosternum sulcate ; terebra exserted CRYPTINAE. 
(1). 4. First segment not petiolate nor areolet 
pentagonal. 
(8). 5. Abdomen dorsally deplanate ; postpetiole 
broad. 
(7). 6. Metanotum rarely longitudinally costate ; 
terebra exserted PIMPLINAE. 
(6). 7. Metanotum usually longitudinally costate : 
terebra concealed By? TRYPHONINAE. 
(5). 8. Abdomen laterally compressed ; post- 
petiole linear : sf .. OPHIONINAE, 
