C O N T E N T S 



Pago. 



Prefaro 5 



lutroduetion y 



External structural characters: The head; the thorax; the .ihdomen, ovi- 

 positor, etc 10 



Habits of tlie perfect iiisiicts Ki 



Diiiiorphisiu ami pa rtlicnogciu'sis 17 



The transforiiiatiojis or life history IK 



The egy and eiubryological (hivelopiiieiit; tke larva-, tlieir habits and 

 jinpation. 



Distribution 21 



Classilicutiou 22 



Table of the snlifainilies gfi 



Subfamily I.— Hethylina' 27 



II.— Euiboh niiuie 77 



III.— Dryiiiina' 80 



IV. — Ceraphroniua' 102 



V, — Seelioiiinie 13(5 



VI. — riatygasteriuie 247 



VII.— Heloriua' 330 



VIII.— Proctotrypiiiie 331 



IX.— Bely tiiiie 345 



X. — Diapriinai 3H4 



Tabular view of the bred NortU American Proctotrypidie 449 



Literature .ind al»l)reviations.. 453 



Explanation to i»late.s 459 



I»'l«x 4(}5 



