252 INSECTS. 



I. Spiculifera (Dart-bearers). 



Ovipositor of dividing into separate bristles. 

 (Larvae parasitic in bodies of living insects.) 

 Family 1. Cynipidse. 



2. Evaniidas. 



3. Ichneumonidaa. 



4. Chalcididaa. 



5. Proctotrupidae. 



II. Tubulifera (Tube-bearers). 



Ovipositor sting-like, but without poison. 

 End of abdomen retractile, like a telescope. 

 (Larvae parasitic in nests of insects.) 



Family 2. Chrysididae (Ruby-tails). 

 SECTION II. ACULEATA (Stinging Insects). 



Abdomen of furnished with a venomous sting. 

 Hind-legs. The trochanter one-jointed. 

 Antenna twelve-jointed in > thirteen-jointed in $ 

 SUBSECTION I. -PRfEDONES (Predatory Insects). 



Hind-leg. Basal joint of tarsus not dilated. 

 I. Heterogyna (Different females), Ants. 



Fore-wings not folded. 

 * 9 with or without wings, and and $ with 



one or two nodes on base of abdomen. 

 (Habits social.) 



a. ] node. 

 Family 1. Formicidse. 



2. Poneridae. 



b. 2 nodes. 



3. Myrmecidse. 



* * $ without wings, and $ furnished with spikes 



at end of abdomen. 

 (Habits solitary.) 



4. Mutillidse. 



