228 MANUAL OF NATURAL HISTOBY. 



I. TRIBE. — Heterogynous-Hymenoptera (Heterogyna). 



Fore-wings not folded ; larvae social. 

 9. Family. — True-Ants (Formicidae). Antennae 

 elbowed ; eyes distinct ; thorax continuous, 

 more or less contracted in middle ; abdomen 

 without a sting, peduncle composed of a 

 single elevated scale. Males and females 

 with wings ; neuters wingless. Social and 

 gregarious. 

 10. Family. — Stinging-Ants (Myrmicidae). An- 

 tennae elbowed ; eyes distinct ; thorax con- 

 tinuous, more or less contracted in middle ; 

 abdomen armed with a sting, peduncle 2- 

 jointed ; males and females with wings; neu- 

 ters wingless. Social and gregarious. 



II. Family. — Blind-Ants (Poneridae). Antennae 



elbowed ; eyes of neuters obsolete ; thorax 

 continuous, moreor less contracted in middle; 

 abdomen armed with a sting, peduncle formed 

 of one large scale ; males and females with 

 wings ; neuters wingless. Social and grega- 

 rious. 

 12. Family. — Velvet- Ants (Mutillidae). Antennae 

 inserted in middle of face ; thorax continuous, 

 the segments soldered together ; ocelli want- 

 ing ; body clothed with hair; abdomen armed 

 with a sting, peduncle short, simple; legs 

 robust ; tibiae and tarsi spined and ciliated ; 

 females destitute of wings. Solitary. Males 

 and females, no neuters. 



