Prothorax 



Node 



Abdomen 



Antenna 



Fig. i. — Side View of Formica rufa L., subsp. rubiginosa Emery. 



Fig. 2. — Details of Structure in Various Species. 

 a. Abdomen of worker of Ponera showing constriction between first and second 

 segments; b. Toothed spur on posterior tibia of Myrmica; c. Simple spur on posterior 

 tibia of Stenamma; d. Showing attachment of pedicel to dorsal surface of abdomen in 

 Cremastogaster lineolata Say; e. Abdomen and pedicel of Tapinoma sessile Say; /. Side 

 view of Pogonomyrmex occidentalis Cresson; note beard on the head; g. Circular anal 

 aperture of Lasius; h. Slit-like anal aperture of Iridomyrmex. 



