302 



Margaret Holliday, 



epinotum of tlie first abdominal segment, and the episternite and 

 the sternite liave fused. In the region of tlie sternite the orifice of 

 the scent gland is present (Fig. Ca and Fig. Da). 



Fig. c. 



Leptothorax emcrsoni Wheeler. 



a Queen ; b Ergatoid female ; c Trioculate works, type YlII a ; d Biocellate worker. 



type VIb; e Macroergate . type II; f Microergate, type I; g Ergatoid formes. 



baving sutures for fore wings only. 



The microgyne is like the queen but smaller. 



The ergatoid has all the parts of the thorax just as in the 

 queen with the exception of the wings. of which the sockets only 

 are present (Fig. Cb and Fig. Db). 



