310 



PROCEEDINGS OF THE ACADEMY OF 



[Apr., 



will be described in detail and then the variations found in the other 

 above-enumerated individuals will be stated. 



(a) Winged Female of Formica. — The wings have dorsal and ventral 

 surfaces, and the legs may be divided for description into four sur- 

 faces. The inner surface faces the ant's body and the outer surface 

 is directed from the body. The anterior surface faces the head, 



Fig. 1 . — Diagram of ventral surface of female of Formica, showing location of 

 groups of pores. X. 7. 



Fig. 2. — Diagram of dorsal surface of female of Formira, showing location of 

 groups of pores. X 7. In figures 1 and 2 the wings are disarticulated and are 

 inserted at the right. X 15. 



while the posterior surface is directed backward. There are always 

 three groups of pores on the front wing, two on the hind wing, 

 three on the trochanter, and one on the femur of each leg. There 

 are also two groups of isolated pores on each trochanter and on each 

 tibia. The groups are located as follows: Nos. 1 to 5 inclusive lie 

 on the bases of the wings, Nos. 1 and 2 (text fig. 1) being on the 



