PLATE CXXVI. 



Forda formicaria. (Page 83.) 



Fig. 1. — Larger apterous female taken whilst feeding 

 at the roots of various grasses. 



Fig. 2. — A smaller and whitish variety, commonly 

 found intermixed with the former insects. 



Fig. 3. — Another variety, probably a later genera- 

 tion of the same species. 



Fig. 4. — Underside view of the head of fig. 1, show- 

 ing the articulation of the antenna and the rostrum. 



Fig. 5. — Stool of grass, Triticum repens, under which 

 there was a nest of Formica rubra. The roots pene- 

 trated this nest, and the Aphides were feeding on these, 

 as well as on the blades close to the soil, as drawn at a. 



