MISCELLANEOUS ANIMALS 



417 



in diameter. The head and thorax are dull red, and the 

 abdomen and legs black. 



The slave-maker ant, Formica difflcilis^ resembles the 

 above in size and appearance, but builds its nests almost 

 wholly underground, often beneath large flat stones. 



The slave ant, Fonnica siibseiHcca^ is found in colonies 

 of its own under stones and commonly, also, as slaves in 

 the nests of the last-named species. 



Fig. 168. Elk killed by Grubs in the Head 

 (Photograph by Charles Irving Rice) 



The corn-louse ant, Lasiiis bjitjmens, is the brown ant, 

 about one-eighth of an inch in length, so common about 

 roads and pastures. Many, if not all, ants attend aphids, 

 in order to obtain the sweet secretion, commonlv known 



