MISCELLANEOUS ANIMALS 



417 



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

 abdomen and legs black. 



The slave-maker ant, Formica difficilis, resembles the 

 above in size and appearance, but builds its nests almost 

 wholly underground, often beneath large flat stones. 



The slave ant, Forviica siibsericea, 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 bnumeus, 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, commonly known 



