STATE GEOLOGIST. 123 



six spines, each of which gives out a fine seta. Inferior antennae short compared 

 with the size of the insect. Anterior branch has five long filaments, three from 

 the terminal, and one from each of the other joints. The posterior branch has 

 short spines on the two basal joints. Eye large. Abdomen very wide and 

 densely ciHated. This is the largest member of the family, its motion is a suc- 

 cession of bounds. This animal is heavy and slothful compared to other species. 



