ORDER THYSANURA 



53 



slender, bristle-like, the Ixxly usually densely covered with 

 overlapping scales. 



Fig. 20. — Lepidocyrtus purpureus (Lubbock): 1, dorsal view of insect; 

 2, spring; 3, side view of dens showing serrations and barbed hairs; 4, 

 foot; 5, side view of mucro; 6, larval form; 7, eyespot of larval form 

 (From Ohio Naturalist. After Mrs. Alma D. Jackson.) 



The common bristle tail of dwellings, Lepisma doinestica, 

 is about one-half inch long, of a light silvery color, with 

 some darker bands on the back. They run ' with great 

 rapidity and are very smooth and flexible, so that they are 



