320 THE AMERICAN NATURALIST. [Vol. XXXVII. 



Before ten o'clock, particularly if the mornings were damp or 

 cloudy, they were so plentiful that as many as thirty have been 

 captured within an hour. Toward noon as the sun neared the 

 zenith so that its rays reached the bottom of the gorge, I have 

 seldom found more than half a dozen specimens, and that too, 

 in the same place where, perhaps on the following morning they 

 have appeared as abundant as ever. This has happened so 

 often that it has led me to believe that those creatures do not 

 enjoy much heat and to escape it, either go farther from the sur- 

 face or seek stones in a more sheltered place. 



Machilis were generally found with the body, antennae and 



so that the 

 al an alert 



