Bui. 416, U. S. Dept. of Agriculture, 



Plate VI. 



Tracings of Travel of Female Red Spiders. 



Fig. 1. — Mite traveled 143 inches in 21 minutes, or at a rate of 6.8 inches per minute. Fig. 2. — Mite 

 traveled 249.5 inches in 60 minutes, or at a rate of 4.16 inches per minute. Fig. 3. — Mite traveled 

 111.25 inches in 45 minutes, or at a rate of 2.48 inches per minute. Fig. 4. — Mite traveled 151 inches 

 in 40 minutes, or at a rate of 3.78 inches per minute. Fig. 5. — Mite traveled 106.5 inches in 30 min- 

 utes, or at a rate of 3.55 inches per minute. Fig. 6. — Mite traveled 87 inches in 30 minutes, or at a 

 rate of 2.9 inches per minute. Dotted lines indicate the direction toward the som'ce of illumination 

 at time of beginnuig of experiment. Short intersectuig lines indicate poiats of route where the 

 table top was revolved 180°. (Original.) 



