THE AMERICAX AATURALIST. [Vol. XXXVI I L 



Turning. — It consists in a long series of changes in position 

 from the right to the left : the female lies as if dead now on one 

 side and now on the other. After lying a few minutes upon the 

 right the female got back into the ventral position and in a min- 

 ute or so turned on to the left side, remained there a few minutes 

 and then went back to the ventral position for a minute or two, 

 then to the right side and so on. The striking features in this 

 set of habits are the inert state assumed while lying upon the 

 sides and the great regularity and persistence of the alternating 

 rhythm. The following example will show the details of this 

 process as observed in female XXXII, April 1 5, 1903, from 1.35- 



5.50 p. m. As shown in the table this female, as soon as the 

 supine egg-laying position was given up, remained upon her 

 ventral side for three minutes, as in Fig. 6, then turned and 

 lay upon the right side for two minutes, then upon the left side 

 for six minutes, then upon the ventral side for one minute, upon 

 the right side for three minutes and so on. 

 V3, R2, Vo, L6, Vi, R3, Vi, L4, V2, R2J, V^, L4 

 Vi, R4. ViiL4i,Vi R3, Vi L4, Vi, R2, V3, L6 

 V2, R3, Vi, L4, VU, R3i Vi, L6, Vi^ R3, V2, L4 

 Vi, R6, Vo?, L5, Viix,_' _ L3, Vo, R4, ViL6i 

 V3/ R4i V4, L4, Vi, R4iVi, L6*, V2i, R5, Vi, L6J 

 Vij, Vi, L6iVi, R/i, Vi, L5, V2, R7, Lsi 



V2, R8, Vi, LsiVi, R/'^Vi, L4i, V3, RS^, V ^ 



