AMMOPHILA AND HER CATERPILLARS. 15 



of No. 15. It does not move spontaneously but when it is touched the 

 legs, particularly the anterior ones, quiver like those of a spider that 

 has been stung. 



July 24. When touched, moves at anterior end. 



July 25, 9 A. M. The caterpillar is dead and some of the segments 

 have turned yellow. 



No. 25. July 25, P. M. Took three caterpillars. Two of these were 

 from a nest. Of these the first had the ^^^ (6 mm. long) attached on 

 the right side of the sixth segment. The second one, we saw stung 

 this morning. Seven stings were given in the first seven segments, 

 with some malaxation. The third caterpillar is one which we offered 

 to the wasp and which received one sting, in the third segment, fol- 

 lowed by severe malaxation. All three are quiet but move when 

 stimulated. 



July 26, 9 A. M. Egg not yet hatched. The third caterpillar is alive. 

 The posterior end, beyond fifth segment, moves witiiout stimulation, 

 stretching out and upward. The posterior legs cling to the finger 

 tightly enough to support the weight of its body when it is lifted. The 

 paralysis is general but is much lighter toward the posterior end. 



July 27, 7:30 A. M. The third caterpillar is still lively but is not so 

 plump. The posterior legs cling to the finger and support the body, 

 the anterior end hanging down. These legs also make efforts to walk. 

 So far as the ^^^ is concerned this caterpillar wovild serve as well as 

 those found in the nest. It has passed faeces twice. 



July 27, 8 A. M. The ^^^ has hatched and chlorophyll is visible in 

 the lai^a. 



July 28, 8 A. M. Larva growing fast. It is all green in color except 

 the mouth, resembling the caterpillar that it is eating. This cater- 

 pillar is dead as is also the second one, which has begun to turn yel- 

 low at the anal segments. The third caterpillar is much shrunken but 

 is still alive, at least in the posterior half. 



July 30, 8 A. M. The larva has begun to eat the second caterpillar. 

 The third caterpillar is dead. 



August 1, 9:30 A. M. The larva has spun its cocoon which is 15 mm. 

 long, and light yellow in color. 



No. 56. August 17. We saw an Ammophila taking a caterpillar into 

 her nest at eleven in the morning. At five in the afternoon we took it 

 out. The egg was placed on one side of the sixth segment, near the 

 dorsum. The caterpillar is very imperfectly paralyzed, all its posterior 

 segments and the posterior feet wriggling violently when it is touched. 

 This is the most active caterpillar that we have seen so far, and the 

 egg must be tightly fastened on or it would be lost. The wasp appears 

 to have stung only as far back as the fifth or sixth segment, the sec- 



