PLATE XII. 



FIG. 1. A thorough locality study by Sphex ichneumonea. 

 FIG. 2. A hasty locality study by Sphex ichneumonea. 



FIG. 3. Locality study of Astata bicolor. The wasp flew from nest to 1, 

 paused a moment, then flew back; then to 2, paused and flew 

 back; then to 3, paused, then to 4, paused and flew back to nest; 

 flew to 4, 5, 6, 7, 8 and 9, pausing at each spot, and flew back to 

 nest along 10; flew, successively, along 11, 12 and 13, resting at 

 the spots designated; from 13 she circled around nest in direc- 

 tion of arrow points and departed. 



FIG. 4. A second locality study of Astata unicolor. The continuous line 

 shows the course walked over by the wasp, the short marks at 

 right angles representing resting places; the broken line indi- 

 cates flight. Line 1 shows the first study, leading back to the 

 nest, and line 2 the second, ending in flight and departure. 



FIG. 5. Course followed by Pompilus fusci})ennis in finding her spider 

 and in retracing her steps to the nest. The nest being com- 

 pleted the wasp went skimming over the ground as indicated by 

 the line, until the spider, which had previously been stung and 

 placed upon a leaf, was found. She then dragged it some dis- 

 tance beyond the nest to the point 2, from which place she took 

 it to the nest. 

 The locality studies are all very much reduced. 



