More Hunting Wasps 



which actuate the feet and the powerful mus- 

 cular layer which is the creature's essential 

 motor organ. When examined merely 

 through the pocket-lens, this cylinder appears 

 to be slightly furrowed transversely, a proof 

 of its complex structure. Under the micro- 

 scope, it is seen to be formed by the close 

 juxtaposition, the welding, end to end, of 

 the ganglia, which can be distinguished one 

 from the other by a slight intermediate 

 groove. The bulkiest are the first, the 

 fourth and the tenth, or last; these are all 

 very nearly of equal size. The rest are 

 barely half or even a third as large as those 

 mentioned. 



The Interrupted Scolia experiences the 

 same hunting and surgical difficulties when 

 she attacks, in the crumbling, sandy soil, the 

 larvae of the Shaggy Anoxia or of the Morn- 

 ing Anoxia, according to the district; and 

 these difficulties, if they are to be overcome, 

 demand in the victim a concentrated nervous 

 system, like the Cetonia's. Such is my lo- 

 gical conviction before making my examina- 

 tion; such also is the result of direct observa- 

 tion. When subjected to the scalpel, the 

 larva of the Morning Anoxia shows me its 

 centres of innervation for the thorax and 

 the abdomen, gathered into a short cylinder, 

 96 



