THE EUMENIDAE 333 



The first cell that this one had made, the one nearest the 

 orifice, contained a half-grown larva and four greenish-blue 

 caterpillars, all of one species of Gelechiidae [S. B. 

 Fracker], (the larva was too immature to determine the 

 species). The next cell contained six specimens of the same 

 Lepidopterous larva, and hanging by a tiny thread from 



FIG. 65. The nest of Odyncrus pcdestris, in a clay bank. Natural size. 



the wall was the egg. The small, petiole-like gallery that 

 led from the main gallery to this was tightly packed with 

 soil, and the continuation of the main channel in a parallel 

 direction led us to think that a third cell was about to be 

 hollowed out of the end of this gallery. One has not far to 

 seek to suspect that the earth that is removed in the digging 

 of the new gallery and cell is used for the filling of the 

 short neck of the cell just provisioned. 



The fat larva which we captured in the first cell ate all it 

 could find, and also two caterpillars that we gave it from 

 the other cell. The next day, when we introduced a large 



