THE VESPID.E. 



231 



tiny stones, which it forms into a sort of clay. It then complc cs a 

 ceil and victuals it, and afterwards constructs a second and perhaps 

 a third and fourth. Very often six or ten are to be found. 

 The insect which occupies the cell nearest the opening becomes 

 hatched before any of the others, although this cell was made last 



A SPECIES OF 



Odyneriis. 



LARVA. OF THE 



Odyncncs. 



rUPA OF THE 



Odynenis. 



of all, so that the youngest ^z% batches before the others. This 

 is very wonderful, and by thus hatching sooner than the others 

 this youngest Odyncrns makes room for the free passage of the 

 insect in the second cell, and so on. The cells open through one 

 passao-e • and if the insect in the most distant cell, and which 

 was filled first of all, was hatched first, it would force its way 

 through the other chambers to gain the open air, to the great 

 detriment of the included larvae. 



Ertmenes pomiformis is a black insect with yellow rings, Avhich 

 builds nests upon walls, and it does not hollow out the earth, but 

 constructs little round capsules out of clay, sticking them to bricks 

 and stones, and making one cell in each. In the engraving on 

 page 232 these little nests are shown, and the mature insects are 

 represented upon the wall. 



HYMENOPTERA AVHICH MAKE THEIR NESTS OF 

 PAPYRACEOUS SUBSTANCES. 



{VcspidiV.) 



The Hymcnoptcra which make their nests with papery-looking 

 substances are the Wasps, the true social wasps, and not the 

 solitary wasps which belong to the genera we have just described. 

 These true wasps are arranged in one large family, the VcspidiU, 

 which is subdivided into three groups, containing several genera. 



