478 
Fig. 47. 
Fig. 48. 
Fig. 49. 
Fig. 50. 
Fig. 52. 
Trans. Acad. Sci. of St. Louis 
EXPLANATION OF PLATE 
Piate XXVII 
The nest of Diphlebus bipartior (one-third natural size). 
Silaon niger (two times natural size). 
Cocoons of Silaon niger in a twig formerly used by Hypo- 
crabro etre icola. 
The tunnel of Hypocrabro stirpicola Renaiigh id P) the fine 
pith for partitions and the big rough b wig (F) for filling the 
empty gallery. (C) is one of the cocoon 
The nest of Odynerus lencomelos (natural size). 
