488 
Trans. Acad. Sci. of St. Louis 
EXPLANATION OF PLATE 
PLaTe XXXII 
Fig. 65. The nest of Tryporylon plesium. 
Fig. 66. 
Fig. 67. 
Fig. 68. 
ee ee nest alge Meaty cells of 0d ON ok a (B) A 
ith the nest of Trypozrylon plesium, showing manner 
in Peas mica is ee in position to facilitate study. 
A nest of Sceliphron caementarium decorated with balls of 
mud. 
The cocoons “ Ne Laat texense in an old nest of Sceli- 
phron caemen 
