480 Trans. Acad. Sci. of St. Louis 
EXPLANATION OF PLATE 
Puiate XXVIII 
Fig. 52. The burrows of veep zendaloides. (P) pith, (C) 
mud cocoon. (S) empty space 
Fig. 53. Trypoxylon clavatum. 
Fig. 54. The nest of Seeliphron carmentarium re-used by Trypoxylon 
oe (A) contains the cocoons and er (B) has them 
moved to show the well-made partiti 
