486 
Trans. Acad. Sci. of St. Louis 
EXPLANATION OF PLATE 
Prate XXXI 
Fig. 60. The long pipes Tryporylon politum are first made and then 
Fig. 61. 
Fig. 62. 
Fig. 63. 
Fig. 64. 
partitioned into cells. 
A nest of T. politum two tiers deep. 
A nest of T. politum built on the mat of roots. 
A portion of a t of T. politum broken off to show the 
thimble-shaped eat of Pseudagenia mellipes 
The cocoons of T. politum re-used by Osmia cordata. (A) 
shows the waxy patch work on top of damaged cocoon, (B) 
the wax plug with Tt te nk by the emerging “Dandie, and 
(C) the waxy portio 
