476 Trans. Acad. Sci. of St. Louis 
EXPLANATION OF PLATE 
Pirate XXVI 
Fig. 42. The naked larvae of Monobia quadridens. 
Fig. 43. The way Chlorion auripes plugs her nest with grass. 
Fig. 44. The nests (A, B, C) of oo beesde ges in elder stems, (D) 
the grass plug in burrow o bee. 
Fig. 45. Chlorion auripes and its prey, Oecanthus latipennis. 
Fig. 46. Diphlebus bipartior (two and one-half times natural size). 
