lO CONNECTICUT EXPERIMENT STATION BULLETIN I55. 



wet, the fungus developed and killed a great many beetles. 

 Beetles attacked by this fungus are covered with white mold, 

 as shown in Fig. 5. 



Predatory bugs of at least three species of the genus Podisus 

 feed upon the larvae and pupae, and Riley* records three 

 species of beetles that also devour full-grown larvae and pupae. 

 The praying mantis {Stagmo mantis Carolina Linn.) is also an 

 enemy of the elm leaf beetle in the southern portion of its 

 range. 



Fig. S.— Pupae and adults killed by fungus. Healthy specimens at 

 the left, natural size. 



REMEDIES. 



Spraying with poison. Covering the foliage with some 

 arsenical poison is the only sure means of preventing injury to 

 the trees, and for this purpose arsenate of lead is unquestionably 

 the most satisfactory of these poisons. It remains better in 

 suspension and adheres to the foliage longer than Paris green 

 or London purple, and is less liable to injure it. As there, are 

 now several brands of good arsenate of lead on the market, it 



* Div. of Entomology, U. S.' Dept. of Agriculture, Bulletins No. 6, p. 

 10 and No. 10, p. 13. 



