184 INJURIOUS INSECTS OF 1904. 



For a number of years, so I am told by Prof. Green of the Horti- 

 cultural Department, the above insect has been at work in the 

 "forest" at the Experiment Station, and has caused the death of 

 several Scotch Pines, Pinus sylvcstris, though the horticulturist 

 reports using 50 per cent kero-water with success. They were 

 later found in large numbers on the Jack Pine, Pinus divaricata. 

 At Prof. Green's request this department undertook to free the 

 Scotch Pines from its attacks, and on July nth these trees were 

 sprayed with kerosene emulsion, one part emulsion to eight of 

 water. On August 3rd they were sprayed again with the same 

 strength, and the Jack Pines treated in the same way, this being 

 the first treatment for the Jack Pines. Subsequent examination 

 showed a marked decrease in the scales on the Scotch Pines, which 

 received two treatments. In view of the presence of an immense 

 number of larvae and imagoes of the Coccinellid, Hyperaspis, which 

 were feeding upon the scale, and which, naturally, suffered by the 

 treatment meted the scale, we stopped further spraying. The white 

 larvae of the "lady bird," Hyperaspis, are shown in the accompany- 

 ing cut among the scales. 



THE STRIPED POPLAR BORER, MELASOMA SCRIPTA, 

 FAB., AN ENEMY TO WINDBREAKS. 



Fig. 166.^ — Poplar Borer, enlarged and natural size. A. G. Ruggles. 



The above excellent illustration shows this beetle much enlarged 

 and natural size. Complaint of its attacking poplars reached us 



