THE PINE BEETLE. ig 



dust is forced out by the larvae a,nd lies around the trees. Pupation 

 takes place in the spring- of the third year, the perfect beetle emerging 

 about June. 



PREVENTIVE AND REMEDIAL MEASURES. 



In nurseries where the beetles are suspected at all, the saplings 

 should be smeared over to a height of about five feet from the ground 

 with a mixture of clay, paraffin, and soft soap, made into a thick paint. 



All saplings that are attacked should be felled and removed before 

 the beetles emerge. 



THE SMALL POPLAR LONGIGORN. 



Saperda populnea, Linn. 



Specimens sent in of Poplars attacked by a beetle larvae were 

 found to contain the pupae of this beetle. Unlike S. carcharias, the 

 larva makes a circular gallery, which gives rise to a gall-like swelling 

 (Fig 4). Later, the larva forms short vertical galleries. 



EXPLANATION OF PLATE II. 



Fig. i. The Large Poplar Longicorn Beetle. 



Fig. 2. Larva of the same. 



Fig. 3. Burrows made by the Larva in the stem of a young poplar. 



a. Plug of boring dust. 

 Fig. 4. Burrows of the Small Poplar Longicorn Beetle, in an aspen 



twig, showing two flight holes. 

 Fig. 5. View of the interior with the larval burrows exposed. 



THE PINE BEETLE. 



Myelophilus pmiperda, Linn. 



Five cases have been reported upon during the past year where 

 much mischief had been done by the larvae and beetles of this insect. 



LIFE-HISTORY. 



The female deposits her eggs, which number 100 or more, on 

 standing timber, selecting the lower portions of the stem, also on 

 dying or felled timber, or on tree stumps. There is no breeding 

 chamber made as in the case of some allied genera, the eggs being 

 laid in small tunnels in the bark. The larvae hatch out in from four- 

 teen to twenty-one days, and at once commence to eat their way beneath 

 the bark, forming a series of smaller tunnels at almost right angles 

 to the main tunnel. At the end of these tunnels the small, legless 



