MYELOPHILUS MINOR. 271 



ii. Clearance of the felling-areas, at the latest by the middle 

 of April ; removal from the wood of all valuable timber with 

 thick bark before the beetles emerge-. 



iii. Uprooting of stumps and broken trees. If for any reason 

 this is not practicable, they must at any rate be barked. 



iv. Pine woods injured by fire must be felled. 



v. All insect-eating mammals and birds must be protected, 

 especially those referred to under T. typographic, L. (page 244). 



e. Remedial Measures. 



i. Trap-trees should be felled from February till September 

 so as to keep up a supply of trees which are not too dry for the 

 beetles to breed in. Thick-barked trees injured by storm, 

 snow, caterpillars or fire should be selected ; some of them 

 should be barked in the middle of May and others at intervals 

 of 4 to 6 weeks, and the bark burned in pits. 



ii. All standing trees containing larvae or pupae should be 

 felled and barked and the bark burned. 



4. Myelophilus minor, Hart. 

 a. Description. 



Beetle 3*8 to 4 mm. long ; closely resembling the preceding 

 species in appearance, but with the bristle- 

 bearing tubercles continued on the second 

 interstice of the elytra up to its apex, 

 as on the other interstices. 



I). Life-history. 



Season for flight. April and May, about 

 8 to 10 days later than the preceding 

 species. 



Standing Scots pines are selected for 

 breeding, but as a rule the thickly barked 

 lower part of the stems is avoided, and the 

 upper portion where the bark is thinner 

 is chosen. The young brood requires for its development 

 somewhat fresher material than in the case of M. piniperda. 



