Bui. 243, U. S. Dept. of Agriculture. 



Plate IV. 





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Br 5 



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Fig. 1.— Blighted yellow-pine cones adhering to limb. This shows the position in which the 

 majority of the yellow-pine cones are found. Near the terminal are shown three 1913-14 

 cones, two of them killed by the cone beetle. Farther back on the limb are the cones killed 

 in 1912. Fig. 2. — A whorl of four yellow-pine cones, three <u' them killed by the cone bi 

 The upper cone is normal. This shows the comparative sizeof the blighted and normal 

 Fig. 3. — A yellow-pine cone opened to show condition of developing brood of the co 

 beetle. This brood, on June 20. r.o I, consisted of both larva? and pupae. (Slightly enlarged.) 

 Fig. 4. — o, Blighted cone as it appears in overwintering condition; b, blighted cone opened to 

 show damaged - Is and position of overwintering adults; &', overwintering adults. (Original.) 



Work of Cone Beetles in Cones of Yellow Pine. 



