STRUCTURES OF SCOLYTID^B. 



577 



round, subconvex (Platypodinae). On the strength of these 

 differences the Platypodinae are often treated as a sep- 



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Fig. 132. Upper surface of Dendroctonus t'alciis Lee., showing names of various struc- 

 ture: 7 . (. \fttr Hopkins.) 



