REPORT OF THE STATE ENTOMOLOGIST I912 



IO3 



far as adjacent trees are concerned, are those which show little 

 or no discoloration of the foliage and very few exit or " shot 

 holes," since these are the trees which contain the largest number 

 of destructive borers. Pines which died the preceding year or 

 earlier, while infested more or less by other borers, are not a 

 menace to living trees. Furthermore, if satisfactory results are to 

 be obtained by cutting out and destroying infested pines, it is es- 

 sential that there should be cooperation on the part of all, since 

 the bark borers fly readily for considerable distances. 



Platypus punctulatus Chap. Numbers of this Central 

 American borer were taken last August on Panama logs which had 

 been shipped around the Horn and were then in the lumber yard at 

 Astoria. The beetles were coming out in large numbers and attack- 

 ing freshly sawn sappy mahogany in the 

 yards, running longitudinal and, in some 

 instances, vertical galleries into the wood. 

 It was estimated that the injury in early 

 August was as high as $200 a day. An- 

 other Ambrosia beetle, namely, X y 1 e - 

 borus torquatus Eich., was also 

 taken in some numbers on the mahogany 

 logs. With the above were associated 

 species of A u 1 o n i u m b i d e n t a - 

 turn Fabr., X u t h i a b r e v i p e s 



and Palorus 



men n u s 



Sharp 



Herbst. The Scolytids were kindly iden- 

 tified by Doctor Hopkins through the 

 courtesy of Doctor Howard, while the 

 other Coleoptera were determined by 

 Doctor Schwarz, both of Washington. 



Pine bark aphid (Chermes p i 11 i - 

 cor tic is Fitch). Early in July 

 our attention was called to some eight 

 in the western end of Albany. These 



Fig. 13 Dorsal view of 

 Platypus punctu- 

 latus, x l]/} (original) 



or nine large pine trees 

 pines were very badly 

 infested by this bark louse, the upper portion of the trunk and 

 the under side of the larger limbs being nearly covered with the 

 white cottony excretion. One tree was dead, probably having suc- 

 cumbed to earlier attacks, while a second was in a dying condition. 

 An examination of the latter showed that various borers had begun 

 work under the thicker bark, and that in all probability the tree 

 would die before the end of the season. It is possible that these 

 trees, as in the case of park trees observed in earlier years, may 



