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NEW YORK STATE MUSEUM 



Stalk borer 



Papaipema nitela Guen. 



A brownish, white-striped caterpillar about an inch long, bores commonly in 

 herbaceous stalks and occasionally in the tender twigs of certain trees. 



This stalk borer, well known because of its infesting thick herbaceous 

 stems, occasionally works in the younger twigs of maple and ash. 



Birch bark borer 



Dryococtcs species 

 A brownish, cylindric beetle, works in the stumps of recently cut yellow birch, causing 

 an excretion of sap which gums the rust-colored borings to the outside of the affected wood. 



This species was met with by the writer Aug. 23, 1900, at Axton N. Y., 

 where it was working under the bark of the stump of a recently cut 



f — -• .-^ yellow birch. It 



appeared to be 

 relatively scarce in 

 the Adirondacks in 

 1900, and was met 

 with but once, 

 though a number 

 of stumps were 

 examined in hopes 

 of finding it. It 



was taken by Mr Young, July 1903, in recently burned trees at Big Moose 

 and Saranac Inn, at which time it appeared to be common, probably 

 because of the large number of trees offering favorable conditions for its 

 development. The only exterior indication is 'oozing sap which causes the 

 rust-colored borings to adhere to the entrance of the gallery. The insect 

 works in a very irregular manner under the rough bark. There is usually 

 a central chamber from which several galleries of greater or less lengths 

 may diverge, in almost any direction, and sometimes there is a large exca- 

 vated area with apparently no plan. 



JOHTtU 



Fig. 117 Work of Dryoooetes sp. in birch, showing entrance and galleries (original) 



