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NEW YORK STATE MUSEUM 



bark of cedar, T h u j a occidentalis. He states that Mr Knaus con- 

 sidered this borer very destructive to junipers and arbor vitae in that State. 

 It was first noticed at Salina Kan., in the summer and fall of 1884, attack- 

 ing the junipers on the grounds of many residents of that city. The 

 beetles were present in great numbers and many trees were entirely 

 destroyed and others badly injured. The damage was almost invariably 

 confined to the base of the lateral offshoots of the branches, the beetles 

 burrowing under the bark and eating around the base of the twig causing 

 its destruction. This attack, as characterized by Mr Knaus, is different 

 from anything observed by the writer, unless the burrows passing around 

 the twig are the work of larvae rather than adults 



Description. The beetle varies in color from a light brown to black, is 

 a very little over inch long and relatively stout. The mouth parts 



apically and the eyes are black. The latter are 

 coarsely granulated, transversely elongated and 

 partly divided near their middle. The prothorax 

 is rather coarsely and thickly punctured and tapers 

 very much anteriorly. The wing covers or elytra 

 are margined anteriorly, deeply striate and thickly 

 clothed with short, yellowish hairs. Certain structural 

 details of the antennae are shown on plate 67, figure 

 7 and that of the middle and posterior tibiae in figure 90. 



A pupa nearly ready to assume the adult form is yellowish white, about 

 the length of the beetle and stouter. The eyes are brown and the mouth 

 parts almost black. Four of the abdominal segments project beyond the 

 wing pads. 



The typical burrow [fig. 91, 92, and pi. 63, fig. 4] has a very charac- 

 teristic form. There runs from the three lobed primary or nuptial chamber 

 nearly parallel with the wood fibers a broad burrow about ^ inch long. 

 Eggs are laid in minute notches on both sides of the parental channel and 

 the young work for a short distance at nearly right angles and then they 

 are apt to oblique in either direction. The larval burrows score the sap- 



Fig. 90 Middle tibiae : a=T o m i- 

 cus balsameus; b— P h 1 o e o- 

 sinus den tat us; c Posterior 

 tibia of latter (original) 



