56 NEW YORK STATE MUSEUM 



tree. The method of work is shown on plate 5. figure i, which rep- 

 resents the broad galleries of the larva and the exit hole of the 

 beetle. Our observations are confirmed by Professor Webster, who 

 also states that the pupal cell is made at about the level of the 

 ground and is cut diagonally across the grain of the wood and at an 

 angle of about 45- to the channel the lar\-a makes when ascending to 

 this level. 



Food plants. Linden is the greatest sufferer from the ravages 

 of this insect, though it has been recorded by Dr Packard as 

 infesting poplar, as occurring on ? elm by Riley and Howard, 

 and Rev. J. L. Zabriskie has taken the insect from appletrees. 

 It is doubtful, in our judgment, if the insect breeds in other than 

 the various lindens. 



Description [pi. 5, fig. 5]. Black, covered by a dense olivace- 

 ous pubescence, usualty with three denuded spots on each elytron, 

 two placed obliquely above the middle and one below. One or 

 all of these spots may occasionally be wanting. 



Distribution. This insect has been recorded from localities as 

 follows: Lake Michigan [Say] ; rare in ^Massachusetts [Harris] ; 

 very abundant in Lancaster county,. Pa. [Rath von] ; ^liddle and 

 Western states [LeConte] ; Amherstburg Ont. [E. B. Reed] ; 

 Buffalo [Zesch-Reinecke] ; L' Original and Grenville Can. [Har- 

 rington] ; rather common in Xew Jersey [Smith] : not rare on 

 linden in southwestern Pennsylvania [Hamilton] ; very common 

 [Provancher] ; Canada, Vermont, Xew Hampshire, Massachu- 

 setts, New York, Pennsylvania, Michigan, Wisconsin, Iowa, 

 Illinois, Ohio, Xew Jersey [Leng-Hamilton]. \A'e have also seen 

 specimens from ^lissouri. 



Natural enemies. Two enemies have been bred from this 

 species,. one, Bracon pectinator Say? from the insect in 

 ? elm and another, B. c h a r u s Riley, which is given by Dr 

 Packard on the authority of Riley's unpublished notes, and, as 

 no food plant is given, it is possible that the latter is but a 

 different name for the insect previously mentioned. 



Remedies. It is manifestly impossible to attempt to control this 

 insect on other than valuable trees, and in such situations, digging 



