268 CONNECTICUT EXPERIMENT STATION REPORT, IQOI. 



believing it to be a new species, described it as S. carya* 

 Later it was found to be identical with Say's quadrispinosus. 



Fig. <?. Hickory twig, showing where the' beetles have made tunnels 

 in the axils of the compound leaves. Drazving made from an original 

 photograph. 



The following account of the method of attack is copied from 

 Dr. Riley's report: 



"Boring through the bark, the insect forms a vertical chamber next 

 to the wood, from half an inch to an inch in length, on each side of 

 which it deposits its eggs, varying in number from twenty to forty or 

 fifty in all. The larvae, when hatched, feed on the inner bark, each 

 one following a separate track, which is marked distinctly on the wood. 

 Some trees contain them in such numbers that the bark is almost 

 entirely separated from the wood. In many cases the upper part of the 

 tree is killed a year or two before the lower part is attacked. . . . Both 

 sexes bore into the tree the male for food, and the female mostly for 

 the purpose of laying her eggs. In thus entering the tree, they bore 

 slantingly and upward, and do not confine themselves to the trunk, 



* Fifth Annual Report, State Entomologist of Missouri, p. 103, 1873. 



