732 >'EW YORK STATE MUSEUM 



observed in the yicinity of the trees, and it was probably this 

 species which preyed on the baric beetles. This is a striking 



illustration of the value of woodpeck- 

 ers and their perseverance in digging- 

 out such small insects. These pupae 

 were undoubtedly the progeny of the 

 fall brood of beetles, which were ob- 

 served Sep.. 7, 1900, entering tribes in 

 large numbers. Aug. 1, 1901, adults of 

 S c o 1 3' t u s in some numbers were 

 entering the bark of a young dying 

 appletree, a victim of Sap e r d a 

 Candida, at Pittstown N. Y. The 

 bark beetles gnawed many minute 

 holes about ^-,r of an inch deep and of 

 the same diameter. Some of these 

 holes were deserted, and in other 

 places the beetles were at work mak- 



FiG. 7 Work of fruit tree bark • . i • , ... 



beetle in plum (original) lug the prmiary entrance or beginning 



a gallery. This observation in connection with the preced- 

 ing ones shows very clearly that the fall brood of beetles, 

 if there be a distinct one, as is very probable, extends 

 in the eastern part of New York state from Aug. 1 till Sep. 

 7 or later. This is still further confirmed by our finding at 

 Eipley N. Y. Sep. 5, 1901, beetles entering plumtrees in large 

 numbers. 



The presence of pupae and recent!}' transformed beetles in the 

 plumtrees examined May 22 would indicate that the adults 

 would probably have emerged within a short time. There are 

 therefore at least two generations annualh' in Xew York state, 

 and the short period necessaiy for the completion of the life 

 CA'cle permits more. It may be that more do occur, but there 

 does not appear to be any good evidence to that effect, at pres- 

 ent. Another cheering feature in the last mentioned attack 

 was the breeding of numbers of the beneficial parasite known as 

 Chiroi)achys colon Linn. 



