160 LEAF-BEETLES. 



their work upon the fully expanded leaves, which were riddled in 

 every conceivable manner to such an extent as to destroy them en- 

 tirely. At least two generations did damage. The hibernating 



beetles commenced the work, and soon after their appearance 

 numerous eggs were found among the woolly substance of the 

 partly destroyed buds. The larva? soon hatched and continued 

 the work, and after passing- the pupal stage in a small earthen eel! 

 in the ground, a new generation of beetles appeared, which did 

 not disappear until the beginning of the warm weather in summer, 

 evidently to pass the rest of the warm season and the winter in or 

 near the ground. 



It is somewhat difficult to ascertain the number of broods in 

 this case, as some of the adults lived for ;i long time, and were 

 surrounded by other beetles, their own progeny. 



This species promises to become decidedly injurious, and 

 wherever it is found should be fought with arsenites as soon as 

 noticed. 



This is especially important, and most successful in the spring 

 when the culprits are still confining their attention to the buds. 

 A very strong arsenical mixture, one pound to fifty gallons of 

 water, with lime to prevent injury to the plant, has afforded good 

 protection. 



THE APPLE-TREK FLEA-BEETLE. 



( Haltica foUacea Lee. ). 



This is another little flea-beetle about the size of H. chalybea, 

 but slightly more elongated, and of a highly polished brassy-green 

 color. The feelers are dull brownish-black beyond the three 

 basal joints, which are obscured by short fine hairs ; the feet are 

 also dull brownish and pubescent. 



This beetle is not common in Minnesota, having been found 

 only in the southwestern part of the state, wdiere it occurred 

 rather abundantly feeding upon the evening primrose, the leaves 

 of which were entirely riddled by it. It was found also upon 

 similar plants growing near the shores of White Bear Lake, and 

 Lake Minnetonka, as well as in lirookings, South Dakota, thus 



