42 Journal New York Entomological Society. t VoL xxvn. 



as was the case with some found early in the summer of 1917, the 

 petioles either become shrivelled or decidedly swollen and cracked. 

 In these cases the eggs had evidently been deposited at the base of 

 the leaf blade. In 1917, on August 1, larvae were found in leaf 

 petioles, so that apparently only a few days previous to this had they 

 hatched from the eggs and it seems probable that larval development 

 begins in July. From this date on they may be found at various 

 times during the season. By the approach of cold weather in the 

 fall larval development is completed and the lava assumes a charac- 

 teristic position in a pupal chamber. These larval cells or pupal 

 chambers may be located either in the pith or woody portion of the 

 stem, but not at the surface and usually at an angle. They have 

 been found at the base of the stem, even slightly below the ground 

 surface, but never at the tips. 



In these burrows the larva hibernates with the body doubled over 

 on itself, the folding taking place between the third and fourth ab- 

 dominal segments, sometimes with the head pointing upward and 

 sometimes in the reverse position. This condition continues until 

 the following April or even early May, as pupse were found in stems 

 this year (1918) when examined on May 25. 



The pupal stage apparently is of about two weeks' duration. In- 

 fested stems examined on April 22 were found to contain larvae, and 

 from these adults emerged May 8. In emerging it is evident that 

 the beetles eat their way out from the pupal chamber. The adults 

 frequent the upper surface of the leaves of the food plant and in the 

 nursery at Rutherford, where most of the observations were made, 

 many were noted in that location at various times during the season, 

 both in copulation and feeding. They feed on the younger leaves, 

 making holes from one sixteenth to one eighth of an inch in diame- 

 ter. These holes apparently become intensified as the leaves enlarge, 

 and on a badly infested plant many leaves may be injured in this way. 

 The attitude of the beetles varies with weather conditions. When 

 the sky is overcast they may be readily picked from the leaves, but 

 on a bright day when capture is attempted, they release their hold 

 and drop, usually catching on one of the lower leaves or spreading 

 their wings in attempted flight. 



The descriptions of the various stages are as follows : 



Egg. — Not observed. 



