EXPERIMENT STATION REPORT. 585 



On this same day an examination was made of the infested 

 trees on which the insects had been placed July 8th and 25th. 

 On the tree receiving the insects July 8th about a dozen full 

 grown ]arv?e and pupae in groups of twos and threes were 

 observed on the underside of leaves in close proximity, so that 

 the insects were about to complete a generation after having been 

 on the tree forty days. A few beetles were also observed on the 

 trees on which they had been placed July 25th and doubtless there 

 were many more which escaped observation, as they are e isiiy 

 overlooked. Thus the insects up to this date had developed to 

 some extent at least and the effect of their feeding on the scales 

 could be seen in several spots. 



The material in the jars was again examined carefully August 

 30th, and this time the examination was rewarded by the findii>g 

 of eggs, very young larvae and the remains of the eggs from which 

 they had emerged. These, however, were not allowed to develop; 

 but preserved for future reference. Thus oviposition had taken 

 place and development started within a little over a month after 

 the beetles had been recei\'ed and placed in the jars. The eggs 

 were concealed, in the characteristic manner of this insect, under 

 old scales from which the scale insects had been removed and 

 probably devoured. All the eggs, however, had not been ob^ 

 served and September 26th, when the jars were again examined, 

 there were 10 beetles and 2 partly grown lai'vse in one jar and 7 

 beetles, and 2 partly grown larvae in the other in apparently good 

 condition. The beetles were taken to the infested trees and 

 placed on a scaly limb. At this time a few pupae and beetles were 

 observed on the trees on which the insects had previously been 

 placed and Pentilia misella were as abundant as ever. The Chilo- 

 corns larvae remained in an apparently healthy condition for sev- 

 eral days when they were killed and preserved for future reference 

 and thus the supply of Chilocorus at the laboratory was ex- 

 hausted. 



'How the insects upon the infested trees will pass the winter 

 and, if successful in that, whether they will develope further next 

 season can be determined only by future examination. 



THE CHINESE MANTIS, TENODERA SINENSIS, IN NEW JERSEY. 



The Chinese Mantis, Tenodcra sinensis, made its appearance 

 near Philadelphia in 1898, and since then has increased and be- 

 come established in that locality. During the early part of 1901 

 an effort was made to establish it in New Jersey, and, as told in 



