88 



extend to him a vote of thanks. He then made a motion to that 

 effect. Mr. Webster, continuing, stated that it would have been 

 exceedingly interesting if Mr. Marlatt could have gone to Korea, 

 but doubtless this was not possible. The main object, however, was 

 accomplished. He wondered if Mr. Marlatt would not have had as 

 good success with material gathered from Europe instead of Japan 

 and China. He did not consider that there was quite so much danger 

 fi-om our native predaceous insects as Mr. Marlatt had suggested, and 

 called attention to the value of the twice-stabbed ladybird in clearing 

 maple trees badly infested with the common maple Pulvinaria. The 

 occurrence of Chilocorus similis in Europe would indicate that it had 

 a variety of host insects, and that it would feed on almost any species 

 of scale. The insect, however, seemed to have acquired a greater 

 taste for the San Jose scale than any other of the scale insects, and 

 he thought that it would gain about the same status of importance 

 and abundance as other native species, but that it would probably be 

 a little more fond of Aspidiotus and Diaspis species than is G. Imnd- 

 nerus. Mr. Webster was very glad that the studies in Japan and 

 China had been made, and thought American entomologists had a 

 great deal to thank Mr. Marlatt for. 



Mr. Scott rose to second the motion made by Mr. Webster. He 

 considered this one of the most important attempts in experimental 

 entomology, and thought Mr. Marlatt was to be congratulated as con- 

 tributing such valuable work along this line. 



The president then put the motion, and it was heartily carried. 



Mr. Smith stated that Mr. Marlatt's paper had interested him 

 greatly, and he considered that the most important feature of the 

 work was that Mr. Marlatt had shown that China was the native home 

 of the San Jose scale, and that it was there kept in check by native 

 insects. The question had always been, however, whether the enemy 

 which kept it in check in its home would do the same in the eastern 

 United States. He felt satisfied from investigation in California that 

 our native species was there one of the most active enemies of the San 

 Jose scale. He had found there, quite early in the season, that not 

 only had there been a brood of the ladybird larvae before the scale 

 began to breed, but that eggs were already scattered over the trees 

 for a second brood. He had seen larvae as well as adults feeding on 

 the dormant scale. He felt quite certain that this was the insect doing 

 most good in keeping the scale in check in that State. Just why the 

 beetle would not breed with us in the East as continuously he was at 

 a loss to explain. He had watched it for several yeare, and was con- 

 A'inced that it did not have more than two broods a year in New Jersey. 

 He stated that the beetles were eating on his trees at present, but not 

 at the same rate as in California. He had found them on trees that 

 had never been treated as well as on those which had been treated. 



