18 



the scale. On June 18 of the present year an additional lot of speci- 

 mens upon maple leaves was received from Prof. Hunter Nicholson, 

 of Knoxville, Tenn., and with them rmmbers of the larvsB of the 

 Hyperaspis feeding energetically upon the eggs of the scale insect. 

 Drawings were made of this very peculiar and characteristic larva 

 which are reproduced herewith. The striking likeness of the larvje 

 of the Hyperaspis tt> a mealj' bug will at once be noticed. Were it 

 feeding upon mealy bugs instead of upon Pulvinarias (and it fre- 

 quently does feed upon mealy biigs) it would at once be evident that 



Fig. 1. — Hypcruftpiii siyjialu: Lju'vlv feeding upon Pulvinaria on leaf of maple ab( >ve, natural size; below, 



enlarged (original). 



we have here a clear case of what Professor Poulton calls "'aggressive 

 mimicry." 



Mr. Gillette expressed the wish that the Association might have 

 more talks like Dr. Howard's, and asked if there were an}^ questions 

 or suggestions. 



Mr. Howard said he would be glad to hear from Mr. Lounsbury on 

 the subject of the parasite of the black scale. He .said he wished to 

 add that Mr. Lounsbury had sent two boxes — one a deep box and one 

 a shallow box. The shallow box carried the more successfully. The 

 scales had begun to rot in the deep box. 



Mr. Louusbur}" replied that he was more in quest of infoi-ination 

 than anxious to give it, and would like to know if anything had been 

 done about the secondar}' parasites. 



