THE FALL WEB WORM. 57 



most of which belong to the family Chalcididce, with the exception of 

 three species of the Ichneumonid genus Hemiteles. So extensive baa 

 been this killing off of the primary parasites by the secondary, that 

 were not the fates of the three classes, viz, the plant-feeder, the pri- 

 mary and the secondary parasites so interwoven, the destruction of 

 these beneficial insects might be considered a serious matter in dealing 

 with the plant-feeder. 



We have not taken time to determine these secondary parasites spe- 

 cifically, but give a little table showing the number of species concerned, 

 mentioning them only by their genera: 



SECONDARY PARASITES. 

 On Apanteles : 



1. He mi teles sp. 



2. Elasmus sp. 



3. Eupehnus sp. 



4. Panstenon sp. 



5. Cirrospilus sp. 



6. Pteromalus sp. 



7. Pteromalus sp. 

 On Meteorus hypliantriee . 



1. Hemiteles sp. (= 1 on Apanteles). 



2. Spiloclialcis sp. 



3. Hemiteles utilis Xort. 



4. Eupehnus sp. (= 3 on Apanteles) 



5. Hemiteles sp. 



6. Pteromalus sp. (= G on Apanteles). 



7. Pteromalus sp. (= 7 on Apanteles). 

 On Limneria pallipcs Prov.: 



1. Eupehnus sp. {= 3 on Apanteles). 



2. Tetrastichus sp. * 



3. Pteromalus sp. (= G on Apanteles). 



4. Pteromalus sp. (= 7 on Apanteles). 



5. Elasmus sp. (= 2 on Apanteles). 



The observations just recorded were made in the main during the 

 summer of 1S8G, a season of exceptional abundance of the worms. We 

 may add that, in accordance with our predictions in the first edition o( 

 this Bulletin, there was an immense decrease in the number of the worms 

 with the opening of the spring of 1SS7. So many had been taken off 

 by the fungus disease and by parasites that the result was that except 

 in a few streets the worms did not become abundant. Moreover, the 

 parking commission sent out carts and men as soon as the webs had 

 begun to be easily seen, and so thoroughly were the nests destroyed 

 that the second generation of worms attracted no attention whatsoever. 



