370 AN ATTEMPT TO CONTROL INSECT PESTS 



Larval Parasites (Hymenoptera). 



Fteromalus ecjregius, Forst. | 



Apanteles lacteicolor, Vier. \ Apparently well established. 



Meteorus versicolor, Wesm. ) 



Larval Parasites (Tachinidae). 



Zyijohothria nidicola, Towns. Apparently firmly establislieil. 



Compsilura concinnata, Meiff. ) a i ■ 



rn 1 ■ 1 TT. / oee under a'liJsy moth. 



laetnna larvarum, r. ^ ai j 



Dexodes nigripes, Fall. Establishment hoped for. 



Endoroinyia niagiiicornis, Zett. "J 



Pules pucida, Meig. )■ Establishment donbti'iil. 



Pare.vorisla cheloniae, Rond. \ 



Pupal Parasites (Hymenoptera). 



Pinipla eMimiiiutor, F. 



„ instigator, F. ^ See under gipsy moth. 



Monodoiitomerus uereus. Walk. 



Totals eolonised — 



Hymenoptera ... ... ... ... 1,794,64U 



Tachinidae 68,343 



Calosoma ... ... ... ... 18,835 



1,881,818 



The authors thought in 1909 that they could foresee the end of their work 

 iu 1916. They consider that they failed in their importations to some extent in 

 1910, and that their establishments were not so promising ; but they hope to 

 make up for this in 1912, and still look to ultimate success in 1916. 



In commenting upon such an undertaking, one must remember how easy it is 

 to be wise after the event, and the very fact that the work done has been set 

 forth with the most elaborate detail, facilitates criticism. Indeed, the general 

 impression given is that the work has been over-elaborated, and if only the 

 unquestioned energy of all those concerned in the investigation had been 

 restricted severely to a few of the more important lines of enquiry, it seems 

 possible that more definite results might have been obtained. For whatever 

 the hopes for the future may be, it cannot be denied that success has not yet 

 been achieved. 



In fact, the undertaking might almost be regarded as a failure from the larger 

 point of view. Perkins, in Hawaii, has obtained better results with far less 

 effort, and at much less cost ; so have others, whose efforts are scarcely, if at 

 all, referred to in this bulletin, though it professes to give a summary of all such 

 experiments. Many entomologists see in this line of work the best promise 

 for the futhre, and it is to be trusted that this publication will not damp their 

 enthusiasm. 



