370 AN ATTEMPT TO CONTROL INSECT PESTS 
Larval Parasites (Hymenoptera). 
Pteromalus egregius, Forst. 
Apanteles lacteicolor, Vier. Apparently well established. 
Meteorus versicolor, Wesm. 
Larval Parasites (Tachinidae). 
Zygobothria nidicola, Towns. Apparently firmly established. 
Compsilura concinnata, Meig. 
Tachina larvarum, F. 
Dexodes nigripes, Fall. Establishment hoped for. 
See under gipsy moth. 
Eudoromyia magnicornis, Lett. 
Pales pavida, Meig. Establishment doubtful. 
Parexorista cheloniae, Rond. J 
Pupal Parasites (Hymenoptera). 
Pimpla examinator, F. 
»  tstigator, F. See under gipsy moth. 
Monodontomerus aereus, Walk. 
Totals colonised— 
Hymenoptera ... “ies ac add 1,794,640 
Tachinidae - bela See Ae 68,343 
Calosoma a wie es ae 18,835 
1,881,818 
The authors thought in 1909 that they could foresee the end of their work 
in 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 future, and it is to be trusted that this publication will not damp their 
enthusiasm. 
