18 IMPORTED PARASITES. 



« 



PARASITES OF THE GYPSY MOTH IN EUROPE. 



Table 2 is similar in construction and illustrates the para- 

 sitism of the gypsy moth in Europe. There are at least 22 

 species, and possibly one or two more of slight importance, 

 known to attack the moth in various European countries, and 

 of these, 15 are considered to be important. Of the 22, 2 are 

 identical in all respects with 2 which occur in Japan, and are 

 considered to be the same species. Six or 7 are quite distinctly 

 different from any which have yet been received from Japan, 

 and it is impossible to separate the remainder from the Japa- 

 nese species by habit and method of attack alone. The most 

 ■ of them, however, appear to be different in their final appear- 

 ance as adults, and are considered, for the present, as repre- 

 senting different species. 



There are several reasons why there should be a longer list 

 of European than of Japanese parasites, principal among which 

 is the greater variety of climate represented by the different 

 European countries. Some of the parasites are confined al- 

 most exclusively to the Mediterranean region, others to Russia 

 and eastern Europe generally, while others are more common 

 in the northern, central and western portions. It is almost cer- 

 tain that other parasites will be found in other parts of the Jap- 

 anese empire from which small quantities of parasite material 

 have been received, but it is very doubtful if any of importance 

 will be added to the .list from European sources. 



It will be noted, if the table is scrutinized, that exactly the 

 same conditions as regards the sequence of parasites obtain in 

 Europe as in Japan. As in the table first given, every stage 

 of the moth from the newly deposited egg to the pupa is open to 

 attack by one or more species 'of parasite, and the sequence is 

 perfect. 



