168 
PARASITES OF GIPSY AND BROWN-TAIL MOTHS. 
Accordingly, in order that at least a rough idea of the quantity of 
material handled at the laboratory may be had, Table VII, which, 
without being absolutely accurate, is very approximately so, has 
been prepared by Mr. R. Wooldridge, an assistant at the laboratory. 
Table VII. — Table showing number of boxes received at the laboratonj since beginning 
of work. 
1905 
1906 
1907 
1908 
1909 
1910 
Porthetria dispar egg masses boxes. . 
Porthetria dispar larvae and puprc do 
Euproctis chrysorrhoea egg masses do 
Euproctis chrvsorrhoea webs webs. . 
Euproctis chrysorrhoea Larv;r and pupae boxes. . 
Apanteles fulvipes and Apanteles lacteicolor. .do 
131 
1 
923 
46 
117,259 
313 
1 
1,539 
87 
55,082 
1,159 
18 
307 
17 
32,830 
160 
13 
32 
8,391 
1 
29,295 
1,167 
21 
1 
5,956 

29,696 
381 
63 
LOCALITIES FROM WHICH THE PARASITE MATERIAL HAS BEEN 
RECEIVED. 
Mr. Wooldridge has also prepared the accompanying map (fig. 1 1) 
showing the various localities from which parasite material has been 
received each year from 1905 to 1910, inclusive. It will indicate 
the thoroughness with which the more accessible parts of the world 
have been searched for parasites of these pests. 
THE EGG PARASITES OF THE GIPSY MOTH. 
Anastatus bifasciatus Fonsc. 
The first individuals of this species (fig. 12, female) were reared 
at the laboratory in the spring of 1908 from eggs imported the pre- 
vious winter from Europe and Japan. The dissimilar sexes were not 
immediately recognized as of the same species, and for a few days 
there was some doubt as to whether one, two, or four were represented 
among the few scattering specimens emerging. The number was 
soon reduced to two through the obvious attraction between the 
sexes, and soon after to the one, when the senior author had an 
opportunity to examine and compare series from European and 
Japanese sources. 
Their issuance had been anticipated a long time before, and a 
quantity of gipsy-moth eggs had been collected in the summer, 
before embryonic development had progressed beyond its initial 
stages, and placed in cold storage. It was thought possible that 
some species of parasite might be reared from imported eggs during 
the fall or winter which habitually and necessarily oviposited in unde- 
veloped eggs, and il was hoped thai those collected in the summer 
might be kept fresh enough to serve as host material for laboratory 
reproduction. 
