15 
m 
r^ 
^ 
c o 
Q 
A. C-thAlai . f »«v SaKunJd., 
come into Mr. Craw's hands. It is only quite lately that Mr. Craw 
came upon andromelas. Further, if Japan is the native country of the 
San Jose scale, it is to be expected that it has there various natural 
enemies which keep it in check ) it is not to be expected that it is found 
everywhere in quantities, any more than our native Diaspime are with 
us. Indeed, next time an economic entomologist goes to Japan he 
should make it his particular business to look up A. perniciosus, and see 
if there do not exist such natural enemies as are suggested, and whether, 
perhaps, one or more of them can be introduced into this country. It 
has been shown that Diaspidiotus enters the neotropical region, and 
this might be thought to favor the 
supposed Chilian origin of A. perni- 
ciosus. But even in the West Indies 
the type becomes largely modified 
as to the scale ( A . punicce, A. diffinis), 
and greater still is the divergence of 
tbe Chilian .4. latastei — all this not 
at all in the direction of perniciosus. 
While it is true that certain of our 
nearctic types do appear in a striking 
fashion in the southern parts of South 
America, I should be greatly sur- 
prised to receive from thence such a 
scale as A. perniciosus. 
Still less can the supposed Austra- 
lian origin be supported, as none of 
the native Australian species seem 
to belong to the same subgenus. 
Whether Mask ell's "Aonidia" fusca 
is introduced Asp. perniciosus, it is 
difficult to say, but it would seem 
probable from what he has written 
on the subject. I am quite con- 
vinced, however, that the supposed 
variety of perniciosus recorded by 
Maskell as on Eucalyptus in Australia is not that insect; the descrip- 
tion reads more like A. forbesi, but it is very likely something else. 
It would seem that our native U. S. species of Diaspidiotus are not 
so very nearly related to those of Europe. An examination of such 
European types as ostrea'formis (fig. 3), betulw (fig. 10), spurcatus (fig. 
10), etc., shows a group not to be well matched in this country, noticeable 
for its broad, low, median lobes. The difference, indeed, is not very 
great — not so great as between some of our own species— but yet it is 
sufficiently obvious. In our species the median lobes are narrower, and 
usually more inclined to be notched on the outer margin. Thus they 
seem nearer to the Japanese type of perniciosus, etc. 
Chit--. SM. 1,3. 
liotug betulce and A.spurcatut 
(original). 
