12 FARMERS’ BULLETIN 650. 
and almost identical in appearance with the Asiatic ladybird* (fig. 9), 
which was introduced into this country from China through the 
activities of Mr. C. L. Marlatt, of the Bureau of Entomology, in the 
hope that its introduction would result in the control of this insect. 
The Asiatic ladybird, however, unfortunately proved to be subject 
to certain native parasites, while the necessity of spraying for the 
scale destroyed its food supply to such an extent that it was unable 
to maintain its existence. 
Fic. 9.—The Asiatic ladybird, almost identical with the twice-stabbed ladybird, predatory on the San 
Jose scale: a, Second-stage larva; b, cast skin of same; c, full-grown larva; d, method of pupation, the 
pupa being retained in the split larval skin; e, newly emerged adult not yet colored; f, fully colored 
and perfect adult. All enlarged to the same scale. (From Marlatt.) 
In addition to the enemies just mentioned, there are certain very 
minute, four-winged flies (see fig. 10) belonging to the parasitic 
Hymenoptera, which are true parasites of scale insects. These place 
their eggs beneath the scales, some species attacking the scale insect 
while others attack the eggs. The resulting grubs kill the insect or 
devour the eggs. When the parasite has become fully developed it 
escapes through a small, round hole which it gnaws through the 
scale. Parasitism of the San Jose scale by these insects can be 
determined by inclosing in a glass vial a badly infested twig, for 
in the course of a few days the minute flies, if present, will begin to 
emerge. Dr. L.O. Howard and Mr. R. A. Cushman have prepared the 
1Chilocorus similis Rossi, 
