26 
thousands of the beetles were distributed in California and in 
some localities kept the black scale in check. Away from the 
moist coast regions, however, they proved to be less effective.” 
“A similar lepidopterous insect, Thalpochares cocciphaga 
Meyrick, was brought over from Australia in the summer of 
1892 by Koebele and left by him at Haywards, Calif., but the 
species evidently died out.” 
THE HAWAIIAN Work. 
“In 1893 Koebele resigned from the service of the State 
of California and entered the employment of the then newly 
established Hawaiian Republic, for the purpose of traveling 
in different countries and collecting beneficial insects to be 
introduced into Hawaii for the purpose of destroying injurious 
insects. Before leaving California he had introduced a very 
capable ladybird, Cryptolaemus montrousieri Muls., which 
feeds upon mealy bugs of the genus Pseudococcus. ‘This insect 
flourished, especially in Southern California, and on arrival 
in Hawaii he found that coffee plants and certain other trees 
were on the point of being totally destroyed by the allied scale 
insect known as Pulvinaria psidi Mask. He at once intro- 
duced this same Cryptolaemus, which is an Australian insect, 
with the result that the Pulvinaria was speedily reduced to a 
condition of harmlessness. 
It may be incidentally stated that within the past year 
efforts have been made by the Bureau of Entomology to send 
the Crvptolaemus to Malaga, Spain, for the purpose of feed- 
ing upon a Dactylopius. The first attempt was unsuccessful, 
and the results of the last attempt have not yet been learned. 
Another importation of Koebele’s into Hawaii was the lady- 
bird Coelophora inaequalis from Ceylon, Australia, and China, 
which was successful in destroying plant lice upon sugar cane 
and other crops. Writing in 1896, Mr. R. C. L. Perkins stated 
that Koebele had already introduced eight other species which 
had become naturalized and were reported as doing good work 
against certain scale insects. Among other things he intro- 
duced Chalcis obscurata Walk. from China and Japan, which 
multiplied enormously at the expense of an injurious lepidop- 
