190 ENTOMOLOGICAL SOCIETY 
tions to the list of cosmopolitan species. The Archippus butter- 
fly (Danais archippus}, an undoubted endemic American spe- 
cies, though probably not a native of the North American fauna ; 
the grape phylloxera {Phylloxera vasfatrix} , undoubtedly of 
North American origin, are familiar examples. Among the cos- 
mopolitan Coleoptera, Trogosita mauritanica* Silvanus cassice, 
and perhaps other species of the same genus, Lasioderma serri- 
corne, Arceocerus fasciculatus, and some others, may with a 
greater or smaller degree of probability be claimed as natives of 
America. The notorious Colorado potato beetle {Doryphora 
lO-lineata) may also be adduced here as an example. It has, on 
several occasions, migrated across the Atlantic, and would no doubt 
have become acclimatized in Europe but for the energetic and 
successful measures for its extermination. 
INTENTIONAL INTRODUCTIONS. These include our domestic 
insects (honey-bee, silk-worm) , but there are no Coleoptera among 
them. The only species which may claim to be considered here 
are certain species of meal beetles, Tenebrio molitor, obscurus 
and opacus, the larvae of which, used as food for insectivorous 
song-birds, have been carried intentionally all over the world. 
But since these beetles and their larvae flourish in old flour, corn, 
cheese, etc., I suppose that, even without the assistance of man, 
they would have become cosmopolitan long ago. No attempts 
have been made hitherto intentionally to introduce beneficial pre- 
daceous Coleoptera such as Carabidce and Coccinellidce ; but I 
see the time is fast approaching when such attempts will be made 
in this country.* Some queer and unexpected experience will 
then be made, as I shall point out presently. 
NON-INTENTIONAL IMPORTATIONS AND NON-INTENTIONAL 
INTRODUCTIONS. There is an important difference between these 
two topics, but as this difference can be explained best by contrast- 
ing them they are considered at the same time. 
With our fast steamers, our lightning trains, our refrigerators, 
with our increased and increasing knowledge of the food habits 
and general natural history of insects, I assert that man. is able to 
transport safely almost any species of insect from any part of the 
* Since this address was delivered, Dr. C. V. Riley has succeeded in in- 
troducing and acclimatizing several Australian species of Coccinellidce in 
southern California. 
