GEOGRAPHICAL DISTRIBUTION OF INSECTS. 499 
which appears common in Greenland, abundant in Bri- 
tain, and is dispersed over all Europe ; while D. latis- 
simus is more confined, neither ranging so far to the 
north or south ; and though found in Germany, not yet 
discovered in Britain. Other species have a still more 
extensive range, and are common to the old world and 
the new. Thus Dermestes murinus, Brachinus crepitans, 
Tetyra scarabccoides*, Pentatoma juniperina, Cercopis 
spumaria, Vanessa Antiopa, Polyommatus Argiolus, Hes- 
peri a Comma, Vespa vulgaris, Ophion lutcus, Helophilus 
pendulus, Oscinis Germinationis, and many besides, 
though sometimes varying slightly 5 , inhabit both Bri- 
tain and Canada: and though vast continents and oceans 
intervene between us, New Holland, and Japan; yet all 
have some insect productions in common. With the 
former we possess the painted-lady butterfly [Cinthia 
Car did), with scarcely a varying streak: and Thunberg, 
in his list of Japan insects, has mentioned more than 
forty species that are found also in this country. Whe- 
ther any species has a universal range may be doubted, 
unless indeed the flea and the louse may be excepted. 
On the other hand, some are confined within very nar- 
row limits. Apion Ulicis for instance, abundant upon 
Ulex europceus in Britain, has not, I believe, been found 
upon that plant on the continent. 
The geographical distribution of groups, is, however, 
a As this insect is the type of a distinct genus amongst the Saddle- 
ridce, I have distinguished it by the name Fabricius gave the whole 
tribe. 
b M. Latreille (Geographie, &c. 8.) seems to regard these varieties 
as distinct ; in which case they would be the representatives of the 
species named in the text: but the variations are mostly so slight, as 
not to afford any satisfactory distinctive characters. 
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