GEOGRAPHY OF THE GENERA. 
73 
in species, for, as far as they may be estimated from the 
contents of collections, its numbers do not reach twenty. 
Our own species occur throughout the whole of Europe, 
north and south. Others are found in Sicily, Albania, 
the Morea, and show themselves at Bagdad. The genus 
lias been sent from the Canaries, and crosses the tropics 
into Chili, but does not seem to have occurred elsewhere 
in either North or South America, although one of the 
genera ( Eucera) on which, with us, it is parasitical, is 
found in the latter country, and the other genus ( Antho- 
phora ), which it also infests, is found throughout the 
world, excepting in Australasia. In all those countries, 
the closely-allied exotic genus Crocisa, which is very 
numerous in species, may supply its place. 
The elegant genus Epeolus occurs in our own species 
throughout northern Europe, as high as Lapland, and * 
is found also at the southern extremity of the continent 
of the Old World, at the Cape of Good Hope. It has 
been brought from Sicily, and other species come from 
Siberia. The genus in America passes down from the 
United States, by w r ay of Mexico, to the Brazils, where 
it crosses the southern continent, having been trans¬ 
mitted from Chili. It is very limited in the number of 
its species, considering its wide diffusion, for not more 
than twenty are registered. It is almost identical in 
distribution with the genus Colletes, upon which it is 
with us parasitical. The species are never so large as 
those of the preceding genus, Melecta. 
The genus Stelis is limited both in number of 
species and distribution, although the spots whence 
it has come are wide apart. Our own species are 
found throughout Erance and northern Europe, as far 
as Finland. Other species occur in North America, and 
