GEOGRAPHY OF THE GENERA. 
67 
Oar native species are found throughout France and Ger¬ 
many, Greece and Spain, still one or two seem limited 
to our islands. The genus is recorded as in Albania, 
Algeria, and Egypt; it is found on the western edge of 
Africa at the Canaries; it occurs also in northern 
India, in the United States, on the western side of South 
America at Chili, and then we have a wide gap, for 
its next appearance is at Sydney, New South Wales. 
About twenty species are known. 
The genus Andrena, although infinitely more nume¬ 
rous in species than the genus Halictus, which is also 
abundant, does not appear to have so wide a distribution 
as the latter. Peculiarities of habits possibly limit its 
diffusion, although nothing has occurred to naturalists 
to explain the circumstance, unless it be the adventi¬ 
tious fact of no specimens having fallen into the hands 
of the collector. Our own species, represented by one 
or several members, are found (although some seem re¬ 
stricted to England) throughout Europe, north and 
south, east and w^est, as also in its islands. In Africa it 
is seen in Algeria and Egypt, and it occurs in the Canaries; 
and in Asia it is found in Siberia, and in northern India ; 
but we have no connecting chain to link those Asiatic 
and African localities,—although w r e may well sup¬ 
pose that it might be discovered amongst the steppes 
of Thibet and Tartary, revelling amidst the flowers of 
their luxuriant pastures, and even amongst the Persian 
sands. It passes through the United States from Flo¬ 
rida up and to our own colony of Nova Scotia, and 
extends its range to Hudson’s Bay. We do not trace it 
further. Nearly two hundred species occur. 
The genus Cilissa, too, has a limited distribution, 
and occurs in the same countries, but ranges as high 
r 2 
