114 Mil. Y. SMITU ON THE GEOOfiAPniCAIi DISTRIBUTION 



genus Halictiis have occurred in Australia ; two or three are from 

 the Arctic regions. 



The genus Andrena is the most numerous in species of the whole 

 tribe of the Anthophila : about one hundred and fifty species are 

 described ; they are almost exclusively confined to the temperate 

 portions of the globe. About one-half of the known species are 

 found in Britain ; twenty have been recorded from North America ; 

 the remainder occur in the south of Europe, Madeira, and Algeria. 

 The species found in this country are generally distributed through- 

 out the north of Europe ; and a few of them reappear in North 

 America : A. Clarlcella occurs in Nova Scotia ; A. perplexa cannot 

 be separated from our A. nitida, and several other species appear 

 to be common alike to Great Britain and America. A. Sattor- 

 jiana, which occurs in the south of Europe, ranges thence as far 

 north as Finland ; and A. cineraria has an equally wide geogra- 

 phical range. A. pilipes occurs in Finland, is common throughout 

 Europe, and penetrates into North Africa. A. varians is equally 

 common in the same localities, and is also found in Nova Scotia ; 

 A. albicajis has a similar distribution. 



Osmia is a genus consisting of about fifty species, forty of 

 which are confined to Europe, many of them being very generally 

 distributed. O. cenea is perhaps the most widely scattered of any 

 known species ; it is common in all parts of Europe ; it occurs in 

 Madeira, in the Canaries, and is also found in Algeria ; several 

 species are common in Egypt ; the genus is found at Port Natal ; 

 but not a single species is known from the East or from 

 Australia. 



Of all the genera of Bees, Megachile is perhaps the most truly 

 cosmopolitan : in temperate latitudes, in the tropics, and in the 

 arctic regions these Bees are alike found ; Sir John Richardson 

 brought species from Lake Winipeg ; many are known Irom 

 Hudson's Bay and Nova Scotia. The type of the genus, M. cen- 

 tuncularis, occurs throughout Europe, and is also found in the 

 United States, in Canada, and at Hudson's Bay. About twenty 

 species are known from Australia, twice that number from Africa, 

 twenty-six from India, and Mr. Wallace has added twenty-one 

 new ones from the Eastern Archipelago. 



Of the genus Antliidium about one hundred species are known, 

 but only one is found in Britain, A. manicatum ; this Bee is 

 common throughout Europe. About thirty-nine species occur in 

 the continent of Europe, and about the same number are known 

 from Africa, six or seven from Brazil and Chili, and about ten 



