lix 



in species in the northern regions and also in Chili, Araucania, 

 and the Falkland Islands, but not elsewhere South of Mexico in 

 the New World, nor of the Himalayas in the Old World. Mr. 

 M'Lachlan accounts for this by supposing that at the close of the 

 northern glacial epoch a few stragglers of these groups, instead 

 of wending their way northwards, mistook the points of the 

 compass, and went southwards. Mr. Wallace has replied to this 

 article in a subsequent number of ' Nature.' 



"A Cosmopolitan Butterfly; its Birthplace and Natural 

 History," is the title of a memoir, published by Mr. S. H. 

 Scudder, in the 'American Naturalist,' 1876. Vanessa Cardui is 

 the only butterfly whose range is so extended as to be termed 

 cosmopolitan ; and the enquiry as to its exact range, its natural 

 history, its migrations, the variation of the periodicity in different 

 seasons and in different countries, and the distribution of its 

 plant-foods, has resulted in several interesting points of general 

 interest. 



Memoirs containing descriptions of insects of various orders 

 and families inhabiting diff'erent countries are noticed in the 

 portion of this Address devoted to 



Descriptive Entomology. 



Crustacea. 



The first number of the ' Bulletin of the Natural-History 

 Society and Museum of Illinois' contains a paper, by S. A. 

 Forbes, on the Crustacea of that State, including twelve species 

 of Camharus (three of which are new), two species of Crangonyx, 

 and three Gammari. 



Descriptions of two new species of Crustacea from New 

 Zealand, Trichoplatus Huttoni (= HaUmus Hector, Murs.) and 

 Acanthophrys FWioti, are published by M. A. M. Edwards, in 

 Ann. Sc. Nat. (ser. vi., vol. iv.). 



The Crustacea, collected by the Rev. G. Brown " on Duke of 

 York Island," have been catalogued and described by Mr. Edward 

 J. Miers (Proceed. Zool Soc, February 20, 1877). They repre- 

 sent sixteen species, none of which are new to Science, and 

 belong to well-known forms, generally distributed throughout the 

 Indo-Pacific region. 



The same author has also publislied descriptions and figures 



