REVIEWS. - 541 
tern METABOLIA, as the vA we agree - e ving a perfect metamorphosis; for the second and 
lower series the term HE OMETABOLIA is proposed, as the four suborders comprised in it 
differ in the degrees of c siga 5. lok metamorphoses, and are all linked together by 
the structural features enumerated on page 
The classification of the Hymenoptera is or igit al with the author, the 
placed highest, and the saw-flies and Uroceridx lowest. The — of "n families 19: the 
ers » ma now generally agreed upon by entamiologish the 
Diptera h i tion, 



s been 
followed with some modifications, Haliday’s Papae that 2 tese are allied to the 
Mycetophi ive " apine to fheir position tn among the higher Diptera. Leconte's 
Classification of tl as tese n ha qe i. e., to the Bruchids; for 
EE 

nt 
sented. The arrang f the Neuroptera (in the Linnsan sense) is that of Dr. Hagen, 
Published in his ** ave ^" with the addition, however, of the Lepismatidz, Campodez and 
Podurid: - 
The usual classification of the Arachnida is modified by placing the Phalangid:e as a family 
etit the Pedipalp — me MOONEE of Tenit ies of this suborder is suggested as being a 

The arrangement "- ps  Araneina inne as authors have left it, is that adopted by Ger- 
staeck s' * Handbuch der Zoologie." In the succession of the families of 
-- ponte the suggestions of hrs in his * Studien. der Acariden, és have been followed; 
fti + anf tl 


a 
Seta s elaborate work on the * Evolution of Spiders." 
_ Succeeding the preface a page or more is dgoted to **acknowledg- 
ments,” where the author gives the source of each figure in the work. 
This was the more necessary, as the plan adopted in the two first parts, 
of giving the name of the person from whose work the figure was bor- . 
rowed was found to be too cumbrous and expensive. 
The ** Guide" is already in use in some of our principal colleges and 
agricultural schools as a text book, or for reference, and seems to have 
et with favor from teachers em naturalists. The first edition has been 
about ote and a new one will be issued at an early date. The 
rapid sale of the book — the A edition being nearly RDN a before 
the issue g the last part — indicates the large number of ers o 
mology in this country, and the growing sense of the Diver daos of the 
Study of practical entomology by agriculturists. ` 
ORIGIN oF THE BIG Mounp or Sr. Lours.* — Professor Spencer Smith, 
in a paper read before the Academy of Science of St. Louis, states -— 
t 
banks of the sitas But few relics were found during the removal of the 
mound, and nothing, Mr. Smith thinks, that would indicate anything 
more than cs es Indians took advantage of the mound to bury their 
dead as they would in any high place. 

* Seven pages, 8vo, Oct., 1869. From the Author, 

