1884.] 
We still need a brief class-book of mineralogy for college stu- 
dents and beginners, one which shall lead the student to carefully 
examine at least the physical characters of not over, say a hun- 
dred, of our rock-making and other more important minerals, such 
as are constantly met with by amateurs, miners and prospectors. 
Such a book should also enter fully into the methods of study for 
the examination of minerals by their physical characters, com- 
prising a set of object-lessons which may be made of much value 
and interest to college and other classes. 
Recent Literature. 711 
THIRD Report oF THE U. S. ENTOMOLOGICAL COMMISSION.— 
This report forms a volume of 550 pages, with an appendix of 
nearly 100 pages, and is illustrated by sixty-four plates. It is 
divided into three parts. Part I, in reference to the Rocky Moun- 
tain locust, has five chapters. Chapter I comprises additions to 
the chronology of locust ravages in 1880 and 1881. Chapters 2, 
gand 4, by Mr. Lawrence Bruner, contain his reports and notes 
on the locust and cricket (Anabrus), giving the results of the ex- 
tions made by him under direction of the Commission, into 
orthern Montana and British America, Chapter 5 is an essay 
on “the data obtained frora solar physics and earthquake commo- 
tions applied to elucidate locust multiplication and migration,” by 
A. H. Swinton, of England, communicated by him and published 
ommission without its endorsing all the author’s views: 
Part II Comprises chapters 6-8, the 6th on the army worm; 
T oo forest insects, illustrated with numerous drawings by Dr. C. 
- Gissler, 
: PUT I2 p S! phi- 
locust g of North America, with remarks on the distribution of 
