486 Recent Literature. [ August, 
try east of the [Rocky] mountains, extending from the Black Hills to 
Mexico, where it becomes scarce, and is represented by Doryphora unde- 
cimlineata and D. melanothorax.” With this latter view we entirely coin- 
cide, but Walsh’s idea of its being a mountain-insect is erroneous, as it 
does not injure the potato fields in Colorado above an altitude of about 
seven thousand feet, is confined mostly to the plains, and is a subtropical 
insect, with its allies living on the plains of Mexico, Central America, 
and New Grenada. He opposes the view, and we think with good 
reason, that the beetle is poisonous. The reporter shows that the two 
species of canker worm differ so much in the egg, larva, pupa, and 
adult state as to belong to different genera. While we should hardly 
be inclined to separate the two species generically, entomologists are 
greatly indebted to Dr. Riley for the mass of new facts regarding their 
specific distinctions which he has presented with pen, and pencil. 
The chapter on the locust affords interesting reading, and contains 
valuable suggestions as to the best means of withstanding its attacks, 
for which government aid is invoked. New facts regarding the grape 
Phylloxera and army worm, and an essay on the yucca borer, also 
aid in rendering the report one of the most interesting and practically 
valuable that has yet been issued. 
Tue ZooLocicaL Record ror 1874.1— On opening this volume, 
which has just been received, our attention is drawn to the increasing 
amount of work done by American zoodlogists, which bears a fair propor- 
tion to the amount of labor performed by other nations. The recorder 
of literature on mammalia says that, “as in 1873, special notice is due to 
the labors of Leidy, Marsh, and Cope, among the remains of the mam- 
mals of the American tertiary periods.” In the portion on birds the 
recorders state that “the striking discoveries for the year 1874 are 
limited in number ; but some remarkable books have nevertheless been 
produced during its course, the chief of which must be reckoned the 
great works on North American birds by Messrs. Baird, Brewer, and 
Ridgway, and Coues.” The researches of Professor Morse on the Brachi- 
opods, and of Mr. A. Agassiz on the Echini and the embryology of the 
Ctenophora, are noticed at greater or less length. We repeat what we 
. a 
mals act, think, and are mutually related may be presented m en 
record of zoölogical discovery as the present. Systematic zoölogy 
largely dictionary-work, and preparatory to true biological studies. 
of Zoolog- 
Zoölogical Record Sor 1874; being Volume Eleventh of the pert 8v0, 
1 The 
ical Literature. Edited by E. C. Rre. London: John Van Voorst. 
pp. 557. 
