eee Ce a. 
RECENT STUDIES IN INSECT ANATOMY.’ 
THIRD ANNUAL ADDRESS OF THE PRESIDENT. 
In the annual address expected from the 
chair of the Cambridge Entomological club, 
your first President discussed the then re- 
cent contributions to our knowledge of the 
life-history of insects, and last year some 
of the phenomena of their geographical dis- 
tribution were brought to your notice; a 
third side of entomological study fortu- 
nately remauns for me, and so— simply 
as a recorder, not as a critic —I will en- 
deavor to lay before you tonight a brief re- 
view of the works relating to insect anat- 
omy and physiology which have been pub- 
lished during the past two years. As this 
could not have been attempted, without 
the aid of Prof. Carus’ Zoologischer An- 
zeiger, let me join in the paean which 
grateful zoologists raise to the editor and 
publisher of this invaluable record of zo- 
ological progress.? 
We find very few general works, as one 
may suppose, to be noticed. The conclud- 
ing part of Dr. Graber’s useful manual 
1 After much of this address was written, the 
record by Mr. Frank Crisp in the Monthly Journ. 
Royal Micros. Society came to my notice, and 
proved useful, as will be seen, in many cases. 
2 Les Abeilles, organs et functions, ete. Paris, 
Bailliere, Dec. 1878. 288 p., 1 pl., 30 figs. 
’ 
‘*Die Insecten,” has just appeared. It 
contains the chapters on embryology and 
development, and as the first general sketch 
of the subject, its publication is certainly 
epoch-making. Mr. Emerton’s ‘ Struc- 
ture and Habits of Spiders” contains much 
on the anatomy and development of these 
animals, and, with its numerous original 
figures, will be of great service to general 
students. 
Mr. Maurice Girard? has published a 
work on bees, which I have not yet seen. 
And this is also the case with Dr. H. Gren- 
acher’s large work on the structure of the 
arthopod eye.? 
The first annual report of the U. S. En- 
tomological Commission contains a general 
sketch of the anatomy of Caloptenus, by 
Dr. Packard, the most important part of 
which is the description of the respiratory 
system, with its tracheae and air-sacs. 
There is also a section* on the histology 
of the digestive tract, by Dr. C. S. Minot. 
Previously unnoticed structures, in the shape 
3 Untersuch. u. d. Sehorgan der Arthropoden. 
Gottingen, 1879. 
*See also Dr. Minot’s article, Amer. Nat., 
(June 1878,) v. 12, p. 339. 
