612 ADDRESS OF PROFESSOR LOVERING. 
As the development of the genital glands has already begun 
during the larval state, so during all the pupa state it steadily 
goes on, the copulatory pouch, the accessory glands, and recep- 
taculum seminis, are developed with the new alimentary canal in 
the last section of the period of development. The genital glands 
of the male only attain their development during the pupal state, 
The eggs are developed directly after the exclusion of the fly. 
The final perfection of the external form is the coloring of the 
chitinous skin. Shortly after, on the 18th to 20th day, follows the 
hatching of the egg. 
ADDRESS OF PROFESSOR JOSEPH LOVERING.* 
GENTLEMEN AND LADIES OF THE AMERICAN ASSOCIATION FOR 
THE ADVANCEMENT OF SCIENCE :— 
Wuen the States General of France were assembled for the last 
time at Versailles, after a long interval of inactivity, and an inaug- 
ural address was pronounced by the Bishop of Nancy, Mirabeau 
passed upon his performance the sweeping criticism that he had 
missed the grandest opportunity ever offered to man for saying 
something or holding his tongue. And, whenever this Associa 
tion, comprising not only those who teach, but many who Cret” 
science, assembles, as it now does, to listen to the address of its 
retiring President, if he is duly sensible of his responsibility, be 
would gladly avail himself of Mirabeau’s alternative, either © 
being equal to the occasion or of being silent. But the rule of gi 
Association, adopted in the original draft of the constitution at 
` Philadelphia, and the example of my predecessors which I 9 
unwilling to reverse, leave me no choice; and when I see or 
me, not the terrible monsters of the French revolution, madde 
by the miseries of a downtrodden country, but calm ane high 
minded lovers of truth, I feel sure of a just and generous bape 
Welcome, then, the precious opportunity, enjoyed by the 
of Sch 
*The retiring President of the American Association for the Advancement 
ence, delivered at the Hartford meeting. 
