= es ies ; : 
- 
=> 
The track of the larva is very uniformly from the base of the head 
upward, and the younger larve are almost invariably found near the 
base and beginning their work on the florets there. It would seem, 
therefore, that the eggs are deposited at the base of the receptacle, and 
the larve upon hatching may begin at once upon the older florets. In 
working upward, roughly speaking, they usually form an irregular 
spiral track around the receptacle. | 
The delicate, white, silken cocoons of this insect are spun in the head 
among the dried florets, frass and bits of eroded but undevoured flow- 
ers So covering them with brown as to make them difficult of detection. 
The pupz work their way entirely out of their cocoons and drep to the 
ground before bursting their pupa cases, which may be found in abun- 
dance on the ground from which a brood has just issued. 
Tke second brood was observed pairing during the last week of 
July, and August 5 the larve were found in great numbers, one hay- 
ing at that time spun its cocoon preparatory to pupating. The rate of 
growth would seem to establish that there are three broods per year at 
Ames, and possibly, though not probably, four. [In advance from a 
forthcoming Bulletin, No. 14, of the lowa Experiment Station. ] 
Mr. Alwood presented a communication, of which — has furnished 
the following abstract : 
STANDARD FITTINGS FOR SPRAY MACHINERY. 
By Witii1aM B. ALwoop, Blacksburgh, Va. 
[ Abstract by author. ] 
It is my desire to briefly present to this Association a matter with 
which doubtless many of your members are already familiar, and which I 
feel confident will meet the hearty approval of all the economic workers. 
At the Champaign meeting of the Association of Agricultural Colleges 
and Experiment Stations, held in November, 1890, I presented a paper 
before the botanical section, dealing with some of the newer forms of 
-machinery used in fungicidal work, and pointed out the great inconven- 
iences under which we labored from the diversity of styles and sizes of 
fittings and thread connections used in the various machines now offered 
by manufacturers. Thesubject was considered of such importance that 
a motion was carried to ask the sections of entomology and horticul- 
ture to unite with the botanists in appointing a conjoint committee, 
which should be charged with recommending to manufacturers such 
styles and sizes of connections and fittings as were thought to be most 
convenient in the practical work of treating injurious inseets and the 
fungus diseases of plants. This committee, as finally organized, was 
composed of the writer, as chairman, Mr. D. G. Fairchild, assistant 
mycologist of the Department of Agriculture, and Prof. James Troop, 
horticulturist of the Indiana Experiment Station. 
