33 
tracted to lights, while the female is rarely caught in fchia way. Of 
twenty-two specimens trapped twenty were males and two females. 
At a lamp experiment July n> nine specimens were captured^]ft] males. 
Mr. Banks often collected adults at random, and without regard to 
from cotton plants during the day. Eight specimens were taken oil 
one trip, four males and four females. July 15 fifteen were captured, 
fourteen being iemales and one mule. A third capture was found to 
contain six females and two females. This shows that females were 
plentiful in cotton fields at the time the lamp experiment had been made. 
but were not attracted. The damage to cotton by this species is due 
in great measure to the immature forms of the insect. 
It appears that during July and August cotton fields surrounded by 
poplar growths along the bayous suffer the greatest attack. This is to 
be expected, since during June the insect lives mostly upon these t: 
the young growth of which becomes too hard and tough later in the 
season. As has been stated, it is most numerous along river bottoms 
and bayous. Away from these regions this species is not at all com- 
mon in cotton fields. In the upland regions of Texas, where continuous 
observations for one week in August were made, not a single specimen 
was found upon cotton. 3Ir. Banks, who took an extensive trip through 
central and southwestern Texas during July, reports the rare occur- 
rence of this insect in those regions. Young poplar is probably their 
choice for food and egg deposition, but they are often found upon vari- 
ous kinds of weeds and miscellaneous plants. This being the case, the 
question of a remedy becomes a difficult one. The only recourse which 
seems at all practical is to control the number of young poplar trees 
along the bayous, keeping them at a minimum so as to obtain the 
maximum number of insects upon them. Then about the middle or 
latter part of June give them a thorough application of a strong solution 
of kerosene emulsion. This would kill many of the adults ami most of 
the young, which are abundant upon them at this time. 
Another nearly related species, Proconia inxl<(t<<, mostly found upon 
willow, is occasionally noted upon cotton. Whether its injury is similar 
to that of the Homalodisca has not been positively determined, but the 
facts already noted for the latter indicate that it may be. 
REMEDIES FOR THE BOLL WORM. 
LIGHTS FOB ATTRACTING THE MOTH. 
The experiments presented in Bulletin 24 (pp. 33-38] proved con- 
clusively that the ordinary lamps used by farmers and the methods of 
using them were inefficient. Until proven otherwise, the reasons .i^ 
Signed for such results were that the lights were not brilliant enough, 
together with being unprovided with extending wings as a background 
against which insects flying near by might strike and be trapped. A 
lamp was devised to meet all these requirements so that it could be ef- 
U935— No. 29 — -3 
