ENCLOSURE TO PART IV. ) 
Mr. HARDENBERG said that it had been suggested that larve 
might breed in the roots of the sweet thorn. and that investigations in 
this direction should be made. 
The Section considered— 
That the study of the wild food-plants of the Sudan Boll 
Worm is of great importance, and calls for further thorough 
investigation. 
VALUE OF CONTROL OF BOLL WORMS OTHER THAN PINK 
BOLL WORM. 
BARON SURCOUF had found many parasites of the boll worm 
in Portuguese East Africa. 
Mr. SMEE said that parasites were unknown in Nyasaland. 
Mr. RITCHIE said that in Tanganyika Territory only one 
generation of Chloridea was known to occur on cotton bolls annually. 
Subsequent to June the crop was free from Chloridea. 
Mr. SMEE said that in Nyasaland tobacco was first attacked, and 
when the tobacco crop was harvested the Chloridea passed on to the 
cotton. 
The Chairman read the following notes contributed by Mr. 
Haines: — 
SupaN BorLworM. 
Two egg parasites (spp. undet.) have been reared but only 5 or 
69% of the eggs examined were parasitized. 
Two larval parasites (spp. undet.), a Tachinid and a Braconid (?) 
were also reared. 
I have also found pupa containing exit holes of parasites, but no 
specimens have been reared. 
At least three or four species of wasps have been found actively 
engaged on larva-hunts in cotton fields and they have been observed 
to catch bollworm larve. 
A Pentatomid bug, Glypsus conspicuous, has been observed 
sucking out larvae of this bollworm. 
AMERICAN BoLLworMm. 
Two egg parasites have been reared, and late in the season the 
percentage of parasitism may run as high as 509. 
One Tachinid larval parasite has been reared. The same 
predators, as mentioned above, have been observed preving on this 
bollworm. 
Earias INsunana. 
Two hymenopterous larval parasites have been reared. Parasitism 
has been very heavy in some instances, and at times appears to give 
effective control. 
The value of control by natural enemies (including parasites) has 
not been lost sight of; but, except for the American and spiny boll- 
worms in a few cases, efficient control does not seem to obtain in 
nature. These enemies and parasites have been sent to London for 
determination. Further studies will be made. both as to species 
VIF