APPENDIX. 
The following generic and specific description is reprinted from 
"The pink bollworm, Pectinopliora gossyiriella" by August Busck, 
Journal of Agricultural Kesearch, vol. 9, no. 10, Washington, D. C, 
June 4, 1917. 
HOW TO DISTINGUISH THE PINK BOLLWORM IN THE FIELD. 
Definite and final determination of P. gossypiella in any stage can be made only by 
the aid of the microscope; and, unless a collector or inspector is thoroughly familiar 
with the species, all suspected material should be sent at once to the Bureau of 
Entomology for determination. Even a fraction of the insect in any of its stages can 
be recognized under the microscope by the characters given in succeeding sections 
of this paper. 
"J 
Fig. 4.— Pink bollworm: Adult. (Busck.) 
The following essential characters, all of which can be discerned by the aid of a 
common pocket lens, will enable the practical worker to make a reasonably certain 
preliminary determination of the insect in all its stages in the field. 
If a small dark-brown moth is caught in the cotton field or in a cotton mill or ware- 
house and is found to have the fore wings pointed and the hindwings broad and sinuated 
below the tip and to possess long curved palpi and long stiff hairs on the first antennal 
joint, it is reasonably certain that the moth is P. gossypiella, the adult of the pink boll- 
worm (fig. 4, A). 
If, within the cotton boll or associated with stored cottonseed, a small white or 
pinkish caterpillar with brown head is found and under a hand lens the mandibles are 
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