1 Plate XIV. 
Fig. 
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1. — Exit holes of moths from pupal cells in ground 
2. — Condition of moth immediately after emergence 
3.— BoUworm moth with wings expanded 
4. — Bollworm moth on the alert 
5. — Moth at rest on cotton leaf 
Variation in markings of bollworm moths 
Fig. 1. — Cotton square attacked by caterpillar of Ccdycopls 
cecrops. 
Figs. 2 and 3. — Larva of Prodenia ornithogaUi on cotton square 
and boll 
Fig. 4. — Moths of Prodenia ornithogaUi 
Fig. 1. — Breeding cage used in determining generations of boll- 
worm ; planted to corn 
Fig. 2. — Same, planted to cotton later in the season 
Fig. 1. — PoUstes annularis and nest 
2. — Lycosa riparia, with captured bollworm moth 
3. — A robber fly, Beromyia anguslipennis 
4. — Malloplwra orcina 
Fig. 5. — Metapodius femoratus, male and female 
Fig. l.—Microplitis nigripennis, adults, cocoons, and parasitized 
bollworm , 
Fig. 2. — Archytas piUventris, parasitic on bollworm 
Fig. 3. — Bollworm killed by bacterial disease : 
Fig. 4. — Bollworm killed by fungus 
Fig. 1. — Bollworm experimental farm at Willspoint, Tex 
Fig. 2. — Fertilized and unfertilized cotton plats at Willspoint, 
Tex 
Comparative maturity of King and Myers cottons grown under 
identical conditions 
Fig. 
Fig. 
Fig. 
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Fig. 1. — Proper use of corn as a trap crop 
Fig. 2. — Improper use of corn as a trap crop 
Fig. 1. — Method of poisoning cotton for leafworm and bollworm . 
Fig. 2. — View of spraying work in poison experiments 
Fig. 1. — Geared poison ''blower" for poisoning cotton 
Fig. 2. — Machine used in jarring and collecting boll worms from 
cotton 
Fig. l.-r-Cyanide light trap 
Fig. 2. — Pans with poisoned sweets 
TEXT FIGURES. 
Fig. 1. Map of area infested by bollworm 
2. Egg of bollworm ; side and top views 
S. Diagram showing "regular" and "irregular" oviposition curves 
4. Diagram showing relative length of egg stage '. 
5. Head of bollworm larva 
6. Diagrammatic representation of comparative rate of growth of larvae 
during different instars 
7. Diagram illustrating relative width and variation in width of the 
head casts of larvie in third and fourth instars 
8. Diagram of different types of pupal cells 
9. Enlarged caudal end of pupa 
10. Chart showing relative length of pupal stage 
11 . (Tcnitalia of male bollworm moth 
12. ' ' Sharpshooter, ' ' Homalodisca triquetra 106 
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