LLUSTRATIONS. 



Page. 

 Plate T. Weather-recording apparatus and fence-row shelter. Fig. I. 

 Weather apparatus used in recording temperature and humidity 

 conditions. Fig. 2. Typical weedj fence-row, affording excel- 

 lent Bhelter for weevils 30 



II. Favorable shelter conditions in and around fields. Fig. I. Cotton 

 field adjoining grove of trees laden with Spanish moss Tillandsia 

 usneoides). Fig. 2. Near view of moss. Fig. 3. Cotton stalk 

 having many bolls infested by weevils al hibernation time 30 



III. Seed house and hibernation cage, Keatchie, La. Fig. I. Seed house 

 opposite which the firsl Bign of weevil work was found al Keatchie, 

 La., in 1905. Fig. 2. — Larue cage buill for hibernation experi- 

 ments in 1905-G 38 



[V. Hibernation experiments, Dallas, Tex., 1905-6. Fig. I. Four-section 

 cage used for experiments, built over col ton. Fig. 2. — Shelter con- 

 ditions as occurring naturally in section I 50 



V. Shelter conditions in Dallas, Tex., experiments, 1905-0. Fig. 1. — 

 Piled cotton stalks and piled boxes in section 2. Fig. 2. — Stand- 

 ing cotton stalks versus piled leaves, section 3 50 



VI. Cages for hibernation experiments in Texas, 1906-7. Fig. 1. — Dallas, 

 Tex., cage on flat, black-waxy land. Fig. 2. — Calvert, Tex., cage 

 on slightly sloping, sandy land in post-oak region. Fig. 3. — 

 Victoria, Tex., cage on sandy-loam slope between bottom and 



upland 56 



VII. Shelter conditions, Dallas, Tex., cage. Fig. 1. — Active weevils try- 

 ing to escape through wire on October 20, 1906. Fig. 2. — Section 

 1, in which weevils were placed October 13, 1906, 2.61 per cent 

 surviving. Fig. 3. — Section 4, started October 16, 1906, 4.07 per 



cent surviving 64 



VIII. Hanging moss as affecting hibernation and emergence. Fig. 1. — 

 Section 7. with hanging moss in top of cage. Fig. 2. — Same sec- 

 tion, ground conditions, started October 24, 1906, 6.95 per cent 

 surviving; emergence ceased June 17, 1907 74 



IX. Shelter conditions producing average survival at Dallas, Tex. Fig. 

 1. — Section 8, started October 30, 1906; emergence ceased June 15, 

 L907; survival, 8.85 percent. Fig. 2. — Section 5, .-tailed Novem- 

 ber 5, 1906; emergence ceased May 15, 1907; survival, L2.22 per 

 cent. Fig. 3. Section3, started November 12,1906; emergence 



ceased May 21, L907; survival, 14.74 per cent 74 



X. Exceptionally favorable conditions and boll experiment. Fig. 1. — 

 Section L0, a, bolls exposed on surface; 6, corner where bolls 

 were buried 2 inches dee]), started December 6, L906; emergence 

 ceased May 2, 1907; survival, L51 per cent. Fig. 2. Section 9, 

 stalk- left, started November L3, L906; emergence ceased June 



L9, L907; survival, 25.92 per cenl 74 



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