ILLUSTRATIONS 



PLATES. 



Page. 

 Plate I. Fig. 1. — Walnut trees infested by Hyphantria cunea. Fig. 2. — 



Choke-cherry trees defoliated by Hyphantria cunea 44 



II. Laboratory methods in the cotton boll weevil investigations: 

 Fig. 1. — Boxes used in breeding parasites and weevils. Fig. 

 2. — Breeding jar used in life-history work. Fig. 3. — Folding 

 cage used in field experiments. Fig. 4. — Wire-screened cage 



used in hibernation experiments 112 



III. Laboratory methods in the cotton boll weevil investigations: 

 Fig. 5. — Camera stand designed for both horizontal and ver- 

 tical work. Fig. 6. — Arrangement used in securing b'ack 

 backgrounds with camera horizontal. Fig. 7. — Chart making 

 with stereopticon for projecting image. Fig. 8.— Chart made 

 from negative image projected by electric light through copy- 

 ing camera 118 



TEXT FIGURES. 



Fig. 1. Cicada erratica: Adult female, and male and female details... 53 



2. Cicada erratica: Eggs and egg punctures 56 



3. Area in Louisiana infested by Anthonomus grandis in December, 



1903, and in December, 1904. 120 



4. Area in Louisiana infested by Anthonomus grandis in July, 1905 . . 122 



5. Area in Louisiana infested by Anthonomus grandis in December, 



1905 .... 124 



6. Podisus macuHventris: Variation of adults in form and size — par- 



ents and progeny . 156 



7. Schizoneura fodiens: Antenna of winged viviparous female 167 



8. Schizoneura fodiens: Pupal markings 167 



9. Schizoneura fodiens: Antenna of pupa 167 



10. Photographic print injured by Lepisma saccharina 175 



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