LLUSTRATIONS 



I'LATPJS. 



I'age. 

 Plate I. Fig. 1. — Walnnt trees infested by Hypliantria cnnea. Fig. 2. — 



Choke-clierry trees defoliated by Hi/p]i(iiitri<( ciuiea .... 44 



II. Laboratory uietliods in the cotton boll weevil investigations: 

 Fig. 1. — Boxes nsed 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 woi'k. Fig. 6. — Arrangement used in seciiring 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, 190.") _ _ 122 



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



1905 124 



6. Podisiis maciiliventris: Variation of adults in form and size — par- 



ents and progeny 156 



7. Schizoneura fodii'iis: Antenna of winged viviparous female 167 



8. Schizoneura fodiens: Pupal markings . 167 



9. Schizoneura fodiens: Antenna of pupa 167 



10. Photographic print injured by Lepisnia saccharina ... 175 



4 



