10 PLANT-BUGS INJURIOUS TO COTTON BOLLS. 



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Fig. 5. The conchuela: Nymph, fourth instar 28 



6. The conchuela: Nymph, fifth instar 29 



7. Diagram of a portion of the Tlahualilo Cotton Estates 50 



8. Telenomus ashmeadi, an important parasite of the conchuela (Penta- 



toma ligata) 63 



9. Plan for the construction of a collecting can for use in hand-picking 



cotton plant-bugs 69 



10. The grain bug {Pentatoma sayi) : Nymph, first instar 72 



11. The grain bug: Nymph, fifth instar 73 



12. The brown cotton-bug (Euschistus servus): Nymph, first instar 74 



13. The brown cotton-bug: Nymph, fifth instar. 75 



14. The green soldier-bug {Nezara hilaris) : Nymph, first instar 78 



15. The green soldier-bug: Nymph, fifth instar; light and dark types 79 



16. Nezara viridula: Nymph, fifth instar; light and dark types 83 



17 . Thyanta custator: Nymph, first instar 84 



18. Thyanta custator: Nymph, fifth instar; light and dark types 85 



19. The leaf-footed plant-bug (Leptoglossus phyllopus) : Adult 88 



20. The northern leaf-footed plant-bug (Leptoglossus oppositus): Eggs and 



adult 90 



21. The northern leaf-footed plant-bug: Nymphs 90 



22. Trichopoda pennipes, a Tachinid parasite of Coreid plant-bugs 92 



23. The cotton leaf-bug ( Calocoris rapidus) : Nymphs and adult 93 



24. The bordered plant-bug {Largus succinctus) : Nymph, first instar 94 



25. The bordered plant-bug: Nymph, fifth instar 95 



