X PAPERS ON CEEEAL AND FORAGE INSECTS. 



Page. 



Fig. 10. The slender seed-corn ground-beetle: Details of adult 18 



11. The slender seed-corn ground-beetle: Beetles attacking a kernel of 



corn 20 



12. Work of the slender seed-corn ground-beetle 21 



13. A cornfield near New Paris, Ohio, about the first week in July, 1906, 

 . showing results of depredations by the slender seed-corn ground- 

 beetle 22 



14. Same field as in figure 12, about the first week of July, 1908, showing 



results of combined work of the slender seed-corn ground-beetle and 



cutworms ". 23 



15. The clover-root curculio (Sitones hispidulus) : Adult 34 



16. The clover-root curculio: Eggs 35 



17. The clover-root curculio: Larva 35 



18. The clover-root curculio: Pupa 35 



19. The clover-root curculio: Red-clover root showing effects of attack by 



larvae, and red-clover leaf showing work of adult beetles 36 



20. Sorghum heads: Partly destroyed by English sparrows, infested by 



sorghum midge ( Contarinia sorghicola), healthy 40 



21. Base map showing present distribution of the sorghum midge 42 



22. Growing sorghum head, bagged and tagged after natural infestation 



by the sorghum midge 43 



23. Breeding cage suspended over growing sorghum 44 



24. The sorghum midge (Contarinia sorghicola): Adult male and details. . 45 



25. The sorghum midge: Adult female and details, eggs, larvae, pupa... 46 



26. The sorghum midge: " Cocooned larvae," or hibernating form 48 



27. Sorghum heads, showing four successive stages in the opening of the 



sheath or ' ' boot " 50 



28. Sectional views of the sorghum seed during the flowering stage 51 



29. Aprostocetus diplosidis: Adult female 56 



30. Aprostocetus diplosidis: Adult male. 56 



31. Tetrastichus sp. : Adult female 57 



32. The New Mexico range caterpillar (Hemileuca olivix): Egg mass on 



weed stem 65 



33. The New Mexico range caterpillar: Larva, first stage 65 



34. The New Mexico range caterpillar: Larva, second stage 66 



35. The New Mexico range caterpillar: Larva, third stage 66 



36. The New Mexico range caterpillar: Larva, fourth stage 66 



37. The New Mexico range caterpillar: Larva, fifth stage 67 



38. The New Mexico range caterpillar: Pupa 67 



39. The New Mexico range caterpillar: Male moth and wing venation... 68 



40. Hemileuca olivix: Male genitalia 68 



41. The New Mexico range caterpillar: Female moth, wing venation, and 



details of antennae 69 



42. The New Mexico range caterpillar: Female moth in characteristic 



resting attitude 70 



43. The New Mexico range caterpillar: Larvae clustered on weed stem, 



to avoid heated surface of the ground 79 



44. The New Mexico range caterpillar: Single cocoon on Gutierrezia 80 



45. The New Mexico range caterpillar: A characteristic mass of cocoons 



in a single plant of Gutierrezia 81 



46. The New Mexico range caterpillar: Moths mating 84 



47. Diagram illustrating life cycle of Hemileuca olivise 85 



