ILLUSTRATIONS. 



Page. 

 Plate III. Fig. 1. — Mesa near Koehler, N. Mex., with characteristic vegeta- 

 tion. Fig. 2. — Pasture nearly destroyed by New Mexico range 

 caterpillar. Fig. 3.— Egg masses of New Mexico range cater- 

 pillar (Hemileuca olivise) on a single plant of range grass 60 



IV. Fig. 1. — Male moths of New Mexico range caterpillar resting dur- 

 ing the day on stem of wild sunflower. Fig. 2. — Hatching of the 

 eggs of the New Mexico range caterpillar. 70 



TEXT FIGURES. 



Fig. 32. The New Mexico range caterpillar (Hemileuca olivise): 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 olivise: 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 



48. Chalcis ovata: Adult, pupa, pupal exuvia, parasitized pupa of tussock 



moth 89 



49. Pimpla sanguinipes: Adult insect 89 



50. Pimpla conquisitor: Adult, larva, pupa, details 90 



51. Tachina mella: Adult : 90 



52. Euphorocera claripennis: Adult, antenna, puparium 92 



53. Stenopogon picticornis: Adult 92 



IV 



