ILLINOIS BIOLOGICAL MONOGRAPHS [344 



EXPLANATION OF PLATE VIII 



THORACIC AND ABDOMINAL SETAE, LEGS 



47. Cirphis unipuncia, last instar, setal maps of thoracic and first abdominal segments. 



48. Cirphis unipuncta, last instar, setal maps of second, third, fourth, and fifth abdominal 

 segments. 



49. Cirphis unipuncta, last instar, setal maps of seventh, eighth, ninth, and tenth abdominal 

 segments. 



50. Cirphis unipuncta, last instar, a median larvapod, lateral aspect. 



51. Cirphis zmiptmcta, last instar, a median larvapod, mesal aspect. 



52. Cirphis unipuncta, last instar, anal lar\-apod, mesal aspect. 



53. ScoUcocampa liburna, last instar, and lars'apod, lateral aspect. 



54. Cirphis unipiincla, last instar, prothoracic leg, cephalic aspect. 



55. Cirphis unipuncta, last instar, prothoracic leg, caudal aspect. 



56. Cirphis unipuncia, last instar, claw of prothoracic leg. 



57. Cirphis unipuncta, last instar, distal portion of a median larvapod, distal aspect. 



58. Cirphis unipuncta, last instar, distal portion of a median larvapod, mesal aspect. 



59. Cirphis unipuncta, last instar, mesal aspect of crochets. 



60. Diagram representing the phylogeny of the short epicranial stem as derived from a 

 study confined to the last instar. Erroneous interpretation. 



61. Diagram representing the phylogeny of the short epicranial stem as derived from postem- 

 bryological study. Correct interpretation. 



c0 crochet «<i muscle attachment 



cw claw sr sensorium 



ex coxa ' tibia 



fe femur Is tarsus 



lop larv'apod 



