160 ILLINOIS BIOLOGICAL MONOGRAPHS [160 



EXPLANATION OF PLATE 



Fig. 69. Thyridopteryx ephemeraeformis, Psychidae. Showing portion of protho- 

 rax which bears peculiar horizontal spiracle. 



Fig. 70. Acrohasis betulella, Pyralididae. Ocellar group. 



Fig. 71. Plodia interpunctella, Pyralididae. Ocellar group. 



Fig. 72. Zeuzera pyrina, Cossidae. Head, cephalodorsal aspect, showing the very 

 large mandibles. 



Fig. 73. Euptoieta claudia, Nymphalidae. Subdorsal scolus of third abdominal 

 segment. 



Fig. 74. Polygonia interrogationis, Nymphalidae. Subdorsal scolus of eighth ab- 

 dominal segment. 



Fig. 75. Ocellar arrangement similar to that of Podosesia, Aegeriidae. 



Fig. 76. Eurycittarus confederata, Psychidae. Front, adfrontals, and their setae. 



Fig. yj. Sanninoidea exitiosa, Aegeriidae. Ocellar group. 



Fig. 78. Thyridopteryx ephemeraeformis, Psychidae. Head. In all the head fig- 

 ures of the plate : fp — frontal puncture ; f — frontal seta ; afi — first 

 adfrontal seta ; afii — second adf rontal seta ; afp — adfrontal puncture, 

 borne on adfrontals between adfrontal setae. 



Fig. 79. Estigmene acraea, Arctiidae. Spiracle. 



Fig. 80. Depressaria sp., Oecophoridae. Ocellar group. 



Fig. 81. Anacampsis populella, Gelechiidae. Ocellar group. « 



Fig. 82. Oiketicus abbotii, Psychidae. Front and adfrontals. 



Fig. 83. Solenobia walshella, Psychidae. Front and adfrontals. 



Fig. 84. Suranal plate of a European species of Agapetidae. 



Fig. 85. Thyridopteryx ephemeraeformis, Psychidae. Proleg. 



Fig. 86. Celama triquetrana, Nolidae. Ocellar group. 



Fig. 87. Nola apera, Nolidae. Ocellar group. 



