160 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[160 



EXPLANATION OF PLATE 



Fig. 69. 



Fig. 70. 

 Fig. 71. 

 Fig. 72. 



Fig- 73- 



Fig. 74- 



Fig. 75- 

 Fig. 76. 

 Fig. 77. 

 Fig. 78. 



Thyridopteryx ephemeraeformis, Psychidae. Showing portion of protho- 

 rax which bears peculiar horizontal spiracle. 



Acrobasis betulella, Pyralididae. Ocellar group. 



Plodia interpunctclla, Pyralididae. Ocellar group. 



Zeus era pyrina, Cossidae. Head, cephalodorsal aspect, showing the very 

 large mandibles. 



Euptoicta claudia, Nymphalidae. Subdorsal scolus of third abdominal 

 segment. 



Polygonia interrogationis, Nymphalidae. Subdorsal scolus of eighth ab- 

 dominal segment. 



Ocellar arrangement similar to that of Podoscsia, Aegeriidae. 



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



Sanninoidea exitiosa, Aegeriidae. Ocellar group. 



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 adfrontal seta; afp — adfrontal puncture, 

 borne on adfrontals between adfrontal setae. 



Estigmcne acraea, Arctiidae. Spiracle. 



Depressaria sp., Oecophoridae. Ocellar group. 



Anacampsis populella, Gelechiidae. Ocellar group. 



Oiketicus abbotii, Psychidae. Front and adfrontals. 



Solenobia walshella, Psychidae. Front and adfrontals. 



Suranal plate of a European species of Agapetidae. 



Tliyridoptcryx ephemeraeformis, Psychidae. Proleg. 



Celama triquctrana, Nolidae. Ocellar group. 



Nola apera, Nolidae. Ocellar group. 



