110 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[110 



Ianassa lignicolor, in all except the last stage, is very similar to 

 Schizura unicornis. The striped head, with three niesal white marks 

 in a vertical row, will distinguish it, the head of S. unicornis being 

 unicolorous red. 



Ptilodon americana is called Odontosia camelina by Packard. The 

 larva is very distinct from Odontosia elegans. 



Hyperaesehra shauld apparently be divided into two genera, for 

 the larvae of H. gcorgica and H. stragula are very different. 



Didugua Druce was erected for the species argentilinea Druce, 

 found in Texas. The coloration is distinctive. 



The following species of Notodontidae were examined: 

 Melalopha — all listed species 



Pheosia dimidiata 

 Ptilodon americana 

 Nerice bidentata 

 Hyperaesehra stragula 



H. gcorgica 

 Symmerista albifrons 

 Odontosia elegans 

 Ellida caniplaga 

 Dasylophia anguina 

 Didugua argentilinea Druce 

 Fentonia marthesia 

 Heterocampa obliqua 

 H. picta 

 H. umbrata 

 II. manteo 

 H. biundata 

 H. guttivitta 

 H. bili m at a 

 Litodonta hydromeli 

 Loph odonta ferruginea 



L. angulosa 

 Gluphisia septentrionalis 

 Misogada unicolor 

 Nadata gibbosa 



Family Dioptidae 



Phryganidia californica, the only species of this family found in 

 North America, is described and figured by Kellogg and Jackson in 



