THE CANADIAN ENTOMOLOGIST. 379 



outer side of anal loop in hind wings 

 about as long as inner side of tri- 

 angle 2. vmtata Hagen. 



DD. Abdomen (excl. appendages) less than 

 three and one-half times as long as 

 thorax ; a prominent ventral tubercle 

 on seg. i; superior appendages about 

 seven times as long as their greatest 

 width, inferior subbasal tubercle at 

 one-fourth to one-fifth the length of 

 the appendage ; height of superior 

 carina above outer margin, in profile, 

 not less than depth of appendage 

 directly below it, its length distinctly 

 more than one-third that of the ap- 

 pendage ; outer side of anal loop in 

 hind wings longer than inner side of 

 triangle 3. imdticolor Hagen. 



BB. Abdominal seg. i without a ventral tubercle ; segment 10 

 without a median dorsal tooth ; superior appendages 

 without a superior carina, not apically forked, but with 

 an anteapical inferior spine, the apices broad and 

 rounded {cyanea group). 



E. A black Hne (rarely absent) on the fronto-nasal 

 suture ; face pale yellowish ; dorsal thoracic 

 bands i mm. or less broad, tapering somewhat 

 towards each end, or sometimes suddenly ex- 

 panded at the extreme posterior end; lateral 

 thoracic bands nearly straight and equal ; spots 

 on abdomen blue, of moderate or large size, 

 PD on seg. 9 distinctly more than one-half as 

 long as the dorsum of the segment ; lateral 

 carina of seg. 7 in ventral view slightly or not 

 at all sinuate ; generally one cell between Aj, 

 i at its origin and the anal 



triangle 4- palmata Hagen- 



