176 THE CANADIAN ENTOMOLOGIST. 



DETAILS OF COMPARISON. 



Among the lunato'. there is only moderate variation, consisting chiefly 

 in less or greater development of the brown suffusion and the blue-black 

 shades ; in about seven specimens the dark shading is largely obsolete and 

 replaced by light brown in an area on f. w. from t. a. line to t. p. line and 

 beyond, extending partly to outer margin, but not reaching costa. There 

 is an appreciable though slight variation as to curves and dentations of 

 t. p. line. 



The Saiindersii present moderate variation as to amount of the white 

 decoration, and in several specimens this is almost replaced by greenish 

 white. There is some variation in tone of coloring, in degrees from 

 medium brown to dark, somewhat purplish brown. One or two show on 

 f. w. a somewhat yellowish light-brown area between t. a. and t. p. lines, 

 not reaching costa. A little variation in t. p. line. 



The edus(B vary slightly as to fullness of the white ovals or crescents 

 on margins. Also as to color of same ; some have crescents entirely 

 white, others have them greenish but outlined with clear white. On f. w. 

 of two examples area from t. a. to t. p. line is colored nearly uniform 

 yellow-brown, the dark shades almost obsolete. Regarding variation in 

 tone of coloring, the comment on Saiindersii applies equally to this set. 



EDUSA AND SAUNDERSII COMPARED. . 



Closely alike in size; if any difference, the latter average slightly 

 larger. 



Coloration, except as to degree of white, furnishes no means of 

 separation. 



In Saundersii the marginal crescents are merely sketched or outlined 

 with white, pearl, or greenish-gray ; in edusa the crescents are filled out 

 with an amplitude of white, &c., some specimens showing greenish-white 

 crescents outlined with clearer white. Saundersii looks like an unfinished 

 edusa. 



' In observing the white decoration, at first the division of the two sets 

 seems complete, but closer search discovers one edfisa from whose mar- 

 ginal crescents the white is about half obsolete, and among the Saundersii 

 are two whose crescents are so largely powdered with white that the step 

 between these two and the cited edusa is no wider than the interval 



