296 Say^s Descriptions of 



V 



I 



rounded hexangular, with abbreviated nervures from the 

 two outer angles ; a white line passes through the cubital 

 celkiles, and a white spot is in the outer discoidal cellule : 

 ahdomen rufous or bright honey-yellow ; first or petiole 

 segment black : feet silvery hairy. 



Length from half an inch to nearly seven tenths. 



The neuration of the wings is much like that of the 

 M. Italica, F. even to the white line and small spot; 

 but the third cubital cellule is still more regularly hexa- 

 gonal and the radial celkile is not truncate at tip like 



those of the Italica and mdanara, Klug, and many other 

 species. 



3. M, vigilans. ^ Black; la ^ 



excepting its anterior and posterior margins^ rufous. 



Inhabits Pennsylvania, 



Body black ; with large, dense punctures : thorax 

 with three^j somewhat elevated lines and a slight appear- 

 ance of another each side : wing-scale convex, lineate on 

 the margin ; the outer and hinder margins lineated with 

 minute, elevated, parallel lines: tvings purplish-black; 

 radial cellule truncate at tip ; first cubital cellule bisected 

 by a white line ; second cubital gradually and regularly 

 narrowed to the base, with an abbreviated white line at 

 tip; third cubital hexagonal, not contracted, the two ex- 

 terior angles with abbreviated nervures ; exterior discoidal 

 cellule with a white dot : metathorax discoidally punc- 

 tured ; dorsal groove extending beyond the middle; 



\ 



O 



large basal segment of the abdomen with large remote 

 punctures, smaller and closer on the sides, bright rufous, 

 Its basal and terminal margins black. 



Length over three fifths of an inch. 



Resembles M. Mlica, F. but differs in greater depth 

 of color, in the lineations of the wing-scale, greater length 



