224 THE CANADIAN ENTOMOLOGIST, 



HISTORY OF THE PREPARATORY STAGES OF COLIAS 

 EURYDICE, BoiSD., WITH REMARKS UPON THE 

 GENUS MEGONOSTOMA, Reaki-rt. 



BY W. H. EDWARDS, COALBURGH, W. VA. 



Egg. — Shape of Eurytheme, fusiform, tapering evenly from the middle 

 to either extremity ; the base broad, the summit pointed, ribbed longi- 

 tudinally, and crossed by numerous striae ; color, pale green when first 

 laid ; later, changing to crimson ; duration of this stage about four days. 



Young Larva. — Length, . i inch ; cylindrical, thickest on two and three, 

 tapering slightly to thirteen ; each segment from two to thirteen several times 

 creased, and on the ridges thus caused are many fine black points, each with 

 minute black hair; scattered among these are larger black points, or 

 tubercles, some with long, tapering, black hairs, but most with long, white, 

 clubbed appendages \ on two there is a cross row of these in front of the 

 segment, five on either side, running from dorsum to base ; on three and 

 four are four each, also in front, but after four, there are three to the seg- 

 ment, disposed in triangle, two being in front, one on the last ridge ; these 

 form longitudinal rows ; thirteen has three black hairs on either side in 

 triangle, and from four to twelve are two black hairs at base of each ; 

 color, dull yellow-green ; feet and legs same ; head rounded, but little de- 

 pressed at top ; a few tubercles scattered over the face, each with long, 

 tapering, depressed, black hair ; color, pale yellow-brown. Duration of 

 this stage about four days. 



After first moult : — Length, .14 inch; color, yellow. green ; the ridges 

 thickly beset with black points, from which black hairs ; on two, three and 

 four these points are larger than elsewhere ; head shaped as before, the 

 depression being decided ; the tubercles and hairs more frequent ; color, 

 yellow-green, paler than body. As the stage proceeds, a yellow stripe 

 begins to show itself the length of body, below spiracles. To next moult 

 four to five days. 



After second moult: — Length, .22 inch; color, green, with black 

 points and hairs as in previous stage ; the band along base distinct, white ; 

 just over it, on three and four each, on the middle of the segment, is a 

 black bead-like process ; under side, blue-green ; head, yellow-green ; 

 thickly covered with fine black tubercles, each with a short, black hair, and 

 among them are about twelve of considerably larger size, with long hairs. 

 To next moult three days. 



