ARUYNNIS VII. 



ARGYNNIS DIANA. 



Argynnis Diana, Cramer, II., pi. 98. Edwards But. N. A., Vol. I. plate 20. 

 DESCRIPTIOX OF PREPAR.A.TORY STAGES. 



Egg. — Height, .086 inch, breadth at base, .09, at summit, .034; conoidal, 

 truncated, depressed at summit, marked vertically by aljout eighteen prominent, 

 slightly wavy, ribs, eight of which extend from Ijase to summit, and form around 

 the latter a serrated rim or crown ; the remainder lie between these and end 

 irregularly at one half to three quarters distance from base, sometimes squarely 

 at one of the transverse striaj, but often curve towards and unite with the long 

 ribs ; between each pair of ribs are equi-distant transverse stria?, about twelve 

 in all, each one depressed in the middle and not often in line with the corres- 

 ponding striae of the adjoining sections ; the spaces between the ribs and stria? 

 excavated roundly. (Fig. a.) Duration of this stage fifteen days. 



Young Larva. — Length, .08 inch; cylindrical, thickest at fifth and sixth 

 segments, tapering slightly towards either exti-emity ; color dull green, translu- 

 cent ; each segment from third to twelfth marked by a transverse row of eight 

 elongated, mostly ob-ovate, tubercular, dark spots, the second on either side the 

 dorsal line lying back of the rest ; on the thirteenth a straight row of four spots, 

 and behind this another of two spots ; the second segment is narrow and is occu- 

 pied dorsally by a blackish, oblong patch, on the front of which are four small, 

 rounded tubercles, and immediately behind each of the two outer ones a similar 

 tubercle ; in addition to these, on either side of this segment are two spots like 

 those upon the other segments ; from each of the tubercular spots throughout 

 spring one or two long black hairs, curved forward ; head rounded in front and 

 at the vertices, depressed in middle at top ; color blackish brown, sparsely pilose. 

 (Fig. b.) At this stage this larva cannot be distinguished from that of Cyhele or 

 Aphrodite. The first moult occurred in eighteen days after the larva awaked 

 from hybernation. 



