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TRANSFORMATIONS OF N. LUCILIUS. 



179 



X. TRANSFORMATIONS OF NISONIADES LUCILIUS LINTN. 



The egg measures .03 of an inch in diameter. Its shape was 

 not noted. An example examined was marked with four- 

 teen ribs and twenty-five transverse striae. 



The larva before its second molting measured .30 of an 

 inch in length, and previous to its third molting .55 of an 

 inch. After the molting, its length was .70 of an inch. Its 

 body bears numerous short, white, downy hairs, and is 

 marked with white dots. Its color is yellowish-green, espe- 

 cially on the incisures, with a blue-green vascular line. The 

 legs are tipped with fuscous, particularly the anterior pair ; 

 the prolegs are green. The segments show four annulations 

 on the posterior half. 



The body of the larva is translucent, allowing the internal 

 organs to be seen. On the eighth segment an oblong yellow 

 spot on each side of the vascular line, as in Pieris oleracea, 

 marks the position of some of the viscera, and on the second 

 segment is a similar mesial mark. The pulsations of the dor- 

 sal vessel are quite conspicuous. With a magnifier, ramifica- 

 tions of the branchiae are to be seen, surrounding the stigmata. 



After its third molting, the two brown spots on the head of 

 the larva appear, which thenceforth are so marked a feature. 

 At maturity the larva has attained a length of .8 of an inch, 

 with a diameter in its broadest part of .16 of an inch ; diam- 

 eter of head .10 of an inch. 



The last molting was on August 3d, and on the 6th the 

 chrysalis was formed. 



The chrysalis is cylindro-conical in form, not angulated ; 

 thorax slightly elevated ; head-case rounded in front, de- 

 pressed below a line drawn from the anal spine across the 

 bases of the wings to the humeral tubercle this tubercle 

 dark brown in color, cylindrical, truncated at the apex, and 

 located a little before the base of the anterior wings. The 

 stigmata are white. 



At this stage the transparency of the chrysalis permits the 

 rapid pulsations within to be clearly seen. The nervulation 



