PACKARD. — TRANSFORMATIONS OF SATURNIAN MOTHS. 575 



naked, with minute tubercles in place of the horns. The head is flattened 

 in front, a little angular on the sides ; the surface rough and straw- 

 yellow, with Ave black lines of uneven width and length, a black band 

 ending on the eye-area, there being in all eight lines and spots. Clypeus 

 whitish, with two semicircular cross bands. There is a whitish patch 

 in the middle of the vertex, and a whitish area on the sides. 



The body is less cylindrical than in the previous stages, being a little flat- 

 tened, and has the general appearance of a hornless Sphingid caterpillar. 



The ground color is a delicate greenish pearly or porcelain white, 

 bathed on each side of each segment and along the hinder edge of each 

 segment with pale straw-yellow. On the smooth prothoracic segment 

 are four black dorsal spots, two round ones in front, and two large ones 

 behind ; a lateral long stripe behind the spiracle. There are no marked 

 dorsal spots ; those of the oblique lines are minute, and the black marks 

 are chiefly confined to the spiracular series. 



On the 2d thoracic segment in place of the two horns are two low, 

 rather large fleshy tubercles which are a little larger but not so high 

 and prominent as those on the 3d thoracic segment, though the two 

 latter are less broad at the base. 



On the 8th abdominal segment, in place of the atrophied caudal horn, 

 is a low inconspicuous tubercle, at the apex of which is an indistinctly 

 double (?) little wart. 



On the 9th segment are two slightly full, low swellings with seven or 

 eight short minute setae, indicating that they were the site in the an- 

 cestral form of this genus of two horns, warts, or tubercles. 



Suranal plate black at the end, which is somewhat rugose. Surface of 

 plate whitish ; on the sides and behind pale straw-yellow. On the site 

 of the two horns of the previous stages are two rounded conical black 

 tuhercles which are more solid and chitinous than those in front, and 

 more like vestigial horns. 



On the side of the segments is a black spiracular very irregular and 

 much broken line, the spiracles being black; above this line on each 

 segment are three black spots forming an oblique line, the most anterior 

 spot (forming the upper end of the line) being near the front edge of 

 each segment. On each abdominal segment except the 10th (suranal 

 plate) are two black dots situated near the front edge of the segment. 

 Below the spiracular line the body is deeper, almost orange-yellow. 



Thoracic legs pale, with black wings and spots, mid-abdominal legs 

 dull livid green with a black narrow wing at the base, and another one 

 above the planta. 



