90 Studies on Life-history of Bombycine Moths. 



8th abdominal segment being distinctly humped, while the segments 

 are transversely wrinkled. The body is pale straw-yellow, with 

 three broken reddish dorsal lines, the median one being the broadest 

 and least broken; the space on each side whitish. Two parallel 

 subdorsal distinct reddish lines enclosing a whitish band, connected 

 in front by a transverse dark reddish-black line on top of the pro- 

 thoracic segment. The upper of the two subdorsal lines dilates or 

 spreads inward a little on the 1st, 3d, and 5th abdominal segments, 

 and bends up angularly on the 8th, connecting with a transverse 

 dark line crossing the hump. A similar one on the 9th abdominal 

 segment. On the middle of the 5th abdominal segment the median 

 line dilates into a large distinct transverse oblong reddish mark. 

 There are two parallel longitudinal stripes on each segment above 

 the legs, the lower broad and firm, the upper slight and broken up 

 into spots. There are four pairs of well-developed middle al)dominal 

 legs ; the 5th or anal pair being one-third smaller than the others. 

 There are a few moderately long hairs on the back and sides of the 

 body. 



One example has black lines and marks on a greenish-yellow 

 ground. This caterpillar is a true Agaristid in appearance, the 

 hump being well marked and the body naked, as in that group, 

 though not marked with transverse bars, as in Alypia and Eudryas. 



Larva at close of final stage. — Length 18-20 mm. Several of 

 the larvse when older, having been observed June 17th, presented 

 the following characters. Whether they had molted or not I did 

 not observe. The description was drawn up from living examples, 

 just before pupation, nearly a dozen of the lot having pupated. The 

 head is lai-ge, rounded, as wide or slightly wider than the body, 

 smooth, with a few hairs, and now the head is deep cherry-red. 

 The body is smooth, of uniform thickness, with a decided, though 

 not very large and prominent hump on the 8th abdominal segment, 

 and with a few hairs, as before. Along the back are four rather 

 wide broken yellow lines, more.or less connected laterally; the lines 

 are broken on the anterior slope of the hump, forming two lunate 

 yellow dorsal spots on the 9th abdominal segment, and a single 

 large yellowish spot on the 10th segment in front of the smooth 

 rounded anal plate. Along the under side is a broad median livid 

 yellowish-green band. Both the thoracic and anal legs are blackish ; 

 the four middle abdominal legs being reddish-lilac, and rather large 



