:\rEMOIKS OF THE XATIOXAL ACADEMY OF SCIEXCES. 259 



arc sliybtly 8ut1'asc(l with a gi'eenisli ycllowisli tint. Hind winj^s with a distinct wliitisli line, 

 within which the winy- is white, but l)ey()nd dusky. 



The two pairs of hind tibial spurs are lon<;' and well developed. My original type is in the 

 collection of the Aniericau Entomological Society, Philadelphia. 



E(l(l. — Diameter, ].2mm. Low, tlattened, hemispherical, much broader than high; in sliajie 

 much like that of II. unicoloi-, but larger. Shell covered with i)olygonal areas, seen under i-in(;h A 

 eyepiece, with rather thin, not very distinct walls, not quite so distinct as in H. unicolor. Micro- 

 ])ylar region forming a rosette of four cnrcles of elongated, crowded, small polygonal areas. 



I'or several eggs I am indebted to Mr. Tallant, of Columbus, Ohio. They hatched July 27, 

 in Maine. 



Larva, Stnr/e I. — Length of body without the tails, 3.5 mm.; of the tails, 2..") mm.; total 

 length, G mm. Head moderately large, as wide as the prothoracic segment, l)ut wider than the 

 body in the middle. The head is unusually short, tlattened in front, ])ale greenish yellowish and 

 rusty brown on the sides. On the ])rothoracic segment are two long, high, rust reddish tubercles, 

 which are darker at the end, conical and rounded at the tip, and bearing a light seta; they are 

 inclined forward, and are situated far ajiart on the extreme side of the segment. The body behind 

 is narrow, cylindrical, scarcely tapering to the ninth segment. The segments are not convex, but 

 are transversely wrinkled and uniformly yellowish green. The only marking is a slight broken 

 dorsal median obsolete line, represented by a faint elongated spot in the middle of the body and 

 another near the end. 



The tails (stemapoda) are long, like those of Cerura, being almost as long as the body and 

 very slender. Their basal third is ]>ale greenish; beyond, reddish brown, becoming jialer just 

 before the tip, which seems to be enlarged. 



Itdifters from the young larva of Cerura in the prothoracic horns being vertical and laterally 

 projecting. 



Before molting the pink dorsal line becomes a little more pronounced. 



July 31 it was about to molt, when the length of the body was mm.; of the tails, 4 mm.; 

 total, 10 mm. 



It was found just molted on the mf)rning of August 2. 



Stacie II. — Length of body, 7 mm.; of the tails, o mm.; total, 12 mm. 



The head is now wider than the body and entirely peagreen or with a reddish hue; the body 

 is a pea-green with a yellowish tinge. The tubercles on the prothoracic segment are nearer 

 together at their base; they are dark coral-red, paler at base, and from Ihcm a dark pinh dorsal 

 lint extcnd.s hack to the fiuranal plate, whlenliKi on the second, fourth, and fifth {according to the 

 figures the third, si.rth, and eighth abdominal) segments. The tails are pale on the basal half, 

 beyond deep pink, and interrupted near the end by a pale ring. All the legs, both thoracic and 

 abdominal, are i)ale green and of the same green hue as the body. The segments are transversely 

 wrinkled. 



Stage III. — Whether the following description ap])lies to the end of the second or beginning- 

 of the third, I am not entirely sure, but suppose it applies to the third stage. I was unable to tind 

 the cast skin. 



Length of body, 10 mm.; of tails, i mm.; total, 11 mm. 



The head is noic suhconical, narrowing dec-idedly above toward the vertex; it now has a 

 reddish pink stripe on each side, with yellow behind. The dorsal red stripe is now continuous, 

 widening on the second and fourth abdominal segments, on the fourth forming a diamond-shaped 

 spot. The two tubercles on the prothoracic segment are large, deep coral-red, and the s[)ace in 

 front at their base is whitish, but wider than in tlu; next stage. 



A subdor.sal irregular t/elloic line, .sending an oblique narrow bar or stripe from one segment 

 donmward to the lower and hinder edge of the one behind, .so that the second and third thoracic 

 segments and abdominal .segtncnts 1 to 8 appear to have two narrow yelloir oblique bars. The tails 

 are now about one-third as long as the body, and still reddish. 



The larva has now acquired the features of the fully developed larva, with the exception that 

 the horns of the ])rothoracic segment are larger and prominent. 



The following description is of an individual found on the underside of a beech leaf at 

 Brunswick, ^le., August 0: 



