MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 101 



spot present, the apical region being reddish brown. Within is a regularly curved light line. In 

 the middle of the wing is an obsolete rcdilish line. 



Hiud wings discolored with red along the median vein, there bending into the middle of the 

 internal margin; this is faintly eontinned iii)on the costa. A submarginal white line. Fringe on 

 the internal angle, reddish brown. The lateral tufts on the end of the abdomen reddish browu. 

 The female oidy differs in the much liroader wings. 



Expanse of wings, S 4.") mm., 9 50 mm.; length of the body, S i'O mm., 2 24 mm. 



Var. foriddita Edwards, much redder, lines fainter, the discal whitish spots more clearly 

 delined. Beneath, wings foxy red. (Coll. Amer. Mas. Nat. Hist.. New York, and Coll. Neumoegen.) 



Tiie following notes are based on the sketches and notes made for me by Mr. J. Bridgbam, 

 who kindly preserved for me in alcohol specimens of the two later stages, from which, with the 

 aid of his excellent drawing, the following description of those two stages were drawn uj). Iii 

 ajypears that there are six larval stages. 



Egg. — The eg'gs were laid on the wild cherry June 2l!, and liatched July t); another lot 

 received from Miss Jlorton, hatched July .")-(>. They are much flattened, resembling a xcry 

 shallow inverted plate, with sloping sides. The surface appears as if covered with overlai)ping 

 rings, each inclosing a circle of five, six, and sometimes seven spines. Diameter, 1 mm. 



Miss Caroline G. Soule describes the eggs as at first green, and tive days later sordid 

 yellowish white, circular, flat on both top and bottom, translucent, and looking like tiny gelatine 

 lozenges, 1.5 mm. in diameter. 



Larva, Stage I. — Length, 4-5 mm. Head and body pale greenish white or whitish flesh, with 

 no black or dark marks; head moderately large: body covered thickly with long white hairs, 

 mostly curled, which arise in irregular and scattering tufts from four dorsal and three lateral 

 tubercles; the hairs arising from the thoracic are rather longer than those from the abdominal 

 segments. 



Larva, Stage II. — Length, G mm., July Ki. 31uch as in the first stage, the hairs a little 

 denser, and the head and body still whitish, with no dark spots. 



Miss Soule says that after the first molt the larva l)ecomes "even whiter and fluflier than 

 before, with a dorsal line of black dashes, and a dark pencil on the tenth segment. A few had gray 

 hairs over the head."' 



Larva, Stage III. — Length, 11 mm., July 25. Color of the head and body the same, but the 

 woolly white hairs on the thoracic segments ai)pear to Ije thick and matted. Now api)ears along 

 the back of each abdominal segment a conspicuous black dash, anil from the eighth abdominal 

 segment arises a long, slender, tapering black pencil, which projects backward. 



Miss Soule says: "As before, with the addition of a gray i)encil on the second and third 

 Segment.'' 



Larva, Stage IV. — Length, 20 mm., August .'5. The head is yellowish white, but the body 

 slightly pale gray. From the second and third thoracic and eighth abdominal segments ari.ses a 

 black pencil, each about the same length as the other, viz, about twice as long as the thickness 

 of the body; the anterior pencil points forward, the two others backward. The interrujited black 

 dorsal stripe is as before. 



Miss Soule states that in this stage "a lateral and subventral line of black arrowheads 

 appeared. One larva became bright yellow, with the pencils tan coloreil, with black tips, and one 

 was of a soft gray, with black pencils." 



Larva, Stage V. — Length. 27 mm.. August 7. (This and the last stage described from alcoholic 

 specimens as well as from 3Ir. Bridgham's colored drawing.) Head normal, rounded, the sides 

 and top somewhat swollen, the median suture somewhat depressed: of a peculiar white-flesh color. 

 Prothoraeic segment without a pencil or a lateral black patch; second thoracic segment with two 

 contigmius rounded tubercles from which arise t\^ o long i)encils whose hairs blend together to 

 form a common median deep ocherous pencil inclined forward, becoming black at the distal 

 third. Third thoracic segment with a similar pencil inclintd backward. A similar median 

 pencil on the eighth abdonnnal segment. There is now a dorsal row of six long median black 

 stripes on abdominal segments 2 to 7. Between these spots arise a i)air of dorsal pencils 

 composed of curious long spindleshajicd flexible black hairs, pale at the base, which taper from 



