16o 



MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 



'^ Stfu/e III. — Head narrowing toward vertex, witli an angle between tlie front and sides; 

 clypeus rather large; sutures evident, the median depressed at vertex. i>ody cylindrical, abdominal 

 segment 8 enlarged dorsally, sloping off rapidly to segment 9, which is small; anal feet used, 

 about the same size as the other abdominal ones. Ou abdominal segment 2 a dorsal fleshj' hump, 

 low, conical, nutant; a very slight one also on abdominal segment 3. Color lilac-white, diffusely 

 marked along the sides with a darker shade. A brown-black dorsal band jiarrowing ont and 

 disappearing on abdominal segments 4-(!, but distinct again posteriorly. Thoracic feet dark, a 

 faint white stigmatal line. 



•• StiKje IV. — Head higher than ])rotliorax, coueolorous with body, with a iinri)lisli liand lr(^m 

 the palpi narrowing to the vertex of each lobe. Some nearly coueolorous mottlings, especially 

 laterally posteriorly. Body lilac-white; the darker lateral streaks become obli(pie subdorsals, but 

 are faint, as is the white stigmatal line. Dorsal band continuous, but very narrow on abdominal 

 segments -i-O, velvety browu-black ou the nutaut hump on abdominal segment li, reddish on the 

 hump on 8. Venter heavily shaded with purple-brown. I>egs all dark; a white line on the one 

 on abdominal segment 0, Tubercles small, coueolorous with very fine short seta-. Seta i is borne 

 on the hump on the eighth abdonnnal segment, but only on the bases of the horns on abdominal 

 segments 2 and 3. Altogether similar to the last (fifth) stage." (Dyar.) 



Dr. Dyar has reared the larva, and finds that there are five stages. The widths of the head are 

 (in the larva exanuned) (>.."), 1.1, l.G, 2.3.5, 3..j mm. 



Larva hcfore last molt. — Head large, oval, Itattened in front, narrowing t(jward the vertex, 

 which is slightly bilobed; the head is wider than the thoracic segments; the body is thickest on 

 the second and third abdominal segments, on each of which is a thick, fleshy, conical, soit tubercle, 

 the apex falling over backward; they may be elevated and somewhat enlarged or depressed, the 



anterior tubercle the larger of the two; the body is nnich 

 humped dorsally on the eighth segment; supraanal ])late 

 smooth, much rounded; the anal legs slender, not nearly so 

 thick as the other abdominal legs. General color pearly, 

 glaucous, whitish gray, somewhat marbled with brown; head 

 of the same color, marbled witii l>rown; a broad, faint, lateral 

 band shaded behind with white. A brown dorsal line extends 

 from behind the head to apex of second tubercle on third 

 abdominal segment; thence a faint vascular line extends to 

 end of supraanal i)late. The hump on eighth segment pale 

 rust, yellowish red on sides, deeper jibove in the middle. A 

 pale pinkish stigmatal line. Length, 20 mm. 

 Mature larra. — Length, 40 mm. Does not differ except in size from previous stage. The head 

 is rather square on the sides, narrowing above, and scarcely bilobed above; it is of the same 

 general shape as in Schizura and Janassa. In this species, instead of a single hump on the first 

 abdominal segment, there is a large, high, soft, movable hump on the second, and which nods 

 backward, besides one a little stouter and shorter on the third. The humps are simple, with no 

 traces of a fork or of bristles, and they are both brownish, of the hue of a dead dry leaf. The 

 very prominent hump on the eighth abdominal segment bears two slight low tubercles, but no 

 bristles. The anal legs are long and slender, but the planta is well provided with crochets. 

 Underside of body dusky; the i)ale lilac lateral line sends a branch down the middle of the feet 

 on the sixth abdominal segment. 



I add Mr. Edwards's description of the full-fed caterpillar: 



Head slate color, mottled with black, and with a jiale stripe on each side. Jlouth parts with a greenish tinge. 

 Body pale lilac, with the exception of the eleventh and twelfth segments,, which are dull golden. The seventh and 

 eighth segments h.ave raised prominences, which are also golden, that of the seventh being the largest. Laterally 

 there are some pale obliijne streaks somewhat similar to those of many Sphingida'; these do not meet on the back, 

 where there is a faint slate-colored line. Between the second and sixth segments, and conmion to all of these, is a 

 darker dorsal shade which reappears on the eleventh and twelfth segments. The spiracles are white, with a black 

 ring, and the lower lateral line is paler than the rest of the body. The twelfth segment bears a hnmp. and the sides 

 of the eleventh, twelfth, and thirteenth segments are pale brown, mottled with orange. Abdoniinal legs dull slate 

 color, mottled with black; thoracic legs black. Length, 53 mm. 



Pig. G6 — End of pupa of XotuJoiUa strufiula. 

 al, anal legs: cr, the vestigial crema.ster. 



